CN117678231A

CN117678231A - Focusing method, control method, calibration method, device and storage medium of lens

Info

Publication number: CN117678231A
Application number: CN202180100404.6A
Authority: CN
Inventors: 耶方明
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2024-03-08
Also published as: WO2023065168A1

Abstract

A focusing method, a control method, a scale calibration method, equipment and a storage medium for a lens, wherein the focusing method comprises the following steps: acquiring a current rotation position of a rotation part of the follow-up device (S401); acquiring a first corresponding relation between a rotation position of the rotation part of the focus following device and a focusing parameter of a driving part of the lens (S402); determining a target focusing parameter of a driving part of the lens according to the current rotation position based on the first correspondence (S403); the target focusing parameter is transmitted to the information receiver of the lens to cause the driving part of the lens to drive the optical element according to the target focusing parameter (S404).

Description

Focusing method, control method, calibration method, device and storage medium of lens

Technical Field

The present disclosure relates to the field of shooting technologies, and in particular, to a focusing method, a control method, a scale calibration method, a device, and a storage medium for a lens.

Background

With the pursuit of photographing quality, a camera with a focus following function is generally used to take higher quality photos and videos. The lens with the focus following function comprises a manual lens and an automatic lens, wherein the manual lens is provided with a zoom ring to realize manual focus following, and the automatic lens is internally provided with a motor to realize automatic focus following. However, the manual lens has high requirements on the operation experience of the user, and the automatic lens is transitionally dependent on the automatic focusing based on the phase point and contrast detection, so that the automatic lens cannot be suitable for shooting of professional video levels.

Disclosure of Invention

The embodiment of the application provides a focusing method and a control method of a lens, a calibration method and equipment of a graduated scale and a storage medium, so as to meet shooting requirements of professional video levels.

In a first aspect, an embodiment of the present application provides a focusing method of a lens, where the lens includes a driving part and an information receiver; the information receiver is used for receiving focusing parameters; the driving component is used for responding to the focusing parameter and driving the optical element of the lens to move so as to change the focusing position; wherein the method comprises the following steps:

acquiring a current rotation position of a rotation part of a focus following device, wherein the focus following device comprises an operation part for a user to operate, and the operation part is mechanically coupled with the rotation part;

acquiring a first corresponding relation, wherein the first corresponding relation is a corresponding relation between a rotating position of the rotating part of the focus following equipment and a focusing parameter of a driving part of the lens;

determining a target focusing parameter of a driving part of the lens according to the current rotation position based on the first corresponding relation;

the target focusing parameters are sent to the information receiver of the lens, so that the driving component of the lens drives the optical element according to the target focusing parameters.

In addition, an embodiment of the present application further provides a method for controlling a lens, where the method includes:

displaying a graduated scale image area on a display interface corresponding to a lens, wherein the graduated scale image area comprises a plurality of graduated sub-areas, each graduated sub-area is provided with a graduated mark, and the graduated marks positioned on different graduated sub-areas are used for indicating different focusing positions of the lens;

acquiring the current focusing position of the lens;

determining a target scale subarea in the plurality of scale subareas according to the current focusing position;

and displaying a focus position indication mark on the target scale subarea.

In addition, the embodiment of the application also provides a scale calibrating method, which comprises the following steps:

acquiring at least two marking points, wherein each marking point comprises a rotation position of a rotation part of a motor of the focus following equipment and a focus position corresponding to a lens at the rotation position;

determining the corresponding relation between the rotation position of the motor of the focus following device and the focus closing position according to the at least two marking points;

and generating a graduated scale image area of the lens according to the corresponding relation, wherein the graduated scale image area comprises a plurality of graduated sub-areas, each graduated sub-area is provided with a graduated mark, and the graduated marks positioned in different graduated sub-areas are used for indicating different focusing positions of the lens.

In a second aspect, embodiments of the present application also provide a control apparatus, the control apparatus including a processor and a memory;

the memory is used for storing a computer program;

the processor is configured to execute the computer program and implement the focusing method of the lens according to any one of the embodiments of the present application, or implement the control method of the lens according to any one of the embodiments of the present application, or implement the calibration method of the scale according to any one of the embodiments of the present application when the computer program is executed.

In a third aspect, embodiments of the present application further provide a focus tracking apparatus, the focus tracking apparatus comprising:

a motor;

an operation part for inputting a focus control signal for a user to operate, the operation part being mechanically coupled with the rotating part of the motor and capable of driving the rotating part of the motor to rotate together;

the driving circuit is connected with the motor and used for driving the motor to rotate;

the main control circuit is connected with the driving circuit and is used for controlling the rotation part of the motor to rotate through the driving circuit;

The main control circuit comprises a processor and a memory;

the memory is used for storing a computer program;

In a fourth aspect, embodiments of the present application further provide a bearing device, where the bearing device includes a bearing portion, where the bearing portion is used to bear a lens, and the bearing device further includes a processor and a memory;

the memory is used for storing a computer program;

In a fifth aspect, embodiments of the present application further provide a focus tracking system, the focus tracking system including a lens and a focus tracking device as provided in any one of the embodiments of the present application, the focus tracking device being configured to control the lens to track a focus, the lens including a manual lens or an automatic lens.

In addition, the embodiment of the application also provides another heel focus system, which comprises a lens, a bearing device and the heel focus equipment according to any one of the embodiment of the application; the bearing device comprises a bearing part, the bearing part is used for bearing the lens, the focus following equipment is used for controlling the lens to follow focus, and the lens comprises a manual lens or an automatic lens.

In a sixth aspect, embodiments of the present application further provide a computer readable storage medium, where a computer program is stored, where the computer program when executed by a processor causes the processor to implement a method for focusing a lens according to any one of the embodiments of the present application, or implement a method for controlling a lens according to any one of the embodiments of the present application, or implement a method for calibrating a scale according to any one of the embodiments of the present application.

According to the focusing method of the lens, disclosed by the embodiment of the application, the control method of the lens, the calibration method of the graduated scale, the control device, the focus following equipment, the bearing device, the focus following system and the storage medium, the shooting requirements of applying the automatic lens and the manual lens to video levels can be met, and the experience degree of a user is further improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a focus tracking device according to an embodiment of the present application;

fig. 2 is a schematic diagram of a circuit structure of a focus tracking device according to an embodiment of the present application;

fig. 3 is a schematic structural view of a motor part of the focus following apparatus provided in the embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of FIG. 3 taken along the direction A-A;

fig. 5 is a schematic diagram of a circuit structure of an automatic lens according to an embodiment of the present application;

FIG. 6 is a schematic flow chart of steps of a method for calibrating a scale according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a presentation interface provided by an embodiment of the present application;

FIG. 8 is a schematic diagram of another presentation interface provided by an embodiment of the present application;

FIG. 9 is a schematic diagram of another presentation interface provided by an embodiment of the present application;

fig. 10 is a schematic view of a display effect of a display interface according to an embodiment of the present disclosure;

FIG. 11 is a schematic flowchart of steps of a first correspondence determination method provided in an embodiment of the present application;

fig. 12 is a schematic flowchart of steps of a second correspondence determining method provided in an embodiment of the present application;

fig. 13 is a schematic flowchart of steps of a focusing method of a lens according to an embodiment of the present application;

fig. 14 is a schematic flowchart of steps of a method for controlling a lens according to an embodiment of the present application;

FIG. 15 is a schematic block diagram of a control device provided in an embodiment of the present application;

FIG. 16 is a schematic block diagram of a focus tracking device provided in an embodiment of the present application;

fig. 17 is a schematic block diagram of a carrying device according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It is also to be understood that the terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

The flow diagrams depicted in the figures are merely illustrative and not necessarily all of the elements and operations/steps are included or performed in the order described. For example, some operations/steps may be further divided, combined, or partially combined, so that the order of actual execution may be changed according to actual situations.

With the pursuit of photographing quality, a lens with a focus following function is generally used to take higher quality photos and videos. The lens with the focus following function comprises a manual lens and an automatic lens, wherein the manual lens is provided with a zoom ring to realize manual focus following, and a motor is arranged in the automatic lens to realize automatic focus following. However, the manual lens has higher requirement on the operation experience of the user, and the automatic lens transition relies on the realization of automatic focusing based on phase point and contrast detection, so that the automatic lens transition cannot be suitable for shooting of professional video levels.

In the film industry and the video industry, the manual lens needs to be loaded with an independent external focus following motor, and through gear transmission, the lens has a focusing function, and meanwhile, the corresponding distance on each rotation angle needs to be marked by manually using a pen on a remote controller, so that the whole focus following system is complex in structure and complex in operation. The automatic lens is highly dependent on automatic focusing based on phase point and contrast detection, and further cannot be used for manual focus tracking, so that shooting requirements of the film industry and the video industry cannot be met.

Therefore, the embodiment of the application provides a focusing method of a lens, a control method of the lens, a calibration method of a graduated scale, equipment and a storage medium, so as to meet shooting requirements of film and television levels.

Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

Referring to fig. 1, fig. 1 illustrates a structure of a focus tracking device 100 provided in an embodiment of the present application, as shown in fig. 1, the focus tracking device 100 includes a remote controller 10 and a focus tracking motor 20, where the remote controller 10 is connected to the focus tracking motor 20 in a communication manner, and the remote controller 10 is used for controlling the focus tracking motor 20 to rotate so as to drive an optical element of a lens 30 to move, and specifically may drive a focusing lens of the lens 30 to move, so as to achieve focusing on a subject, and the subject may also be referred to as a shooting target.

The remote controller 10 and the tracking motor 20 may be connected in communication, for example, in a wireless communication manner, or may be connected in a wired communication manner. As shown in fig. 1, the remote controller 10 and the tracking motor 20 are connected by a connecting wire.

