CN109842763A - A kind of automatic light-supplementing method, system and video camera - Google Patents
A kind of automatic light-supplementing method, system and video camera Download PDFInfo
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Abstract
The application is suitable for field of camera technology, provides a kind of automatic light-supplementing method, system and video camera, wherein when method includes: camera shooting, obtains the picture size of camera distance or object；Wherein, the camera distance is the distance between the object and the video camera；According to the camera distance or described image size, PWM value is obtained；According to the PWM value, the brightness of light compensating lamp is adjusted, to carry out light filling to the object.The application is by when shooting, obtaining PWM value according to camera distance or picture size, and adjust the brightness of light compensating lamp according to PWM value, it can be according to practical camera distance or picture size, the brightness for automatically adjusting light compensating lamp carries out automatic light-supplementing to object, improves image quality.
Description
Technical field
The embodiment of the present invention belongs to field of camera technology more particularly to a kind of automatic light-supplementing method, system and video camera.
Background technique
With the continuous development of camcorder technology, the continuous of various types of video cameras is popularized, and is widely used in security protection prison
Control field, field of broadcast televisions, aerospace field etc..Currently, most of video cameras are equipped with flash lamp, for shot
Object carries out light filling.
However, existing video camera usually can not automatically control flash lamp and carry out to object according to actual photographed situation
Light filling, it will usually because light filling is excessive or light filling is insufficient, cause the brightness of object excessive lightness or darkness, seriously affect into image quality
Amount.
Summary of the invention
The embodiment of the present invention provides a kind of automatic light-supplementing method, system and video camera, can be according to actual photographed situation pair
Object carries out automatic light-supplementing, improves image quality.
The first aspect of the embodiment of the present application provides a kind of automatic light-supplementing method, is applied to video camera, the method packet
It includes:
When camera shooting, the picture size of camera distance or object is obtained；Wherein, the camera distance be the object with
The distance between described video camera；
According to the camera distance or described image size, PWM value is obtained；
According to the PWM value, the brightness of light compensating lamp is adjusted, to carry out light filling to the object.
The second aspect of the embodiment of the present application provides a kind of automatic light-supplementing system, is applied to video camera, the system packet
It includes:
Distance, dimension acquisition module when for imaging, obtain the picture size of camera distance or object；Wherein, described
Camera distance is the distance between the object and the video camera；
PWM value obtains module, for obtaining PWM value according to the camera distance or described image size；
Light filling control module, for the brightness of light compensating lamp being adjusted, to mend to the object according to the PWM value
Light.
The third aspect of the embodiment of the present application provides a kind of video camera, which is characterized in that the video camera includes camera shooting
Module, control module, light compensating lamp drive module and light compensating lamp；
The photographing module and the light compensating lamp drive module are electrically connected with the control module, the light compensating lamp driving
Module is electrically connected with the light compensating lamp；
The photographing module is for imaging；
The control module is used to obtain the picture size of camera distance or object in photographing module camera shooting；
Wherein, the camera distance is the distance between the object and the video camera；
The control module is also used to obtain PWM value according to the camera distance or described image size；
The light compensating lamp drive module is used to adjust the brightness of the light compensating lamp according to the PWM value, to described shot
Object carries out light filling.
The fourth aspect of the embodiment of the present application provides a kind of computer readable storage medium, the computer-readable storage
Media storage has computer program, which is characterized in that any of the above-described institute is realized when the computer program is executed by processor
The step of stating method.
The embodiment of the present application is by when shooting, obtaining PWM value according to camera distance or picture size, and according to PWM value
The brightness for adjusting light compensating lamp, can automatically adjust the brightness of light compensating lamp, to object according to practical camera distance or picture size
Automatic light-supplementing is carried out, image quality is improved.
Detailed description of the invention
It in order to more clearly explain the technical solutions in the embodiments of the present application, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only some of the application
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
The flow diagram for the automatic light-supplementing method that Fig. 1 the embodiment of the present application one provides；
Fig. 2 is the structural schematic diagram for the automatic light-supplementing system that the embodiment of the present application two provides；
Fig. 3 is the structural schematic diagram for the video camera that the embodiment of the present application three provides.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, so as to provide a thorough understanding of the present application embodiment.However, it will be clear to one skilled in the art that there is no these specific
The application also may be implemented in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, so as not to obscure the description of the present application with unnecessary details.
In order to illustrate technical solution described herein, the following is a description of specific embodiments.
