CN111464742B

CN111464742B - Imaging system and method capable of continuously photographing without causing motion blur

Info

Publication number: CN111464742B
Application number: CN202010272354.7A
Authority: CN
Inventors: 苑杰; 徐维超; 彭斌; 冯永生
Original assignee: Zhongshan Yimeijie Intelligent Technology Co ltd
Current assignee: Zhongshan Yimeijie Intelligent Technology Co ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2022-03-22
Anticipated expiration: 2040-04-09
Also published as: CN111464742A

Abstract

The invention discloses an imaging system and method for continuous photographing without motion blur, comprising: a CCD imaging device capable of determining whether there is relative motion between the image sensor and the subject during acquisition of the sequence of focal plane images; the stepping motor is used for focusing the CCD lens; a counter capable of introducing a SUBCK signal and setting the number of movement steps of the stepping motor; the control switch can drive the stepping motor to work, the control switch receives data of the counter and is controlled by the SUBCK to work, and according to the structure, exposure time at the photographing time does not need to be reduced, and certain pass energy is guaranteed; the step motor is informed through the working time sequence characteristics of the imaging device, so that an additional step motor controller is omitted, and an imaging structure is simplified; through a simple structure, the effect of avoiding motion blur can be achieved without complex algorithm intervention.

Description

Imaging system and method capable of continuously photographing without causing motion blur

Technical Field

The invention relates to the technical field of motion imaging systems, in particular to an imaging system and method capable of continuously photographing without motion blur.

Background

The high-resolution image is widely applied to various fields such as reconnaissance, disaster relief, geographic information systems, digital cities, road construction and the like, has important practical significance, and particularly has higher requirements on the resolution of the image in the fields such as satellite imaging and aviation reconnaissance imaging. Relative motion exists between the imaging device and a target object in the exposure time, image motion is generated on an image surface to cause blurring, and the spatial resolution of an image is reduced.

In essence, to solve the problem of motion blur in imaging, it is necessary to make the exposure time sufficiently short, or to completely eliminate the relative motion between the sensor and the subject to be photographed during exposure. However, in order to ensure a certain light energy, the exposure time cannot be infinitely small in practical imaging, and relative motion is inevitable because the camera always works in motion in some scenes.

Disclosure of Invention

The invention aims to provide an imaging system and method for continuous photographing without causing motion blur, which are technically characterized in that a SUBCK signal in a CCD time sequence is utilized to be similar to a PUL signal of a stepping motor, and the SUBCK is used for indirectly controlling the stepping motor, so that the CCD can be imaged in the SUBCK period during any motion period, and the motion blur can not be caused.

In order to achieve the purpose, the invention adopts the following scheme:

an imaging system for continuous photographing without causing motion blur, comprising:

a CCD imaging device capable of determining whether there is relative motion between the image sensor and the subject during acquisition of the sequence of focal plane images;

the stepping motor is used for focusing the CCD lens;

a counter capable of introducing a SUBCK signal and setting the number of movement steps of the stepping motor;

and the control switch can drive the stepping motor to work, receives the data of the counter and is controlled to work by the SUBCK.

According to the structure, the exposure time at the photographing time does not need to be reduced, and certain customs energy is ensured; the step motor is informed through the working time sequence characteristics of the imaging device, so that an additional step motor controller is omitted, and an imaging structure is simplified; through a simple structure, the effect of avoiding motion blur can be achieved without complex algorithm intervention.

Preferably, one or more of a gyroscope, accelerometer, magnetometer or electromagnetic coil is also included.

Preferably, the SUBCK signal is similar to the PUL signal of the stepper motor.

Preferably, the counter is a down counter.

Preferably, the control switch is connected with a PUL end of the stepping motor.

An imaging method for continuous photographing without causing motion blur, comprising the steps of:

a: determining, by the CCD imaging device, whether there is relative motion between the image sensor and the subject during acquisition of the sequence of focal plane images;

b: after the relative movement is determined, directing the SUBCK signal to a counter and a control switch controlled by the SUBCK;

c: setting the number of the movement steps of the stepping motor through a counter;

d: the control switch is connected with the stepping motor and reads the movement steps of the counter;

e: through the work of the stepping motor, when the stepping motor works, the user walks randomly in the SUBCK existence period, and the motion blur cannot be caused.

Preferably, the SUBCK signal in step B is similar to the PUL signal of the stepper motor.

Preferably, the counter is a down counter.

In summary, compared with the prior art, the invention has the beneficial effects that:

compared with the prior art, the imaging system and the method for continuous shooting without causing motion blur have the advantages that the imaging blur caused by relative motion between the image sensor and the shooting object in the continuous shooting period of the imaging system can be effectively inhibited; the characteristic that motion blur can not be generated during the existence of the SUBCK is utilized, the SUBCK signal is led to a downward counter and a switch controlled by the downward counter, the counter is set as the motion step number of the motor, and the control switch is connected to the PUL end of the stepping motor driver, so that motion blur can not be caused during the existence of the SUBCK when the SUBCK is walked at will, and further a stepping motor controller can be omitted, so that the imaging system is simple in structure, and is more efficient, economic and accurate in shooting objects.

Drawings

FIG. 1 is a diagram illustrating a typical timing sequence of a CCD according to the present invention.

Fig. 2 is a schematic diagram of an exemplary SUBCK according to the present invention.

Fig. 3 is a schematic flow diagram of an imaging system of the present invention.