It should be noted that, the remote controller 10 and the focus motor 20 shown in fig. 1 are not limited to the specific structural form of the focus following apparatus 100 provided in the present application, that is, the remote controller 10 and the focus following motor 20 may be separately designed, specifically as shown in fig. 1, or may be integrally designed, where the integrated design specifically includes that the remote controller 10 and the focus following motor 20 are disposed together, for example, may be disposed in the same housing or fixed together but detachable.

Of course, in some embodiments, the following focus device 100 may be considered to not include the following focus motor 20 in terms of device division, but may be communicatively connected to the following focus motor 20 to control the following focus motor 20, that is, the following focus motor 20 may be understood to be a separate device, and the following focus device 100 may include only the remote controller 10.

The focus motor 20 includes a gear 21, and the gear 21 is used for meshing with a focus tracking ring 31 on the lens 30, and is fixedly arranged on an optical element of the lens 30 with the focus tracking ring 31. The following motor 20 is mechanically coupled with the gear 21 to drive the gear 21 to rotate, the gear 21 rotates to drive the following ring 31 to rotate, and the following ring 31 rotates to drive the focusing lens of the lens 30 to move, so that the following shooting of a shot object is realized.

In some embodiments, the lens 30 and the tracking motor 20 are both disposed on a carrier, wherein the carrier includes a carrier portion for receiving the lens 30. In this embodiment of the present application, the carrying device may include a camera stand, a stand, or a handheld cradle head.

In some embodiments the carrier device is further provided with a display for displaying information, such as for displaying a photographed image, or for displaying a scale or the like.

In some embodiments, the remote controller 10 may be independent of the carrying device, and in other embodiments, the remote controller 10 may be integrated with the carrying device, so as to facilitate the operation of a user, for example, the remote controller 10 may be integrated with a handle of a handheld cradle head.

For example, as shown in fig. 1, the following motor 20 and the lens 30 may be disposed on a camera support 40, where the camera support 40 is one type of bearing device, and the gear 21 of the following motor 20 is engaged with the following ring 31 on the lens 30 to drive the following ring 31 to rotate.

It should be noted that, the lens 30 shown in fig. 1 needs to be driven by the tracking motor 20 to achieve focusing, i.e., the lens 30 shown in fig. 1 is a manual lens.

In the embodiment of the present application, the lens 30 may further include an automatic lens, that is, the lens 30 may include a driving part that performs focusing on the subject by moving an optical element that drives the lens 30. In particular, the drive component may be a motor assembly.

When the lens 30 is an automatic lens, the tracking device 100 is in communication with the lens 30, the communication connection includes a direct communication connection or an indirect communication connection, the direct communication connection between the tracking device 100 and the lens 30 includes a wireless communication connection or a wired communication connection, the indirect communication connection between the tracking device 100 and the lens 30, such as the communication connection between the tracking device 100 and a carrier device, which is in communication connection with the lens 30.

For example, the carrier device comprises a carrier part for receiving the lens 30, on which carrier part contacts are provided, by means of which contacts the lens 30 is connected to the carrier device when the lens 30 is arranged on the carrier part. The bearing device is also in communication connection with the focus following equipment (remote controller 10) to acquire a focus following control signal of the focus following equipment, and generates a lens control signal according to the focus following control signal and sends the lens control signal to the lens, so that the lens controls the driving part to drive the focusing lens to move according to the lens control signal to realize focus following.

The following will take fig. 1 and fig. 2 as an example, to describe in detail the specific structure and working principle of the focus tracking device 100 provided in the present application.

Referring to fig. 1 with reference to fig. 2, fig. 2 shows a circuit configuration of the tracking device 100. As shown in fig. 2, the focus following apparatus 100 includes an operation member 11, a motor 12, a driving circuit 13, and a main control circuit 14, wherein the motor 12 includes a rotor and a coil, and specifically, the remote controller 10 includes the operation member 11, the motor 12, the driving circuit 13, and the main control circuit 14.

The operation part 11 is used for a user to input a focus tracking control signal, for example, the user rotates the operation part 11 to generate the focus tracking control signal, and the remote controller 10 can drive the optical element of the lens 30 to move through the focus tracking motor 20 to realize focus tracking according to the focus tracking control signal.

The focus control signal may be, for example, a pulse signal, which controls the focus lens of the lens 30 to be moved by one step by the focus motor 20, and the focus control signal includes the number of pulse signals and the rotation angle by which the user rotates the operation member 11, that is, the larger the rotation position is, the larger the number of pulse signals is included, and the longer the focus lens movement distance of the lens 30 is driven.

Note that, if the lens 30 is an automatic lens, the control manner is similar to that of the focus motor 30, and the control is also performed according to the pulse signal, and the lengths of the advance steps corresponding to the focus motor and the motor inside the lens may be different.

The operation member 11 is mechanically coupled to a rotating portion (e.g., a rotor) of the motor 12, and is capable of driving the rotating portion of the motor 12 to rotate together and giving a moment to the motor 12, whereby it is possible to detect that a user operates the operation member 11 through the motor 12; at the same time, the rotating part of the motor 12 drives the operating member 11 to move when rotating, thereby providing feedback to the user through the operating member 11.

For example, in the embodiment of the present application, the rotating portion of the motor 12 drives the operating member 11 to move when rotating, so that the corresponding operation feeling can be simulated and fed back to the operating member 11, and the operation feeling may include a damping operation feeling, and of course, may also include other types of operation feeling, which is not limited herein.

In some embodiments, as shown in fig. 1, 3 or 4, the operation member 11 is, for example, a rubber ring 110, where the rubber ring 110 is mechanically coupled to a rotating portion of the motor 12, for example, through a shaft connection or through a gear connection, and when the user rotates the rubber ring 110, the rubber ring 110 can drive the rotating portion of the motor 12 to rotate together, and at the same time, the rotating portion of the motor 12 also drives the rubber ring 110 to move when rotating.

In some embodiments, the operating member 11 of the heel focus device 100 may be further provided with a damping grease for providing a damping operation feeling, with which the damping operation feeling can be achieved without the motor 12 of the heel focus device 100.

In some embodiments, as shown in fig. 3 and 4, the remote control 10 further includes a circuit board 15, and the circuit board 15 is provided with a driving circuit 13 and/or a main control circuit 14. Specifically, the driving circuit 13 may be provided on the circuit board 15, and the circuit board 15 may be provided with a position sensor, such as a hall sensor 160, for detecting angular position information of the rotating portion of the motor 12, that is, the rotating position of the rotating portion of the motor 12, in cooperation with the magnet ring 16 provided on the motor 12.

The motor 12 may comprise a permanent magnet synchronous motor or a direct current motor, but may be any other type of motor, without limitation. As shown in fig. 4, the motor 12 includes a rotating portion 121 and a coil 122.

The driving circuit 13 is connected with the motor 12 and is used for driving the rotating part 121 of the motor 12 to rotate, and the driving circuit 13 can specifically adopt a three-phase inverter bridge circuit, and the rotating part 121 of the motor 12 is driven to rotate in a commutation manner through a PWM signal.

The main control circuit 14 is connected with the driving circuit 13, and is used for completing output torque control and target closed-loop control of the motor 12 according to angle position information of a rotating part 121 of the motor 12 and electric parameters of a coil 122 of the motor 12, wherein the main control circuit 14 can comprise a processor and a memory, and the electric parameters of the coil of the motor 12 comprise current and/or voltage.

In some embodiments, a distance measuring device may be further disposed on the lens 30 to measure the distance between the subject and the lens 30, and of course, the distance measuring device may be disposed at other positions, for example, the distance measuring device may be disposed on the camera stand 40, that is, the carrying device may be disposed.

In an embodiment of the present application, the distance measuring device is used for measuring an object distance from an object to the lens.

In some embodiments, the distance measuring device may be, for example, a Time of flight (TOF) sensor, although other distance measuring devices, such as a laser distance measuring device or a binocular camera, are also possible.

In the embodiment of the present application, the rotational position of the rotating portion 121 of the motor 12, specifically, the angular position information, may be obtained using a position sensor or may be obtained by a software calculation method without using a position sensor.

Illustratively, the remote control 10 further includes a position sensor for detecting angular position information of the rotating portion of the motor 12 and transmitting the angular position information to the main control circuit 14. The position sensor comprises at least one of a magnetic ring Hall sensor, a photoelectric encoder and a magnetic encoder.

In the embodiment of the present application, a magnetic ring position hall sensor is used, specifically, as shown in fig. 4, a magnetic ring 16 is mounted on a motor 12, a hall sensor 160 is mounted on a circuit board 15, and angular position information of a rotating portion of the motor 12 is detected by the hall sensor 160 and the magnetic ring 16. The Hall sensor can be a single-axis Hall sensor or a three-axis Hall sensor, and the number of the Hall sensors is not limited, and one or more Hall sensors can be used.

For example, the angular position information may be obtained by a software calculation, and the main control circuit 14 may specifically obtain the current and the voltage when the motor 12 is operated, and calculate the angular position information of the rotating portion of the motor 12 according to the current and the voltage.

Referring to fig. 5, fig. 5 shows a circuit configuration of an automatic lens including an information receiver 301 and a driving part 302. The information receiver 301 is configured to receive the focusing parameters and transmit them to the driving section 302. The driving section 302 is for driving an optical element (focus lens) of the automatic lens to move to change the in-focus position in response to the focusing parameter.

The information receiver 301 may analyze a focus tracking control signal sent by the focus tracking device, or analyze a driving control signal sent by the carrier device to obtain a corresponding focusing parameter, where the driving control signal may be the focus tracking control signal, or may be generated according to the focus tracking control signal.

In some embodiments, the information receiver 301 does not have parsing capability but is simply a connection line connecting the driving part 302 and the contact points of the lens 30, the contact points of the lens 30 being in contact connection with the contact points of the carrier when the lens 30 is mounted on the carrier. The carrier obtains focusing parameters according to the focus following control signals and sends the focusing parameters to the driving component 302, so that the driving component 302 responds to the focusing parameters to drive the optical elements of the automatic lens to move so as to change the focus position.