Embodiment one
The embodiment of the present invention provides a kind of automatic light-supplementing method, is applied to arbitrarily shoot image or video and band
Have the picture pick-up device of light compensating lamp, for example, security monitoring camera, radio and television video camera, commonness photograph video camera, camera with
And the terminal devices such as mobile phone, tablet computer, personal digital assistant, pc client with camera and light compensating lamp.
As shown in Figure 1, automatic light-supplementing method provided by the present embodiment, comprising:
Step S101: when camera shooting, the picture size of camera distance or object is obtained；Wherein, described in the camera distance
For the distance between object and video camera.
In a particular application, then camera distance specifically can pass through light by the optical zoom multiple of reading video camera
The conversion relation between zoom magnification and camera distance is learned, camera distance is calculated；Camera distance and optical zoom multiple are just
Correlation, i.e. optical zoom multiple is bigger, and camera distance is bigger；It can also be according to changing between optical zoom multiple and picture size
The picture size of object is calculated in calculation relationship；Picture size and optical zoom multiple are negatively correlated, i.e. optical zoom multiple is got over
Small, picture size is bigger.
In a particular application, when shooting, it can only obtain any one in the picture size of camera distance or object
It is a, two can also be obtained simultaneously, is determined with specific reference to actual needs, be more than that current device can be supported most in camera distance
When remote camera distance or the minimum camera distance that can be supported less than current device, it may be considered that only obtain picture size.
In one embodiment, step S101 includes:
When camera shooting, optical zoom multiple is obtained；
According to the optical zoom multiple, the camera distance or described image size are obtained；Wherein, the optical zoom
Multiple is with camera distance positive correlation and negatively correlated with described image size.
In a particular application, camera distance can also be obtained by other means, for example, passing through range sensor to quilt
The form of object transmitting distance measuring signal is taken the photograph, to obtain camera distance.Range sensor can select infrared distance according to actual needs
Sensor, ultrasonic distance sensor, laser distance sensor etc..This method is typically more suitable for object and video camera
The distance between not far situation, theoretically, exclude extraneous factor interference in the case where, even if object is apart from video camera
Farther out, and camera distance can be measured by range sensor, wherein laser distance sensor is swashed due to its transmitting
Optical signal has the characteristics that monochromaticjty is good, high directivity, and the farther away subject that can be applied to adjust the distance carries out ranging.
Step S102: according to the camera distance or described image size, PWM value is obtained.
It in a particular application, can be according to pre-set shooting distance or picture size and PWM ((PulseWidth
Modulation, pulse width modulation) corresponding relationship between value, to obtain PWM corresponding with shooting distance or picture size
Value.In general, be not directly linked between shooting distance or picture size and PWM value, but with the brightness that needs light compensating lamp luminous
It is related, and the brightness of light compensating lamp is can be adjusted by adjusting the output to the size of the PWM value of light filling lamp driver, is exported
PWM to light filling lamp driver is bigger, and light filling lamp driver can be by the brighter of the brightness regulation of light compensating lamp.
In a particular application, PWM value can be obtained according only to one in camera distance or picture size, it can also be same
When obtain two PWM values respectively according to camera distance and picture size, if two PWM values are unequal, take the two PWM
The average value of maximum value, minimum value in value or both.
In one embodiment, step S102 includes:
When getting the shooting distance, according to the first corresponding relationship, it is bright to obtain light filling corresponding with the camera distance
Degree；Wherein, corresponding relationship of first corresponding relationship between camera distance and light filling brightness；
When getting described image size, according to the second corresponding relationship, it is bright to obtain light filling corresponding with described image size
Degree；Wherein, corresponding relationship of second corresponding relationship between picture size and light filling brightness；
According to third corresponding relationship, PWM value corresponding with the light filling brightness is obtained；Wherein, the third corresponding relationship
For the corresponding relationship between light filling brightness and PWM value.
In a particular application, it can be analyzed in advance by a large amount of simulation test and data, obtain shooting distance, image ruler
Relationship between very little, light filling brightness and PWM value, the first corresponding relationship, the second corresponding relationship and third corresponding relationship can be to close
It is the form presence of the mapping tables such as mapping table, look-up table, the corresponding relationship specifically can be mapping relations.
In one embodiment, include: before step S102
Establish the corresponding relationship between camera distance and light filling brightness and preservation；
Establish the corresponding relationship between picture size and light filling brightness and preservation；
Establish the corresponding relationship between light filling brightness and PWM value and preservation.