Detailed Description

The invention will be further described with reference to the following description and embodiments in conjunction with the accompanying drawings:

the stepping motor is used for focusing the CCD lens;

Referring to fig. 1, a typical timing sequence of a CCD device can be divided into two processes of exposure and output; the exposure process is a process of collecting photocharge, and converts the intensity signal of light into an electric signal, wherein the process needs to ensure that the electric charge of the photosensitive region is not transferred and maintain the potential well voltage of the pixel without changing the driving level; the output process includes two parts of time sequence of vertical transfer and horizontal transfer of pixels; the control signal of the photosensitive area comprises two driving clocks of V1 and V2, and V1 and V2 can keep the level when exposing under the condition of normal time sequence driving, and the level is not changed; the pixels that need to transfer a photosensitive area at the output are in time sequence a set of V pulses, and thus are in effect a periodic sequence of V pulses of the vertical transfer clock with an added time delay.

After SUBCK, VSG is preceded by exposure time, and relative motion between the image sensor and the shooting object is a cause of motion blur at the moment; no motion blur is generated before exposure, i.e. during the presence of the SUBCK.

Referring to fig. 2, it can be found that the control timing is similar to that of the PUL signal of the stepping motor, according to the characteristic, the SUBCK signal is led to a down counter and a switch controlled by the down counter, the counter is set as the number of the moving steps of the motor, and the switch is connected to the PUL end of the driver of the stepping motor, so that the effect of controlling the stepping motor by the SUBCK is achieved, and any walking is not caused with motion blur during the existence of the SUBCK; in addition, the SUBCK is used for controlling the stepping motor, an additional stepping motor controller can be omitted, and the size of the imaging system can be effectively controlled.

In order to further judge whether the shooting device is in a motion state, one or more gyroscopes, accelerometers, magnetometers or electromagnetic coils can be arranged, and then whether the shooting device is in the motion state can be judged more accurately.

Referring to fig. 1 to 3, an imaging method for continuous photographing without causing motion blur includes the steps of:

The invention also comprises one or more gyroscopes, accelerometers, magnetometers or electromagnetic coils, so that whether the shooting device is in a motion state can be judged more accurately.

In the present invention, the SUBCK signal in step B is similar to the PUL signal of the stepping motor.

In the present invention, the counter is a down counter.

In the invention, the control switch is connected with the PUL end of the stepping motor.

The method comprises the following specific operation steps:

the shooting device can receive a shooting operation instruction, and judge whether the shooting device is in a motion state or not by means of a gyroscope and other devices according to the shooting operation instruction; if the photographing system is not in a motion state, exposing and imaging according to a normal working time sequence; if the system is judged to move in the shooting device, the CCD time sequence SUBCK is used for controlling the stepping motor, so that motion blur cannot be caused when any walking is shot in the period of the SUBCK; in more detail, the SUBCK signal is directed to a down counter set to the number of steps of the motor's movement and a switch controlled thereby, which is connected to the PUL terminal of the stepper motor driver, thereby driving the stepper motor, so that the imaging system images during the presence of SUBCK without causing image blur due to movement.

The global shutter image sensor is mainly a CCD sensor, when a time sequence generator of the global shutter image sensor comprises a standard signal SUBCK, accumulated charges in a potential well (potential well) are neutralized, relative motion between a camera and a shooting object does not cause image blurring at the moment, the SUBCK is a square wave with controllable quantity, is completely consistent with a stepping control signal of a stepping motor, and is connected into a counter, the counter sets the number of pulses needing mechanical mechanism walking, the output of the counter is compared with the original SUBCK, and then is input into a driver of the stepping motor, so that the whole shooting process moves and shoots according to natural instructions, the motion blurring cannot be caused during the existence period of the SUBCK when the camera walks randomly, and further a controller of the stepping motor can be omitted.

While there have been shown and described the fundamental principles and principal features of the invention and advantages thereof, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are given by way of illustration of the principles of the invention, but is susceptible to various changes and modifications without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An imaging system for continuous photographing without motion blur, comprising:

the stepping motor is used for focusing the CCD lens;

the control switch can drive the stepping motor to work, receives data of the counter and is controlled by the SUBCK to work;

one or more of a gyroscope, an accelerometer, a magnetometer or an electromagnetic coil is also included;

when the standard signal SUBCK number of the time sequence generator exists, accumulated charges in the potential well are neutralized, relative movement between a camera and a shooting object does not cause image blurring, the SUBCK is a square wave with controllable quantity and is completely consistent with a stepping control signal of a stepping motor, the signal is connected into a counter, the number of pulses needing walking of a mechanical mechanism is set by the counter, the output of the counter is input into a driver of the stepping motor after being 'AND' compared with the original SUBCK, the whole shooting process moves and shoots according to natural instructions, and the movement blurring cannot be caused during the existence period of the SUBCK when the SUBCK walks randomly.

2. An imaging system for continuous shooting without motion blur as in claim 1 wherein the SUBCK signal is similar to the PUL signal of the stepper motor.

3. The imaging system of claim 1, wherein said counter is a down counter.

4. The imaging system of claim 1, wherein said control switch is connected to the PUL terminal of the stepper motor.

5. An imaging method for continuously photographing without causing motion blur, comprising the steps of:

e: when the stepping motor works, the user walks arbitrarily in the SUBCK existence period during the work, and motion blur cannot be caused; one or more of a gyroscope, an accelerometer, a magnetometer or an electromagnetic coil is also included;

6. An imaging method of continuous photographing without causing motion blur according to claim 5, wherein the SUBCK signal in step B is similar to the PUL signal of the stepping motor.

7. An imaging method of continuous photographing without causing motion blur according to claim 5, wherein the counter is a down counter.

8. An imaging method according to claim 5, wherein said control switch is connected to a PUL terminal of a stepping motor.