In addition, embodiments of the present application also provide a heel focus system, including: the following device can be any one of the following devices, and the carrying device is used for placing a lens. The focus following device can be arranged on the bearing device or can be arranged on the independent bearing device, and the focus following device can execute any one of the adjustment method or the control method of the lens provided by the embodiment of the application.

In the following, a calibration method of a scale, a focusing method of a lens, and a control method of the lens will be described based on the focus following device and the bearing device provided in the above embodiments.

Because all adopt the manual pen of using to mark out the distance that corresponds on each rotation position on the remote controller of present focus equipment, mark the distance scale promptly to the user is when using the remote controller to carry out focus control with this distance scale, because the user both need watch the shooting image that the display shows, need consult this scale again, so the operation is inconvenient, still can make the structure of whole focus system comparatively complicated simultaneously, the operation is more loaded down with trivial details.

In addition, when the distance graduated scale is marked on the remote controller by using the pen, different graduated scales are required to be marked aiming at different lenses, so that when the same user uses different lenses, the distance graduated scale is required to be re-marked, and the operation handfeel is different due to different marked distance graduated scales, so that the operation of the user is influenced.

For example, when the user uses the lens 1, the rotation operation part of the distance scale 1 corresponding to the lens 1 and the distance scale 2 corresponding to the lens 2 rotates a certain position, such as 1/2 turn, on the distance scale 1, so that the lens 1 can form a clear image of the object located at 1m, and then when the user uses the lens 2, the user also wants to rotate 1/2 turn, so that the lens 2 can form a clear image of the object located at 1 m. However, when the operation member 1/2 is rotated due to the difference between the lens 1 and the lens 2, the lens 2 cannot be made to form a clear image of the subject located at 1m, and thus the operation hand feeling of the lens 1 and the lens 2 is not uniform, and thus the user operation is affected.

Therefore, the embodiment of the application provides a calibration method of a graduated scale, which can be applied to terminal equipment, and can be applied to focus tracking equipment or a bearing device.

As shown in fig. 6, the calibration method specifically includes steps S101 to S103:

s101, acquiring at least two marking points, wherein each marking point comprises a rotation position of a rotation part of a motor of the focus following device and a focus position corresponding to a lens at the rotation position.

Specifically, a first rotational position of a rotational portion of a motor of a focus following apparatus and a first focusing position of the lens at the first rotational position can be acquired, wherein the first rotational position can focus the lens at infinity; and acquiring a second rotation position of a rotation part of a motor of the focus following device and a second focusing position corresponding to the lens at the second rotation position, wherein the second rotation position can enable the lens to focus on a target object to be measured in a shooting environment.

The focusing position of the lens can be determined according to the object distance from the measured object to the lens. The object distance from the object to be measured to the lens can be measured by a distance measuring device, and the distance measuring device can be arranged on the bearing device or the lens.

S102, according to the at least two marking points, determining the corresponding relation between the rotation position of the motor of the focus following device and the focusing position.

Specifically, the first rotational position and the first focusing position constitute a mark point 1, and the second rotational position and the second focusing position constitute a mark point 2, whereby the correspondence relationship of the rotational position of the rotational portion of the motor of the focus following apparatus and the focusing position can be determined from the mark point 1 and the mark point 2.

It should be noted that more marking points are also collected, each marking point includes a rotation position of the rotation part of the motor of the focus following device and a focus position corresponding to the lens at the rotation position, and according to the more marking points, a corresponding relationship between the rotation position of the rotation part of the motor of the focus following device and the focus position can be more accurately determined.

S103, generating a graduated scale image area of the lens according to the corresponding relation.

The corresponding relation can be used for generating a graduated scale image area of the lens and displaying the graduated scale image area, so that a user can watch the graduated scale during focus following control, and the user can operate conveniently. The scale image area comprises a plurality of scale sub-areas, each scale sub-area is provided with scale marks, and the scale marks positioned on different scale sub-areas are used for indicating different focusing positions of the lens. Because the user can conveniently watch the shooting image displayed by the display, and meanwhile, the user needs to refer to the graduated scale to carry out focus following operation, the shooting experience of the user is improved.

As shown in fig. 7, fig. 7 illustrates a presentation interface provided in an embodiment of the present application, where the presentation interface 500 includes an image display area 51, and the image display area 51 is used for displaying a captured image, for example, a displayed image includes an object to be tested, and the object to be tested is specifically a pedestrian 501. The display interface 500 further displays a scale image area 52, where the scale image area 52 is generated according to a corresponding relationship between a rotation position and a focusing position of a rotation part of a motor of the focusing device.

The scale image area 52 comprises a plurality of scale sub-areas 521, each scale sub-area 521 displays scale marks, and the scale marks positioned on different scale sub-areas 52 are used for indicating different focusing positions of the lens. The different focus positions are matched with different object distances, namely one focus position can form a clear image for a shot object with corresponding object distances, and thus the focus position of the lens can be represented by the object distances.

Illustratively, as shown in FIG. 7, scale designations such as 3, 3.6, 4, 4.6, 5, 5.6, 6, and 7, respectively, on different scale subregions 52 are in feet, and specifically correspond to different object distances, which can be used to indicate different focus positions of the lens.

In an embodiment of the present application, each scale mark is used for indicating one in-focus position of the lens, and a plurality of scale marks include: adjacent first scale marks and second scale marks, and adjacent third scale marks and fourth scale marks; the first scale mark and the second scale mark indicate a difference of Jiao Weizhi in focus, the third scale mark and the fourth scale mark indicate Jiao Weizhi in focus, and the difference of Jiao Weizhi in focus is the same as the difference of Jiao Weizhi in focus.

For example, as shown in fig. 7, for example, the adjacent first scale mark and second scale mark are 3 and 3.6 respectively, and the adjacent third scale mark and fourth scale mark are 4 and 4.6 respectively, then the difference of the first focus position difference between the first scale mark and the second scale mark indicated by the aggregate Jiao Weizhi is 0.6, the difference of the second focus position difference between the third scale mark and the fourth scale mark indicated by the aggregate Jiao Weizhi is 0.6, but the pixel distance corresponding to the first focus position difference at the display interface is different from the pixel distance corresponding to the first focus position difference at the display interface. Therefore, the scale marks displayed in the scale image area can be unevenly distributed, and the uneven distribution corresponds to the actual adjustment of the focusing position of the lens, so that the user can more conveniently control the tracking focus of the lens by referring to the scale.

In some embodiments, each of the plurality of scale markings is for indicating a focus position of the lens, the plurality of scale markings comprising: the display device comprises a first scale mark, a second scale mark, a third scale mark and a fourth scale mark, wherein the first scale mark and the second scale mark are spaced by a first pixel distance at the display interface, the third scale mark and the fourth scale mark are spaced by a second pixel distance at the display interface, the combination Jiao Weizhi indicated by the first scale mark and the second scale mark differ by a first focusing position difference value, and the combination Jiao Weizhi indicated by the third scale mark and the fourth scale mark differ by a second focusing position difference value; wherein a first ratio of the first focus position difference to the first pixel distance is different from a second ratio of the second focus position difference to the second pixel distance. Therefore, the scale marks displayed in the scale image area can be unevenly distributed, and the uneven distribution corresponds to the actual adjustment of the focusing position of the lens, so that the user can more conveniently control the tracking focus of the lens by referring to the scale.

In some embodiments, a first scale mark and a second scale mark are spaced by a first pixel distance on the display interface, the first pixel distance is positively correlated with a target rotation mileage of an operating component of the follow-up device, and the target rotation mileage is a mileage that enables the lens to rotate correspondingly when the lens is adjusted from a first focusing position corresponding to the first scale mark to a second focusing position corresponding to the second scale mark. Therefore, the user can rotate the same mileage when rotating the operation part each time, the change positions of the indication marks of the focus positions displayed in the image area of the graduated scale are the same, and the change positions of the indication marks are specifically the pixel distance moved on the display interface.

The first scale mark, the second scale mark, the third scale mark and the fourth scale mark may be any scale mark of a plurality of scale marks.

In some embodiments, the object distance between the shot object and the lens in the view-finding range of the lens can be obtained; determining a focus position matching the object distance; and displaying a focus position indication mark on a scale subarea corresponding to the focus position matched with the object distance. Therefore, the user can observe the focus position indication mark and further know the current focus position of the lens, so that the lens is controlled to follow focus.

For example, as shown in fig. 7, for example, when determining the focusing position, such as 4 feet, matched with the object distance, the focusing position indication mark may specifically be that the scale mark corresponding to 4 feet has different display modes, for example, the scale mark corresponding to 4 feet is displayed in a different color from other scale marks, and specifically, for example, the scale mark corresponding to 4 feet is displayed in red.

Illustratively, as shown in fig. 8, the in-focus position indication identifier 522 may be a straight line with an arrow pointing to a scale identifier in the scale sub-area, indicating the current in-focus position of the lens.

In some embodiments, as shown in fig. 8, a subject identifier 523 is displayed at the scale sub-region corresponding to the in-focus position that matches the subject distance, the subject identifier 523 being used to indicate that a subject is present at the corresponding in-focus position. Specifically, the subject identifier 523 includes a point cloud identifier. Wherein the arrowed line may also cover the subject identifier 523 so that the user may more intuitively determine that a subject is present at the corresponding in-focus position.

In some embodiments, as shown in fig. 7, 8 or 9, the presentation interface 500 includes an image display area 51, the image display area 51 being configured to display the image captured by the lens, and the scale image area 52 being located on one side of the image display area 51.

In some embodiments, as shown in fig. 9, the presentation interface 500 further includes a focus position adjustment control image area 53, and the user can adjust the focus position of the lens by operating the focus position adjustment control image area 53, specifically, determining an adjustment amount of the focus position in response to a manipulation gesture of the user in the focus position adjustment control image area; and adjusting the focusing position of the lens according to the adjustment quantity. Therefore, a user can conveniently control the focusing position of the lens to follow the focus when the follow-focus device is not used.