Step S103: according to the PWM value, adjusting the brightness of light compensating lamp, to carry out light filling to the object.
In a particular application, the principle of the brightness of light compensating lamp is adjusted according to PWM value are as follows: light compensating lamp is controlled according to PWM value and is driven
The size of the current signal of dynamic device output, thus by the size for the electric current for adjusting the output to light compensating lamp, to adjust light compensating lamp
Brightness.In practical applications, light compensating lamp driver is specifically as follows light modulator or arbitrarily has the function of to adjust light compensating lamp brightness
Electronic switch；Light compensating lamp is specifically as follows LED light or the adjustable lamps and lanterns of any other brightness.
In a particular application, can also according to the brightness of current environment, come determine needs light compensating lamp brightness, if worked as
The brightness of preceding environment is higher, then the brightness of the light compensating lamp needed can be reduced suitably, conversely, the brightness of the light compensating lamp needed then may be used
To be suitably turned up.It in practical applications, can be using the ambient brightness measured as the important references parameter for adjusting light compensating lamp brightness
One of, so that the brightness of current light compensating lamp light filling brightness corresponding equal to PWM value with the sum of ambient brightness.
One embodiment of the present of invention also provides a kind of automatic light-supplementing method comprising:
When camera shooting, picture size and the current ambient brightness of camera distance or object are obtained；Wherein, the camera shooting
Distance is the distance between the object and the video camera；
According to the camera distance or described image size, PWM value is obtained；
According to the PWM value and the ambient brightness, the brightness of light compensating lamp is adjusted, to carry out light filling to the object；
Wherein, the brightness of the light compensating lamp is equal to the difference of the PWM value corresponding light filling brightness and the ambient brightness.
The embodiment of the present application is by when shooting, obtaining PWM value according to camera distance or picture size, and according to PWM value
The brightness for adjusting light compensating lamp, can automatically adjust the brightness of light compensating lamp, to object according to practical camera distance or picture size
Automatic light-supplementing is carried out, image quality is improved.
Embodiment two
The embodiment of the present invention provides a kind of automatic light-supplementing system, and can be stored in can arbitrarily shoot image or view
Frequency and the picture pick-up device for having light compensating lamp, for example, security monitoring camera, radio and television video camera, commonness photograph video camera, photograph
In the terminal devices such as camera and mobile phone, tablet computer, personal digital assistant, pc client with camera and light compensating lamp
Software program system.
As shown in Fig. 2, automatic light-supplementing system 100 provided in this embodiment, comprising:
Distance, dimension acquisition module 101 when for imaging, obtain the picture size of camera distance or object；Wherein,
The camera distance is the distance between the object and the video camera；
PWM value obtains module 102, for obtaining PWM value according to the camera distance or described image size；
Light filling control module 103, for adjusting the brightness of light compensating lamp according to the PWM value, to be carried out to the object
Light filling.
In one embodiment, the distance acquisition module includes:
Zoom magnification acquiring unit when for imaging, obtains optical zoom multiple；
Distance, size acquiring unit, for obtaining the camera distance or described image according to the optical zoom multiple
Size；Wherein, the optical zoom multiple is with camera distance positive correlation and negatively correlated with described image size.
In one embodiment, the PWM value acquisition module includes:
First light filling luminance obtaining unit, when for getting the shooting distance, according to the first corresponding relationship, obtain with
The corresponding light filling brightness of the camera distance；Wherein, pair of first corresponding relationship between camera distance and light filling brightness
It should be related to；
Second light filling luminance obtaining unit, when for getting described image size, according to the second corresponding relationship, obtain with
The corresponding light filling brightness of described image size；Wherein, pair of second corresponding relationship between picture size and light filling brightness
It should be related to；
PWM value acquiring unit, for obtaining PWM value corresponding with the light filling brightness according to third corresponding relationship；Its
In, corresponding relationship of the third corresponding relationship between light filling brightness and PWM value.
In one embodiment, the automatic light-supplementing system further includes establishing memory module, is used for:
Establish the corresponding relationship between camera distance and light filling brightness and preservation；
Establish the corresponding relationship between picture size and light filling brightness and preservation；
Establish the corresponding relationship between light filling brightness and PWM value and preservation.