It should be noted that fig. 10 shows an effect diagram of actual use of the display interface design provided in the embodiment of the present application.

In some embodiments, in order to unify scales and operation handfeel of different lenses, compensation coefficients corresponding to each lens may also be obtained, where the compensation coefficients corresponding to different lenses are different; and generating a graduated scale image area of the lens according to the corresponding relation and the supplementary coefficient, wherein the supplementary coefficient can enable different lenses to correspond to the same graduated scale image area, and a plurality of graduated scale subregions and displayed graduated scale marks included in the same graduated scale image area are the same.

It will be appreciated that, by the compensation system, a plurality of different lenses may have the same scale image area, although the focus positions of the lenses are different, for example, the scale image areas corresponding to the different lenses are all the scale image areas illustrated by the display interface 500 in fig. 7. The compensation coefficient can also enable the rotation position of the rotation part of the motor of the follow-focus device to be the same when different lenses change the same focusing position.

Illustratively, for example, the lens 1 needs to rotate 1/2 turn around the operating member of the follow-up device when changing from 1 foot to 2 feet, and the lens 2 needs to rotate 1 turn around the operating member of the follow-up device when changing from 1 foot to 2 feet, so that the compensation system can realize that the lens 2 can realize that 1/2 turn around the operating member of the follow-up device when changing from 1 foot to 2 feet. Thus realizing uniform operation hand feeling of different lenses.

It should be noted that, the compensation coefficient of each lens is relative to the target lens, that is, the compensation coefficient is unified with the operation hand feeling and the scale of the target lens. Specifically, the target lens may be the lens that is calibrated by the first user, or the lens provided by the manufacturer, where the compensation coefficients of the target lens are all 1, which may also be understood that the target lens does not need to be compensated.

In an embodiment of the present application, as shown in fig. 11, a method for determining a first correspondence is further provided, where the first correspondence is a correspondence between a rotational position of the rotational portion of the focus following device and a focusing parameter of a driving component of the lens, and is mainly directed to an automatic lens.

The determining method specifically includes steps S201 to S203:

s201, acquiring a first mapping relation between a rotation position of a rotation part of a motor of a focus following device and a focusing position of the lens;

s202, acquiring a second mapping relation between focusing parameters of a driving part of the lens and the focusing position of the lens;

s203, determining the first corresponding relation according to the first mapping relation and the second mapping relation.

Since the first mapping relationship and the second mapping relationship each include the in-focus position of the lens, the first mapping relationship can be determined according to the common quantity (in Jiao Weizhi) by using the first mapping relationship and the second mapping relationship, where the first mapping relationship is a correspondence relationship between the rotational position of the rotational part of the focus following device and the focusing parameter of the driving part of the lens.

After the first correspondence is determined, the first correspondence may be stored on the focus tracking device or the bearing device, or stored in a preset server.

In an embodiment of the present application, the focal position of the lens may be determined according to an object distance from the object to be measured to the lens. The object distance from the object to be measured to the lens is measured by a distance measuring device, and the distance measuring device is arranged on the bearing device or the lens.

It should be noted that, each focusing position of the lens may form a clear image for the subject at a corresponding one of the object distances, that is, it may be understood that the subject may correspond to different focusing positions in the lens at different object distances, and each focusing position of the lens matches one of the object distances of the subject. Thus, the in-focus position of the lens can be expressed by the object distance based on the correspondence between the object distance and the in-focus position.

In some embodiments, since the rotational position of the rotational portion of the motor of the follow focus device can change the in-focus position of the lens by driving the optical element in motion by the driving part of the lens, the in-focus position of the lens and the rotational position are in a linear relationship, and the in-focus position of the lens can be represented by the object distance. The first mapping relationship between the rotation position of the motor of the focus following device and the focusing position of the lens can be obtained by acquiring at least two first mark points, wherein each first mark point comprises the rotation position of the motor of the focus following device and the corresponding object distance under the rotation position, and the first mapping relationship is determined according to the at least two first mark points. Of course, in order to make the first mapping relationship more accurate, more first mark points may be acquired to obtain the first mapping relationship.

In some embodiments, a first rotational position of a rotational portion of a motor of a focus following device and a corresponding first object distance at the first rotational position may be obtained, wherein the first rotational position may enable the lens to be focused at infinity, and the first object distance is infinity when the lens is focused at infinity; the method comprises the steps of obtaining a second rotation position of a rotation part of a motor of a focus following device and a second object distance corresponding to the second rotation position, wherein the second rotation position can enable the lens to focus on a target measured object in a view finding range, and the second object distance is an object distance from the target measured object to the lens; and determining the first mapping relation according to the first rotating position and the first object distance, the second rotating position and the second object distance, namely, forming a first marking point by the first rotating position and the first object distance, forming another first marking point by the second rotating position and the second object distance, and determining the first mapping relation according to the two first marking points.

Specifically, for example, the first rotation position is A1, the first rotation position A1 can enable the lens to focus at infinity, and then the first object distance d1 is infinity; the second rotation position is A2, the second rotation position A2 can enable the lens to focus on a target object to be measured in a view finding range, and the object distance from the target object to the lens is a second object distance d2, which can be measured by a distance measuring device. The first rotational position and the first object distance constitute one first marker point (A1, D1), and the second rotational position and the second object distance constitute the other first marker point (A2, D2), wherein d1=1/D1, d2=1/D2, d1=0 since D1 represents infinity. The first mapping relationship can thus be determined from the first marker point (A1, D1) and the first marker point (A2, D2).

In the embodiment of the present application, the determining manner of the second mapping relationship is the same as the determining manner of the first mapping relationship, specifically, at least two second mark points are obtained, and the second mapping relationship is determined according to the at least two second mark points; each second mark point comprises a focusing parameter of a driving component of the lens and a corresponding object distance under the focusing parameter.

In some embodiments, a first focusing parameter of a driving component of the lens and a corresponding third object distance under the first focusing parameter may be acquired, where the first focusing parameter may enable the lens to focus at infinity, and when the lens focuses at infinity, the third object distance is infinity; acquiring a second focusing parameter of a driving component of the lens and a fourth object distance corresponding to the second focusing parameter, wherein the second focusing parameter can enable the lens to focus on a target measured object in a view finding range, and the fourth object distance is the object distance from the target measured object to the lens; and determining the second mapping relation according to the first focusing parameter, the third object distance, the second focusing parameter and the fourth object distance.

Specifically, for example, if the first focusing parameter is B1, and the first focusing parameter is B1, the lens can be focused at infinity, and then the third object distance d3 is infinity; the second focusing parameter is B2, and the second focusing parameter B2 can enable the lens to focus on a target object to be measured in the view-finding range, and the object distance from the target object to the lens is a fourth object distance d4, which can be obtained by measuring through a distance measuring device. The first focusing parameter and the third object distance form one second mark point (B1, D3), and the second focusing parameter and the fourth object distance form the other second mark point (B2, D4), wherein d3=1/D3, d4=1/D4, and d3=0 because D3 represents infinity. The second mapping relationship can thereby be determined from the second marker points (B1, D3) and the second marker points (B2, D4).

In an embodiment of the present application, as shown in fig. 12, a method for determining a second correspondence is further provided, where the second correspondence is a correspondence between a rotational position of the rotating portion of the focus following device and a focusing parameter of the focus following motor, and is mainly aimed at a manual lens.

The determining method specifically includes steps S301 to S303:

s301, acquiring a first mapping relation between a rotation position of a rotation part of a motor of a focus following device and a focusing position of the lens;

S302, obtaining a third mapping relation between focusing parameters of a focus following motor and the focusing position of the lens;

s303, determining the first corresponding relation according to the first mapping relation and the third mapping relation.

Because the first mapping relation and the third mapping relation both comprise the focusing position of the lens, a second corresponding relation can be determined by utilizing the first mapping relation and the third mapping relation according to the common quantity (the sum Jiao Weizhi), and the second corresponding relation is a corresponding relation between the rotating position of the rotating part of the focus following equipment and the focusing parameter of the focus following motor.

After determining the second correspondence, the second correspondence may be stored on the focus tracking device or the bearing device, or stored in a preset server.

The focusing position of the lens can be determined according to the object distance from the measured object to the lens. The object distance from the object to be measured to the lens can be measured by a distance measuring device, and the distance measuring device is arranged on the bearing device or the lens.

Note that, the determination manner of the first mapping relation in this embodiment is the same as that of the first mapping in the above embodiment, and will not be described in detail here.

In some embodiments, at least two third mark points may be obtained, where each third mark point includes a focusing parameter of the focus following motor and a corresponding object distance under the focusing parameter; and determining the third mapping relation according to the at least two third mark points.

For example, a first focusing parameter of the focus following motor and a fifth object distance corresponding to the first focusing parameter are obtained, wherein the first focusing parameter can enable the lens to focus at infinity, and when the lens focuses at infinity, the fifth object distance is infinity; acquiring a second focusing parameter of the focus following motor and a sixth object distance corresponding to the second focusing parameter, wherein the second focusing parameter can enable the lens to focus on a target measured object in a view finding range, and the sixth object distance is an object distance from the target measured object to the lens; and determining the third mapping relation according to the first focusing parameter and the fifth object distance of the focusing motor, and the second focusing parameter and the sixth object distance of the focusing motor, wherein the first focusing parameter and the fifth object distance form a third mark point, and the second focusing parameter and the sixth object distance form another third mark point, so that the third mapping relation can be determined according to the two third mark points.

The second correspondence relationship and the first correspondence relationship are determined in the same manner, and thus are not described in detail herein. Because the focusing parameters of the driving part and the focusing parameters of the follow-focus motor are used for driving the optical element of the lens to move so as to change the focusing position of the lens.

Referring to fig. 13, fig. 13 shows a step flow of a focusing method for a lens provided in the present application, and the method may be applied to any one of the following focus devices or the bearing apparatus provided in the embodiments of the present application. The bearing device comprises a bearing part, wherein the bearing part is used for bearing the lens.

It should be noted that the lens has an automatic focus following function, that is, the lens includes a driving component and an information receiver, the information receiver is used for receiving a focusing parameter, the driving component is used for responding to the focusing parameter, and driving an optical element of the lens to move so as to change a focus position, and the lens is an automatic lens.

Wherein the following focus device may provide any one of the above embodiments with the following focus device, the following focus device including a motor and an operation member for user operation to input a following focus control signal, the operation member being mechanically coupled with a rotating portion of the motor.

Before introducing the focusing method of the lens, it should be noted that, at present, when the lens with the automatic focus following function is realized, specifically, by utilizing the principle of contrast focusing, when the lens is aligned to the shot object, the motor in the lens module drives the focusing lens to move from the bottom (near the image sensor) to the top, in this process, the image sensor will perform comprehensive detection on the whole scene range in the depth direction, continuously record contrast values such as contrast, and then find out the position with the maximum contrast, the lens moving to the top will return to the position again, thus completing the final focusing, and realizing the automatic focus following. And thus cannot meet the shooting requirements of the movie industry.

In the embodiment of the application, the automatic lens is controlled by the focus following equipment, and the focusing method provided by the embodiment of the application is executed, so that the automatic lens can meet the basic requirement of manual focus following in the film and television industry, and further, a user can conveniently apply the automatic lens to film and television shooting in a use mode meeting the requirement of the film and television industry. Therefore, the advantages of the automatic lens are combined with the use requirements of the film industry, and a lens focus following scheme which is simple to use, maintain and low in cost is generated.

As shown in fig. 13, the focusing method of the lens includes steps S401 to S404.

S401, acquiring the current rotation position of the rotation part of the follow-focus device.

When a user realizes focus tracking shooting when using the focus tracking device to control the lens, the user can operate an operation part of the focus tracking device to realize the control of the lens. For example, when the user rotates the operating member of the focus following device, the operating member is mechanically coupled to the motor of the focus following device, so that the operating member drives the rotating portion of the motor to rotate, thereby detecting the angular position information of the rotating portion of the motor, that is, the current rotation position.

It should be noted that the current rotation position may be a rotation variable corresponding to the rotation portion of the motor, such as 1 turn or 1/2 turn. Of course, the angle position corresponding to the rotating part of the motor can also be provided.

S402, acquiring a first corresponding relation, wherein the first corresponding relation is a corresponding relation between a rotation position of the rotation part of the focus following equipment and a focusing parameter of a driving part of the lens.

After the current rotation position of the rotation part of the motor of the focus following device is obtained, a first corresponding relation can be obtained, wherein the first corresponding relation is a corresponding relation between the rotation position of the rotation part of the motor of the focus following device and focusing parameters of a driving part of the lens.

In some embodiments, the first correspondence may be pre-stored in the tracking device or the carrier device, after the current rotational position of the rotational portion of the motor of the tracking device is obtained, so as to obtain the first correspondence from the tracking device or the carrier device.

In other embodiments, the first correspondence may of course be stored in advance in a database corresponding to a preset server, for example, in a preset cloud server, and after the current rotation position of the rotation part of the motor of the focus tracking device is obtained, the first correspondence may also be obtained from the preset cloud server.

S403, determining target focusing parameters of a driving component of the lens according to the current rotation position based on the first corresponding relation.

The method specifically comprises the steps of determining a focusing parameter corresponding to a current rotation position according to the current rotation position by utilizing a first corresponding relation, namely, a target focusing parameter of a driving component of a lens.

In some embodiments, the current rotation position may of course also be sent to the cloud server, so that the cloud server determines, based on the first correspondence, a target focusing parameter corresponding to the current rotation position, and feeds back the determined target focusing parameter.

S404, the target focusing parameter is sent to the information receiver of the lens, so that the driving component of the lens drives the optical element according to the target focusing parameter.

After the target focusing parameters of the driving part of the lens are determined, the target focusing parameters are sent to the information receiver of the lens, so that the driving part of the lens controls the driving part to drive the optical element of the lens to move according to the target focusing parameters, and then the focusing position of the lens is adjusted, and therefore the lens with an automatic focusing function has a manual focusing function, and further shooting requirements of the film industry can be met.

In some embodiments, the lens may be mounted to the carrier, and the information receiver of the lens is in communication with the carrier. The target focus parameter may thus be transmitted by the carrier device to the information receiver.

Illustratively, the carrier comprises a carrier portion provided with contacts; the lens is arranged on the bearing part, and the information receiver of the lens is in communication connection with the bearing device through the contact.

In some embodiments, the focus tracking device is communicatively connected to the carrier, so that the carrier may obtain the current rotational position of the rotational portion of the focus tracking device, and obtain the target focusing parameter based on the first correspondence. Of course, the focus tracking device may obtain the target focusing parameter based on the first corresponding relationship according to the current rotation position, and send the target focus tracking parameter Jiao Canshu to the bearing device, or directly send the target focus tracking parameter to the information receiver.

The focus tracking device may obtain the target focusing parameter according to the current rotation position and based on the first correspondence, or the focus tracking device may send the current rotation position to the terminal device, and the terminal device may obtain the target focusing parameter according to the current rotation position and based on the first correspondence, and send the target focusing parameter to the focus tracking device.

It is understood that the information receiver of the tracking device and the lens may be connected based on wired and/or wireless communication, so that the tracking device may send the target focusing parameters to the information receiver of the lens via the wired and/or wireless communication.

In some embodiments, the focusing method may further display a scale image area on a display interface corresponding to the lens; acquiring the current focusing position of the lens; determining a target scale subarea in the plurality of scale subareas according to the current focusing position; and displaying a focus position indication mark on the target scale subarea.

The scale image area is obtained by adopting the scale calibration method provided by the embodiment, and the scale image area comprises a plurality of scale subareas, each scale subarea displays scale marks, and the scale marks positioned on different scale subareas are used for indicating different focusing positions of the lens, as shown in fig. 7, 8, 9 or 10.

For example, as shown in fig. 9, for example, the current focusing position of the lens is 8 feet, the focusing position is 8 feet, the user operates the focusing following device, the target focusing parameter determined by the first corresponding relation is utilized, the target focusing parameter is sent to the lens, and the lens drives the optical element to move according to the target focusing parameter, so that the focusing position is obtained. After the current focusing position of the lens is 8 feet, determining a target scale subarea in the plurality of scale subareas according to the current focusing position, wherein the target scale subarea is a region corresponding to 8 feet of scale marks, and displaying a focusing position indication mark, such as a straight line with an arrow shown in fig. 9, in the target scale subarea.

In some embodiments, each of the scale markings is for indicating a focus position of the lens, the plurality of scale markings comprising: adjacent first scale marks and second scale marks, and adjacent third scale marks and fourth scale marks; the first scale mark and the second scale mark indicate a difference of Jiao Weizhi in focus, the third scale mark and the fourth scale mark indicate Jiao Weizhi in focus, and the difference of Jiao Weizhi in focus is the same as the difference of Jiao Weizhi in focus. Therefore, the scale marks displayed in the scale image area can be unevenly distributed, and the uneven distribution corresponds to the actual adjustment of the focusing position of the lens, so that the user can more conveniently control the tracking focus of the lens by referring to the scale.

In some embodiments, the object distance between the shot object in the view-finding range of the lens and the lens can be obtained; determining a focus position matching the object distance; and displaying a shot object mark at the scale subarea corresponding to the focusing position matched with the object distance, wherein the shot object mark is used for indicating that a shot object exists at the corresponding focusing position. Wherein the subject identification includes a point cloud identification.

In some embodiments, the presentation interface includes an image display area for displaying the image captured by the lens, the scale image area being located on one side of the image display area.

In some embodiments, the in-focus position indication mark comprises an arrowed line capable of overlaying the subject mark, the arrowed line pointing to the scale sub-area.

In some embodiments, the focusing method may further adjust the focus position indication identifier from a scale sub-area corresponding to the first scale identifier to a scale sub-area corresponding to the second scale identifier according to the current rotation position. So that the user observes the focusing process.

In some embodiments, the presentation interface further comprises a focus position adjustment control image area; the focusing method further comprises the following steps: responding to a control gesture of a user in the focusing position adjusting control image area, and determining the adjusting quantity of the focusing position; and adjusting the focusing position of the lens according to the adjustment quantity.

Note that, in the focusing method of the automatic lens shown in fig. 13, the first correspondence determination method shown in fig. 11 may be used, and in the case of the focusing method of the manual lens, the second correspondence between the rotational position of the motor of the focus following device and the focusing parameter of the focus following motor may be used, and the second correspondence determination method shown in fig. 12 may be used.

According to the embodiment, the automatic lens has the manual focusing function through focusing equipment, so that the automatic lens meets the habit of film shooting, meanwhile, the focusing experience based on a graduated scale and a distance sense is provided, therefore, the automatic lens meets the shooting requirement of the film industry, and more equipment choices are provided for a user during film shooting.

Referring to fig. 14, fig. 14 shows a step flow of a method for controlling a lens according to the present application, and the method may be applied to any of the following-focus devices or the bearing apparatus according to the embodiments of the present application. The bearing device comprises a bearing part, wherein the bearing part is used for bearing the lens. The control method of the lens provided in the embodiment is based on the scale image area to control the lens.

The lens may be a manual lens or an automatic lens. The manual lens realizes focus following by using a focus following motor, the automatic lens comprises a driving component and an information receiver, the information receiver is used for receiving focusing parameters, and the driving component is used for responding to the focusing parameters and driving an optical element of the automatic lens to move so as to change a focusing position.

As shown in fig. 14, the control method of the lens includes steps S501 to S502.

S501, displaying a graduated scale image area on a display interface corresponding to the lens.