One embodiment of the present of invention also provides a kind of automatic light-supplementing system comprising:
Distance, size, luminance acquisition module, when for imaging, obtain camera distance or object picture size and
Current ambient brightness；Wherein, the camera distance is the distance between the object and the video camera；
PWM value obtains module, for obtaining PWM value according to the camera distance or described image size；
Light filling control module, for the brightness of light compensating lamp being adjusted, to institute according to the PWM value and the ambient brightness
It states object and carries out light filling；Wherein, the brightness of the light compensating lamp is equal to the corresponding light filling brightness of the PWM value and the environment is bright
The difference of degree.
The embodiment of the present application is by when shooting, obtaining PWM value according to camera distance or picture size, and according to PWM value
The brightness for adjusting light compensating lamp, can automatically adjust the brightness of light compensating lamp, to object according to practical camera distance or picture size
Automatic light-supplementing is carried out, image quality is improved.
Embodiment three
As shown in figure 3, the embodiment of the present invention also provides a kind of video camera 1 comprising photographing module 10, control module 20,
Light compensating lamp drive module 30 and light compensating lamp 40.
In a particular application, photographing module specifically can be including camera, imaging sensor, analog-digital converter or image
Processor etc. is used to shoot and handle the device for realizing basic camera function including the device of image data.
In a particular application, control module can specifically be realized by single-chip microcontroller, can also by universal integrated circuit,
Such as CPU (Central Processing Unit, central processing unit), or pass through ASIC (Application Specific
Integrated Circuit, specific integrated circuit) etc. arbitrary there is the device of control and data processing function to realize.?
In a kind of application, control module is also possible to a part of the data processor that video camera itself carries or image processor,
It is also possible to the data processing device except the data processor or image processor independently of video camera itself.
In a particular application, light filling drive module specifically can be any type of light modulator (for example, controllable silicon light modulation
Device), electronic switch (for example, transistor or triode), relay etc. can be controlled by pwm signal and the device with dimming function
Part.
In a particular application, light compensating lamp can select arbitrary tunable optical lamps and lanterns according to actual needs, for example, LED light, cold
Cathode tube, halogen lamp etc..
As shown in figure 3, in the present embodiment, photographing module 10 and light compensating lamp drive module 30 are electrically connected with control module 20
It connects, light compensating lamp drive module 30 is electrically connected with light compensating lamp 40.
It should be understood that electrical connection signified in the present embodiment specifically refers to the company realized by transmission telecommunications number
It connects, it is any type of which can be current signal, electromagnetic wave signal, electric carrier signal, pulse signal, radio signal
Electric signal.
The working principle of each device in video camera provided by the present embodiment are as follows:
The photographing module is for imaging；
The control module is used to obtain the picture size of camera distance or object in photographing module camera shooting；
Wherein, the camera distance is the distance between the object and the video camera；
The control module is also used to obtain PWM value according to the camera distance or described image size；
The light compensating lamp drive module is used to adjust the brightness of the light compensating lamp according to the PWM value, to described shot
Object carries out light filling.
In one embodiment, the control module is specifically used for:
In photographing module camera shooting, the optical zoom multiple of the photographing module is obtained；
According to the optical zoom multiple, the camera distance or described image size are obtained；Wherein, the optical zoom
Multiple is with camera distance positive correlation and negatively correlated with described image size.
In one embodiment, the control module is also used to:
When getting the shooting distance, according to the first corresponding relationship, it is bright to obtain light filling corresponding with the camera distance
Degree；Wherein, corresponding relationship of first corresponding relationship between camera distance and light filling brightness；
When getting described image size, according to the second corresponding relationship, it is bright to obtain light filling corresponding with described image size
Degree；Wherein, corresponding relationship of second corresponding relationship between picture size and light filling brightness；
According to third corresponding relationship, PWM value corresponding with the light filling brightness is obtained；Wherein, the third corresponding relationship
For the corresponding relationship between light filling brightness and PWM value.
In one embodiment, the control module is also used to:
Establish the corresponding relationship between camera distance and light filling brightness and preservation；
Establish the corresponding relationship between picture size and light filling brightness and preservation；
Establish the corresponding relationship between light filling brightness and PWM value and preservation.