S502, acquiring the current focusing position of the lens;

s503, determining a target scale subarea in the plurality of scale subareas according to the current focusing position;

s504, displaying the focus position indication mark on the target scale subarea.

The scale image area comprises a plurality of scale sub-areas, each scale sub-area is provided with a scale mark, and the scale marks positioned on different scale sub-areas are used for indicating different focusing positions of the lens.

Specifically, an object distance representation of the current in-focus position of the lens from the subject measured by the ranging device to the lens is obtained. For example, the current focusing position of the lens is 8 feet, wherein the focusing position is 8 feet, the focusing position is determined by a user operating focusing equipment and utilizing a first corresponding relation or a second corresponding relation, the target focusing parameter is sent to the lens, and the lens drives an optical element of the lens to move according to the target focusing parameter, so that the focusing position is obtained. The first corresponding relation corresponds to an automatic lens, and the second corresponding relation corresponds to a manual lens.

After the current focusing position of the lens is 8 feet, determining a target scale subarea in the plurality of scale subareas according to the current focusing position, wherein the target scale subarea is a region corresponding to 8 feet of scale marks, and displaying a focusing position indication mark, such as a straight line with an arrow shown in fig. 9, in the target scale subarea.

In some embodiments, the lens is in communication with a focus-following device; the control method of the lens can also obtain the current rotation position of the rotation part of the follow-up equipment; and adjusting the focusing position of the lens according to the current rotation position. Specifically, the focus position indication mark can be adjusted from the scale subarea corresponding to the first scale mark to the scale subarea corresponding to the second scale mark according to the current rotation position.

Corresponding to the manual lens, the optical element of the manual lens is driven by a focus following motor, so that the focus position of the lens is adjusted according to the current rotation position specifically comprises: acquiring a second corresponding relation, wherein the second corresponding relation is a corresponding relation between the rotation position of the rotation part of the focus following equipment and the focusing parameter of the focus following motor; determining a target focusing parameter of the focus following motor according to the current rotation position based on the second corresponding relation; and sending the target focusing parameters to the focus tracking motor so that the focus tracking motor drives the optical element according to the target focusing parameters to adjust the focusing position of the lens.

In some embodiments, the tracking device is connected to the tracking motor based on wired and/or wireless communication; and the focus tracking equipment sends the target focusing parameters to the focus tracking motor through the wired and/or wireless communication connection.

It should be noted that, the determination of the second correspondence relationship may be determined by using the determination method shown in fig. 12, which is not described in detail herein.

According to the focusing method of the lens, the control method of the lens and the calibration method of the graduated scale, the automatic lens can be brought into the traditional film and television shooting industry with the advantages of high efficiency, low cost and the like, the equipment selection range of film and television shooting is enlarged, meanwhile, the original user of the automatic lens can experience the use experience of film creation, a better focus tracking tool is provided, and the automatic focusing based on phase and contrast detection is not excessively relied.

Referring to fig. 15, fig. 15 is a schematic block diagram of a control device according to an embodiment of the present application. As shown in fig. 15, the control device 600 further includes one or more processors 601 and a memory 602.

The processor 601 may be, for example, a Micro-controller Unit (MCU), a central processing Unit (Central Processing Unit, CPU), a digital signal processor (Digital Signal Procesor, DSP), or the like.

The Memory 602 may be a Flash chip, a Read-Only Memory (ROM) disk, an optical disk, a U-disk, a removable hard disk, or the like.

Wherein the memory 602 is used to store a computer program; the processor 601 is configured to execute the computer program and execute the control method of the lens, the focusing method of the lens, the scale calibration method, the first correspondence determining method, or the second correspondence determining method according to any one of the above when executing the computer program.

The processor is for example adapted to run a computer program stored in a memory and to implement the following steps when executing the computer program:

acquiring a current rotation position of a rotation part of a focus following device, wherein the focus following device comprises an operation part for a user to operate, and the operation part is mechanically coupled with the rotation part; acquiring a first corresponding relation, wherein the first corresponding relation is a corresponding relation between a rotating position of the rotating part of the focus following equipment and a focusing parameter of a driving part of the lens; determining a target focusing parameter of a driving part of the lens according to the current rotation position based on the first corresponding relation; the target focusing parameters are sent to the information receiver of the lens, so that the driving component of the lens drives the optical element according to the target focusing parameters.

displaying a graduated scale image area on a display interface corresponding to a lens, wherein the graduated scale image area comprises a plurality of graduated sub-areas, each graduated sub-area is provided with a graduated mark, and the graduated marks positioned on different graduated sub-areas are used for indicating different focusing positions of the lens; acquiring the current focusing position of the lens; determining a target scale subarea in the plurality of scale subareas according to the current focusing position; and displaying a focus position indication mark on the target scale subarea.

acquiring at least two marking points, wherein each marking point comprises a rotation position of a rotation part of a motor of the focus following equipment and a focus position corresponding to a lens at the rotation position; determining the corresponding relation between the rotation position of the motor of the focus following device and the focus closing position according to the at least two marking points; and generating a graduated scale image area of the lens according to the corresponding relation, wherein the graduated scale image area comprises a plurality of graduated sub-areas, each graduated sub-area is provided with a graduated mark, and the graduated marks positioned in different graduated sub-areas are used for indicating different focusing positions of the lens.

The control device of the embodiment of the present application has similar technical effects to the focusing method of the lens, the control method of the lens and the calibration method of the scale provided in the above embodiments, and therefore, will not be described herein.

Wherein, the control device can be integrated in the focus following equipment; or integrated with the bearing device to be in communication connection with the following focus device and capable of controlling the following focus device; or a separate electronic device, in communication with the tracking device and capable of controlling the tracking device, the specific form of which is not specifically limited herein.

Referring to fig. 16, fig. 16 is a schematic block diagram of a tracking device according to an embodiment of the present application. As shown in fig. 16, the heel focus device 100 further comprises one or more processors 101 and a memory 102.

The processor 101 may be, for example, a Micro-controller Unit (MCU), a central processing Unit (Central Processing Unit, CPU), a digital signal processor (Digital Signal Procesor, DSP), or the like.

The Memory 102 may be a Flash chip, a Read-Only Memory (ROM) disk, an optical disk, a U-disk, a removable hard disk, or the like.

Wherein the memory 102 is used for storing a computer program; the processor 101 is configured to execute the computer program and execute the control method of the lens, the focusing method of the lens, the scale calibration method, the first correspondence determining method, or the second correspondence determining method according to any one of the above when executing the computer program.

acquiring at least two marking points, wherein each marking point comprises a rotation position of a rotating part of a motor of the focus following equipment and a focus position corresponding to a lens at the rotation position; determining the corresponding relation between the rotation position of the motor of the focus following device and the focus closing position according to the at least two marking points; and generating a graduated scale image area of the lens according to the corresponding relation, wherein the graduated scale image area comprises a plurality of graduated sub-areas, each graduated sub-area is provided with a graduated mark, and the graduated marks positioned in different graduated sub-areas are used for indicating different focusing positions of the lens.

The focus following device of the embodiment of the present application has similar technical effects to the focusing method of the lens, the control method of the lens, and the calibration method of the scale provided in the foregoing embodiments, and therefore, will not be described herein.

Referring to fig. 17, fig. 17 is a schematic block diagram of a control device according to an embodiment of the present application. As shown in fig. 17, the carrier 700 further includes one or more processors 701 and a memory 702.

The processor 701 may be, for example, a Micro-controller Unit (MCU), a central processing Unit (Central Processing Unit, CPU), a digital signal processor (Digital Signal Procesor, DSP), or the like.

The Memory 702 may be a Flash chip, a Read-Only Memory (ROM) disk, an optical disk, a U-disk, a removable hard disk, or the like.

Wherein the memory 702 is used to store a computer program; the processor 701 is configured to execute the computer program and execute the control method of the lens, the focusing method of the lens, the scale calibration method, the first correspondence determining method, or the second correspondence determining method according to any one of the above when executing the computer program.

The bearing device of the embodiment of the present application has similar technical effects to the focusing method of the lens, the control method of the lens and the calibration method of the scale provided in the foregoing embodiments, and therefore, will not be described herein.

An embodiment of the present application further provides a computer readable storage medium, where a computer program is stored, where the computer program includes program instructions, and the processor executes the program instructions to implement the steps of the method for controlling a lens provided in any one of the foregoing embodiments.

The computer readable storage medium may be an internal storage unit of the tracking device according to any of the foregoing embodiments, for example, a memory or a storage of the tracking device. The computer readable storage medium may also be an external storage device of the focus tracking device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the focus tracking device.