One embodiment of the present of invention also provides a kind of video camera comprising photographing module, control module, light compensating lamp drive
Dynamic model block, light compensating lamp and brightness detection module；
The photographing module, the light compensating lamp drive module and the brightness detection module are electrically connected with the control module
It connects, the light compensating lamp drive module is electrically connected with the light compensating lamp；
The photographing module is for imaging；
The control module is used to obtain the picture size of camera distance or object in photographing module camera shooting；
Wherein, the camera distance is the distance between the object and the video camera；
The brightness detection module is for when shooting, obtaining current ambient brightness；
The control module is also used to obtain PWM value, and according to described according to the camera distance or described image size
PWM value and the ambient brightness calculate target PWM value；Wherein, the brightness of the light compensating lamp is equal to the corresponding benefit of the PWM value
The difference of brightness and the ambient brightness, target PWM value are equal to the difference of the PWM value with the corresponding PWM value of majority ambient brightness；
The light compensating lamp drive module is used to adjust the brightness of light compensating lamp according to the target PWM value, to described shot
Object carries out light filling.
In one embodiment, the video camera in embodiment three can be used for executing method and step or packet in embodiment one
Include the system in embodiment two.
The embodiment of the present application is by when shooting, obtaining PWM value according to camera distance or picture size, and according to PWM value
The brightness for adjusting light compensating lamp, can automatically adjust the brightness of light compensating lamp, to object according to practical camera distance or picture size
Automatic light-supplementing is carried out, image quality is improved.
One embodiment of the present of invention also provides a kind of computer storage medium, the computer-readable recording medium storage
There is the step of computer program, the computer program realizes above-mentioned automatic light-supplementing method when being executed by processor.
The computer storage medium can be the internal storage unit of video camera or terminal device, such as terminal device
Hard disk or memory.The computer storage medium is also possible to the External memory equipment of video camera or terminal device, such as images
The plug-in type hard disk being equipped on machine or terminal device, intelligent memory card (Smart MediaCard, SMC), security value (s)
(Secure Digital, SD) card, flash card (Flash Card) etc..Further, the computer storage medium can be with
Both including internal storage unit or including External memory equipment.The computer storage medium is for storing the computer program
And other programs and data needed for the terminal device.The computer storage medium can be also used for temporarily storing
Data through exporting or will export.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each function
Can unit, module division progress for example, in practical application, can according to need and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device is divided into different functional unit or module, more than completing
The all or part of function of description.Each functional unit in embodiment, module can integrate in one processing unit, can also
To be that each unit physically exists alone, can also be integrated in one unit with two or more units, it is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.In addition, each function list
Member, the specific name of module are also only for convenience of distinguishing each other, the protection scope being not intended to limit this application.Above system
The specific work process of middle unit, module, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
Scope of the present application.
In embodiment provided herein, it should be understood that disclosed device/terminal device and method, it can be with
It realizes by another way.For example, device described above/terminal device embodiment is only schematical, for example, institute
The division of module or unit is stated, only a kind of logical function partition, there may be another division manner in actual implementation, such as
Multiple units or components can be combined or can be integrated into another system, or some features can be ignored or not executed.Separately
A bit, shown or discussed mutual coupling or direct-coupling or communication connection can be through some interfaces, device
Or the INDIRECT COUPLING or communication connection of unit, it can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, each functional unit in each embodiment of the application can integrate in one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated module/unit be realized in the form of SFU software functional unit and as independent product sale or
In use, can store in a computer readable storage medium.Based on this understanding, the application realizes above-mentioned implementation
All or part of the process in example method, can also instruct relevant hardware to complete, the meter by computer program
Calculation machine program can be stored in a computer readable storage medium, the computer program when being executed by processor, it can be achieved that on
The step of stating each embodiment of the method.Wherein, the computer program includes computer program code, the computer program
Code can be source code form, object identification code form, executable file or certain intermediate forms etc..Computer-readable Jie
Matter may include: can carry the computer program code any entity or device, recording medium, USB flash disk, mobile hard disk,
Magnetic disk, CD, computer storage, read-only memory (ROM, Read-Only Memory), random access memory (RAM,
Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..It should be noted that described
The content that computer-readable medium includes can carry out increasing appropriate according to the requirement made laws in jurisdiction with patent practice
Subtract, such as in certain jurisdictions, according to legislation and patent practice, computer-readable medium do not include be electric carrier signal and
Telecommunication signal.
Embodiment described above is only to illustrate the technical solution of the application, rather than its limitations；Although referring to aforementioned reality
Example is applied the application is described in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope of each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution should all
Comprising within the scope of protection of this application.
Claims (10)
1. a kind of automatic light-supplementing method is applied to video camera, which is characterized in that the described method includes:
When camera shooting, the picture size of camera distance or object is obtained；Wherein, the camera distance be the object with it is described
The distance between video camera；
According to the camera distance or described image size, PWM value is obtained；
According to the PWM value, the brightness of light compensating lamp is adjusted, to carry out light filling to the object.
2. automatic light-supplementing method as described in claim 1, which is characterized in that when the camera shooting, obtain camera distance or shot
The picture size of object, comprising:
When camera shooting, optical zoom multiple is obtained；
According to the optical zoom multiple, the camera distance or described image size are obtained；Wherein, the optical zoom multiple
It is positively correlated with the camera distance and negatively correlated with described image size.
3. automatic light-supplementing method as described in claim 1, which is characterized in that described according to the camera distance or described image
Size obtains PWM value, comprising:
When getting the shooting distance, according to the first corresponding relationship, light filling brightness corresponding with the camera distance is obtained；Its
In, corresponding relationship of first corresponding relationship between camera distance and light filling brightness；
When getting described image size, according to the second corresponding relationship, light filling brightness corresponding with described image size is obtained；Its
In, corresponding relationship of second corresponding relationship between picture size and light filling brightness；
According to third corresponding relationship, PWM value corresponding with the light filling brightness is obtained；Wherein, the third corresponding relationship is to mend
Corresponding relationship between brightness and PWM value.
4. a kind of automatic light-supplementing system is applied to video camera, which is characterized in that the system comprises:
Distance, dimension acquisition module when for imaging, obtain the picture size of camera distance or object；Wherein, the camera shooting
Distance is the distance between the object and the video camera；
PWM value obtains module, for obtaining PWM value according to the camera distance or described image size；
Light filling control module, for adjusting the brightness of light compensating lamp according to the PWM value, to carry out light filling to the object.
5. automatic light-supplementing system as claimed in claim 4, which is characterized in that the distance obtains module and includes:
Zoom magnification acquiring unit when for imaging, obtains optical zoom multiple；
Distance, size acquiring unit, for obtaining the camera distance or described image ruler according to the optical zoom multiple
It is very little；Wherein, the optical zoom multiple is with camera distance positive correlation and negatively correlated with described image size.
6. automatic light-supplementing system as claimed in claim 4, which is characterized in that the PWM value obtains module and includes:
First light filling luminance obtaining unit, when for getting the shooting distance, according to the first corresponding relationship, obtain with it is described
The corresponding light filling brightness of camera distance；Wherein, corresponding pass of first corresponding relationship between camera distance and light filling brightness
System；
Second light filling luminance obtaining unit, when for getting described image size, according to the second corresponding relationship, obtain with it is described
The corresponding light filling brightness of picture size；Wherein, corresponding pass of second corresponding relationship between picture size and light filling brightness
System；
PWM value acquiring unit, for obtaining PWM value corresponding with the light filling brightness according to third corresponding relationship；Wherein, institute
State corresponding relationship of the third corresponding relationship between light filling brightness and PWM value.
7. a kind of video camera, which is characterized in that the video camera include photographing module, control module, light compensating lamp drive module and
Light compensating lamp；
The photographing module and the light compensating lamp drive module are electrically connected with the control module, the light compensating lamp drive module
It is electrically connected with the light compensating lamp；
The photographing module is for imaging；
The control module is used to obtain the picture size of camera distance or object in photographing module camera shooting；Wherein,
The camera distance is the distance between the object and the video camera；
The control module is also used to obtain PWM value according to the camera distance or described image size；
The light compensating lamp drive module be used for according to the PWM value, adjust the brightness of the light compensating lamp, with to the object into
Row light filling.
8. video camera as claimed in claim 7, which is characterized in that the control module is specifically used for:
In photographing module camera shooting, the optical zoom multiple of the photographing module is obtained；
According to the optical zoom multiple, the camera distance or described image size are obtained；Wherein, the optical zoom multiple
It is positively correlated with the camera distance and negatively correlated with described image size.
9. video camera as claimed in claim 7, which is characterized in that the control module is also used to:
When getting the shooting distance, according to the first corresponding relationship, light filling brightness corresponding with the camera distance is obtained；Its
In, corresponding relationship of first corresponding relationship between camera distance and light filling brightness；
When getting described image size, according to the second corresponding relationship, light filling brightness corresponding with described image size is obtained；Its
In, corresponding relationship of second corresponding relationship between picture size and light filling brightness；
According to third corresponding relationship, PWM value corresponding with the light filling brightness is obtained；Wherein, the third corresponding relationship is to mend
Corresponding relationship between brightness and PWM value.
10. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists
In when the computer program is executed by processor the step of any one of such as claims 1 to 3 of realization the method.
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