While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A focusing method of a lens, characterized in that the lens comprises a driving part and an information receiver;

the information receiver is used for receiving focusing parameters;

the driving component is used for responding to the focusing parameter and driving the optical element of the lens to move so as to change the focusing position;

the method comprises the following steps:

acquiring a current rotation position of a rotation part of a focus following device, wherein the focus following device comprises an operation part for a user to operate, and the operation part is mechanically coupled with the rotation part;

acquiring a first corresponding relation, wherein the first corresponding relation is a corresponding relation between a rotating position of the rotating part of the focus following equipment and a focusing parameter of a driving part of the lens;

determining a target focusing parameter of a driving part of the lens according to the current rotation position based on the first corresponding relation;

the target focusing parameters are sent to the information receiver of the lens, so that the driving component of the lens drives the optical element according to the target focusing parameters.
The method of claim 1, wherein the lens is mounted to a carrier, the information receiver of the lens establishing a communication connection with the carrier;

The target focusing parameter is sent to the information receiver by the bearing device.
The method according to claim 2, wherein the carrier device comprises a carrier portion provided with contacts; the lens is arranged on the bearing part, and the information receiver of the lens is in communication connection with the bearing device through the contact.
The method of claim 2, wherein the heel focus device is communicatively coupled to the carrier;

the bearing device obtains the current rotation position of the rotation part of the focus following equipment, and obtains the target focusing parameter based on the first corresponding relation; or alternatively, the first and second heat exchangers may be,

and the focus tracking equipment obtains the target focusing parameters according to the current rotation position and based on the first corresponding relation.
The method of claim 1, wherein the tracking device is connected to the information receiver of the lens based on wired and/or wireless communication;

and the focus following equipment sends the target focusing parameters to the information receiver of the lens through the wired and/or wireless communication connection.
The method according to claim 1, wherein the method further comprises:

Acquiring a first mapping relation between a rotation position of a motor of a focus following device and a focusing position of the lens;

acquiring a second mapping relation between focusing parameters of a driving part of the lens and the focusing position of the lens;

and determining the first corresponding relation according to the first mapping relation and the second mapping relation.
The method of claim 6, wherein the in-focus position of the lens is determined based on an object distance of the object under test to the lens.
The method of claim 7, wherein the object distance from the object to be measured to the lens is measured by a measuring device, the measuring device being arranged on the carrier device or the lens.
The method according to claim 6, characterized in that the method comprises:

acquiring at least two first mark points, and determining the first mapping relation according to the at least two first mark points; wherein each first mark point comprises a rotation position of a rotation part of a motor of the focus following device and a corresponding object distance at the rotation position.
The method of claim 9, wherein the obtaining at least two first marker points, and determining the first mapping relationship according to the at least two first marker points, comprises:

Acquiring a first rotating position of a rotating part of a motor of a focus following device and a first object distance corresponding to the first rotating position, wherein the first rotating position can enable the lens to focus at infinity, and the first object distance is infinity when the lens is focused at infinity;

acquiring a second rotation position of a rotation part of a motor of a focus following device and a second object distance corresponding to the second rotation position, wherein the second rotation position can enable the lens to focus on a target measured object in a view finding range, and the second object distance is an object distance from the target measured object to the lens;

and determining the first mapping relation according to the first rotating position and the first object distance, and the second rotating position and the second object distance.
The method according to claim 6, characterized in that the method comprises:

acquiring at least two second mark points, and determining the second mapping relation according to the at least two second mark points; each second mark point comprises a focusing parameter of a driving component of the lens and a corresponding object distance under the focusing parameter.
The method of claim 11, wherein the obtaining at least two second marker points, and determining the second mapping relationship according to the at least two second marker points, comprises:

Acquiring a first focusing parameter of a driving component of the lens and a third object distance corresponding to the first focusing parameter, wherein the first focusing parameter can enable the lens to focus at infinity, and the third object distance is infinity when the lens focuses at infinity;

acquiring a second focusing parameter of a driving component of the lens and a fourth object distance corresponding to the second focusing parameter, wherein the second focusing parameter can enable the lens to focus on a target measured object in a view finding range, and the fourth object distance is the object distance from the target measured object to the lens;

and determining the second mapping relation according to the first focusing parameter, the third object distance, the second focusing parameter and the fourth object distance.
The method according to any one of claims 1-12, further comprising:

displaying a graduated scale image area on a display interface corresponding to a lens, wherein the graduated scale image area comprises a plurality of graduated sub-areas, each graduated sub-area is provided with a graduated mark, and the graduated marks positioned on different graduated sub-areas are used for indicating different focusing positions of the lens;

Acquiring the current focusing position of the lens;

determining a target scale subarea in the plurality of scale subareas according to the current focusing position;

and displaying a focus position indication mark on the target scale subarea.
The method of claim 13, wherein each scale mark is used for indicating a focus position of the lens, and a plurality of scale marks comprise: adjacent first scale marks and second scale marks, and adjacent third scale marks and fourth scale marks;

the difference between the first scale mark and the second scale mark is Jiao Weizhi, the difference between the third scale mark and the fourth scale mark is Jiao Weizhi, the difference between the first focus position difference and the second focus position difference is the same, and the pixel distance of the first focus position difference corresponding to the display interface is different from the pixel distance of the first focus position difference corresponding to the display interface.
The method of claim 13, wherein each scale mark is used for indicating a focus position of the lens, and a plurality of scale marks comprise: the first scale mark, the second scale mark, the third scale mark and the fourth scale mark; the first scale mark and the second scale mark are spaced at a first pixel distance of the display interface, and the third scale mark and the fourth scale mark are spaced at a second pixel distance of the display interface; the combination Jiao Weizhi indicated by the first scale mark and the second scale mark differ by a first focus position difference value, and the combination Jiao Weizhi indicated by the third scale mark and the fourth scale mark differ by a second focus position difference value;

Wherein a first ratio of the first focus position difference to the first pixel distance is different from a second ratio of the second focus position difference to the second pixel distance.
The method of claim 15, wherein the first scale mark and the second scale mark are spaced apart from the display interface by a first pixel distance, the first pixel distance being positively correlated with a target rotational range of an operating component of the follow-up device, the target rotational range being a range of rotation corresponding to the operating component of the follow-up device when the lens is adjusted from a first focus position corresponding to the first scale mark to a second focus position corresponding to the second scale mark.
The method of claim 13, wherein the method further comprises:

acquiring the object distance between an object in the view finding range of the lens and the lens;

determining a focus position matching the object distance;

and displaying a shot object mark at the scale subarea corresponding to the focusing position matched with the object distance, wherein the shot object mark is used for indicating that a shot object exists at the corresponding focusing position.
The method of claim 17, wherein the subject identification comprises a point cloud identification.
The method of claim 17, wherein the presentation interface includes an image display area for displaying the lens captured image, the scale image area being located on one side of the image display area.
The method of claim 19, wherein the in-focus position indication mark comprises an arrowed line capable of covering the subject mark, the arrowed line pointing to the scale sub-area.
The method of claim 15, wherein the method further comprises:

and according to the current rotation position, adjusting the focusing position indication mark from the scale subarea corresponding to the first scale mark to the scale subarea corresponding to the second scale mark.
The method of claim 13, wherein the presentation interface further comprises a focus position adjustment control image area; the method further comprises the steps of:

responding to a control gesture of a user in the focusing position adjusting control image area, and determining the adjusting quantity of the focusing position;

and adjusting the focusing position of the lens according to the adjustment quantity.
A method for controlling a lens, the method comprising:

displaying a graduated scale image area on a display interface corresponding to a lens, wherein the graduated scale image area comprises a plurality of graduated sub-areas, each graduated sub-area is provided with a graduated mark, and the graduated marks positioned on different graduated sub-areas are used for indicating different focusing positions of the lens;

acquiring the current focusing position of the lens;

determining a target scale subarea in the plurality of scale subareas according to the current focusing position;

and displaying a focus position indication mark on the target scale subarea.
The method of claim 23, wherein each of the scale markings is for indicating a focus position of the lens, the plurality of scale markings comprising: adjacent first scale marks and second scale marks, and adjacent third scale marks and fourth scale marks;

the difference between the first scale mark and the second scale mark is Jiao Weizhi, the difference between the third scale mark and the fourth scale mark is Jiao Weizhi, the difference between the first focus position difference and the second focus position difference is the same, and the pixel distance of the first focus position difference corresponding to the display interface is different from the pixel distance of the first focus position difference corresponding to the display interface.
The method of claim 23, wherein each of the scale markings is for indicating a focus position of the lens, the plurality of scale markings comprising: the display device comprises a first scale mark, a second scale mark, a third scale mark and a fourth scale mark, wherein the first scale mark and the second scale mark are spaced at a first pixel distance of the display interface, and the third scale mark and the fourth scale mark are spaced at a second pixel distance of the display interface; the combination Jiao Weizhi indicated by the first scale mark and the second scale mark differ by a first focus position difference value, and the combination Jiao Weizhi indicated by the third scale mark and the fourth scale mark differ by a second focus position difference value;

wherein a first ratio of the first focus position difference to the first pixel distance is different from a second ratio of the second focus position difference to the second pixel distance.
The method of claim 25, wherein the first scale mark and the second scale mark are spaced apart from the display interface by a first pixel distance, the first pixel distance being positively correlated with a target rotational range of an operating member of a follow-up device, the target rotational range being a range of rotation corresponding to the operating member of the follow-up device when the lens is adjusted from a first focus position corresponding to the first scale mark to a second focus position corresponding to the second scale mark.
The method of claim 23, wherein the method further comprises:

acquiring the object distance between an object in the view finding range of the lens and the lens;

determining a focus position matching the object distance;

and displaying a shot object mark at the scale subarea corresponding to the focusing position matched with the object distance, wherein the shot object mark is used for indicating that a shot object exists at the corresponding focusing position.
The method of claim 27, wherein the subject identification comprises a point cloud identification.
The method of claim 27, wherein the presentation interface includes an image display area for displaying the lens captured image, the scale image area being located on one side of the image display area.
The method of claim 29, wherein the in-focus position indication indicator comprises an arrowed line capable of covering the subject indicator, the arrowed line pointing to the scale sub-region.
The method of any of claims 23-30, wherein the lens is communicatively coupled to a follow focus device; the method further comprises the steps of:

Acquiring a current rotation position of a rotation part of a focus following device, wherein the focus following device comprises an operation part for a user to operate, and the operation part is mechanically coupled with the rotation part;

and adjusting the focusing position of the lens according to the current rotation position.
The method of claim 31, further comprising:

and according to the current rotation position, adjusting the focusing position indication mark from the scale subarea corresponding to the first scale mark to the scale subarea corresponding to the second scale mark.
The method of claim 31, wherein adjusting the in-focus position of the lens according to the current rotational position comprises:

acquiring a second corresponding relation, wherein the second corresponding relation is a corresponding relation between the rotation position of the rotation part of the focus following equipment and focusing parameters of a focus following motor, the focus following motor and the lens are arranged on a bearing device, and the focus following motor is used for driving optical elements of the lens to move;

determining a target focusing parameter of the focus following motor according to the current rotation position based on the second corresponding relation;

And sending the target focusing parameters to the focus tracking motor so that the focus tracking motor drives the optical element according to the target focusing parameters to adjust the focusing position of the lens.
The method of claim 33, wherein the tracking device is connected to the tracking motor based on wired and/or wireless communication;

and the focus tracking equipment sends the target focusing parameters to the focus tracking motor through the wired and/or wireless communication connection.
The method of claim 33, wherein the method further comprises:

acquiring a first mapping relation between a rotation position of a motor of a focus following device and a focusing position of the lens;

acquiring a third mapping relation between focusing parameters of the focus following motor and the focusing position of the lens;

and determining the second corresponding relation according to the first mapping relation and the third mapping relation.
The method of claim 35, wherein the in-focus position of the lens is determined based on an object distance of the object under test to the lens.
The method of claim 36, wherein the object distance from the object to be measured to the lens is measured by a measuring device, the measuring device being arranged on the carrier device or the lens.
The method according to claim 35, characterized in that the method comprises:

acquiring at least two first mark points, and determining the first mapping relation according to the at least two first mark points; wherein each first mark point comprises a rotation position of a rotation part of a motor of the focus following device and a corresponding object distance at the rotation position.
The method of claim 38, wherein the obtaining at least two first marker points, and determining the first mapping relationship according to the at least two first marker points, comprises:

acquiring a first rotating position of a rotating part of a motor of a focus following device and a first object distance corresponding to the first rotating position, wherein the first rotating position can enable the lens to focus at infinity, and the first object distance is infinity when the lens is focused at infinity;

acquiring a second rotation position of a rotation part of a motor of a focus following device and a second object distance corresponding to the second rotation position, wherein the second rotation position can enable the lens to focus on a target measured object in a view finding range, and the second object distance is an object distance from the target measured object to the lens;

And determining the first mapping relation according to the first rotating position and the first object distance, and the second rotating position and the second object distance.
The method according to claim 35, characterized in that the method comprises:

acquiring at least two third mark points, and determining the third mapping relation according to the at least two third mark points; each third mark point comprises a focusing parameter of the follow-focus motor and a corresponding object distance under the focusing parameter.
The method of claim 40, wherein the obtaining at least two third mark points, and determining the third mapping relationship according to the at least two third mark points, comprises:

acquiring a first focusing parameter of the focus following motor and a fifth object distance corresponding to the first focusing parameter, wherein the first focusing parameter can enable the lens to focus at infinity, and the fifth object distance is infinity when the lens focuses at infinity;

acquiring a second focusing parameter of the focus following motor and a sixth object distance corresponding to the second focusing parameter, wherein the second focusing parameter can enable the lens to focus on a target measured object in a view finding range, and the sixth object distance is an object distance from the target measured object to the lens;

And determining the third mapping relation according to the first focusing parameter and the fifth object distance, and the second focusing parameter and the sixth object distance.
The method of claim 23, wherein the presentation interface further comprises a focus position adjustment control image area; the method further comprises the steps of:

responding to a control gesture of a user in the focusing position adjusting control image area, and determining the adjusting quantity of the focusing position;

and adjusting the focusing position of the lens according to the adjustment quantity.
A method of scale calibration, the method comprising:

acquiring at least two marking points, wherein each marking point comprises a rotation position of a rotation part of a motor of the focus following equipment and a focus position corresponding to a lens at the rotation position;

determining the corresponding relation between the rotation position of the motor of the focus following device and the focus closing position according to the at least two marking points;

and generating a graduated scale image area of the lens according to the corresponding relation, wherein the graduated scale image area comprises a plurality of graduated sub-areas, each graduated sub-area is provided with a graduated mark, and the graduated marks positioned in different graduated sub-areas are used for indicating different focusing positions of the lens.
The method of claim 43, further comprising:

obtaining compensation coefficients corresponding to the lenses, wherein the compensation coefficients corresponding to different lenses are different;

the generating the scale image area of the lens according to the corresponding relation includes: generating a graduated scale image area of the lens according to the corresponding relation and the supplementary coefficient; the compensation coefficient can enable different lenses to correspond to the same graduated scale image area, and a plurality of graduated scale subregions and displayed graduated scale marks included in the same graduated scale image area are the same.
The method of claim 44, wherein the compensation factor is further capable of causing the rotational position of the rotational portion of the motor of the follow focus device to be the same when different ones of the lenses change the same focus position.
The method of claim 43, wherein the method comprises:

acquiring a first rotation position of a rotation part of a motor of a focus following device and a first focusing position of the lens at the first rotation position, wherein the first rotation position can enable the lens to focus at infinity;

Acquiring a second rotation position of a rotation part of a motor of a focus following device and a second focusing position corresponding to the lens under the second rotation position, wherein the second rotation position can enable the lens to focus on a target measured object in a shooting environment;

and determining the corresponding relation between the rotating position of the rotating part of the motor of the follow-up device and the focusing position according to the first rotating position and the first focusing position, and the second rotating position and the second focusing position.
The method of claim 43, wherein the in-focus position of the lens is determined based on an object distance from the object under test to the lens.
The method of claim 47, wherein the object distance from the object to be measured to the lens is measured by a measuring device, the measuring device being disposed on a carrier or the lens.
The method of claim 43, wherein each scale mark is used for indicating one in-focus position of the lens, and a plurality of scale marks comprise: adjacent first scale marks and second scale marks, and adjacent third scale marks and fourth scale marks;

The difference between the first scale mark and the second scale mark is Jiao Weizhi, the difference between the third scale mark and the fourth scale mark is Jiao Weizhi, the difference between the first focus position difference and the second focus position difference is the same, and the pixel distance of the first focus position difference corresponding to the display interface is different from the pixel distance of the first focus position difference corresponding to the display interface.
The method of claim 43, wherein each scale mark is used for indicating one in-focus position of the lens, and a plurality of scale marks comprise: the display device comprises a first scale mark, a second scale mark, a third scale mark and a fourth scale mark, wherein the first scale mark and the second scale mark are spaced at a first pixel distance of the display interface, and the third scale mark and the fourth scale mark are spaced at a second pixel distance of the display interface; the combination Jiao Weizhi indicated by the first scale mark and the second scale mark differ by a first focus position difference value, and the combination Jiao Weizhi indicated by the third scale mark and the fourth scale mark differ by a second focus position difference value;

Wherein a first ratio of the first focus position difference to the first pixel distance is different from a second ratio of the second focus position difference to the second pixel distance.
The method of claim 50, wherein the first scale mark and the second scale mark are spaced apart from the display interface by a first pixel distance, the first pixel distance being positively correlated with a target rotational range of an operating member of a follow-up device, the target rotational range being a range of rotation corresponding to the operating member of the follow-up device when the lens is adjusted from a first focus position corresponding to the first scale mark to a second focus position corresponding to the second scale mark.
The method of claim 43, further comprising:

acquiring the object distance between an object in the view finding range of the lens and the lens;

determining a focus position matching the object distance;

and displaying a focus position indication mark on the scale subarea corresponding to the focus position matched with the object distance.
The method of claim 52, wherein a subject identifier is displayed at the scale sub-region corresponding to a focus position that matches the subject distance, the subject identifier being indicative of a subject being present at the corresponding focus position.
The method of claim 53, wherein the subject identification comprises a point cloud identification.
The method of claim 53, wherein the presentation interface includes an image display area for displaying the lens captured image, the scale image area being located on one side of the image display area.
The method of claim 53, wherein the focus position indication indicator comprises an arrowed line capable of covering the subject indicator, the arrowed line pointing to the graduated sub-region.
The method of claim 43, wherein the presentation interface further comprises a focus position adjustment control image area; the method further comprises the steps of:

responding to a control gesture of a user in the focusing position adjusting control image area, and determining the adjusting quantity of the focusing position;

and adjusting the focusing position of the lens according to the adjustment quantity.
A control device, characterized in that the control device comprises a processor and a memory;

the memory is used for storing a computer program;

the processor is configured to execute the computer program and implement the focusing method of the lens according to any one of claims 1 to 22, the control method of the lens according to any one of claims 23 to 42, or the calibration method of the scale according to any one of claims 43 to 57 when the computer program is executed.
A heel focus apparatus, the heel focus apparatus comprising:

a motor;

an operation part for inputting a focus control signal for a user to operate, the operation part being mechanically coupled with the rotating part of the motor and capable of driving the rotating part of the motor to rotate together;

the driving circuit is connected with the motor and used for driving the motor to rotate;

the main control circuit is connected with the driving circuit and is used for controlling the rotation part of the motor to rotate through the driving circuit;

the main control circuit comprises a processor and a memory;

the memory is used for storing a computer program;

the processor is configured to execute the computer program and implement the focusing method of the lens according to any one of claims 1 to 22, the control method of the lens according to any one of claims 23 to 42, or the calibration method of the scale according to any one of claims 43 to 57 when the computer program is executed.
The bearing device is characterized by comprising a bearing part, wherein the bearing part is used for bearing a lens, and the bearing device further comprises a processor and a memory;

The memory is used for storing a computer program;

the processor is configured to execute the computer program and implement the focusing method of the lens according to any one of claims 1 to 22, the control method of the lens according to any one of claims 23 to 42, or the calibration method of the scale according to any one of claims 43 to 57 when the computer program is executed.
The carrier as recited in claim 60, wherein said carrier is provided with contacts; the lens is arranged on the bearing part and is in communication connection with the bearing device through the contact.
A focus tracking system comprising a lens and a focus tracking device of claim 59 for controlling the lens to track focus, the lens comprising a manual lens or an automatic lens.
A heel focus system comprising a lens, a carrier, and the heel focus apparatus of claim 59; the bearing device comprises a bearing part, the bearing part is used for bearing the lens, the focus following equipment is used for controlling the lens to follow focus, and the lens comprises a manual lens or an automatic lens.
A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, which when executed by a processor causes the processor to implement a method of focusing a lens according to any one of claims 1 to 22, or to implement a method of controlling a lens according to any one of claims 23 to 42, or to implement a method of calibrating a scale according to any one of claims 43 to 57.