WO2022233143A1 - 相机快门同步实现方法、装置和设备 - Google Patents
相机快门同步实现方法、装置和设备 Download PDFInfo
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- 230000003111 delayed effect Effects 0.000 claims description 5
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- 230000008569 process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/45—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
- H04N5/06—Generation of synchronising signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
Definitions
- This document relates to camera control technology, for example, to a method, apparatus and device for realizing camera shutter synchronization.
- multiple sensors are the same, or the shutter type is the same. If the shutter types of the multiple sensors are different, the shutter synchronization cannot be performed, and the screen shift will occur in high-speed dynamic scenes.
- the present application provides a method, device and device for realizing camera shutter synchronization, which can realize various sensor shutter synchronization.
- the application provides a method for realizing camera shutter synchronization.
- the camera may include multiple sensors; the shutter types of the multiple sensors are different; the method may include:
- the synchronization signal delay and/or the exposure delay of the multiple sensors are adjusted, so that the exposure areas corresponding to the multiple sensors are aligned.
- the present application also provides a device for realizing camera shutter synchronization
- the camera may include multiple sensors; the shutter types of the multiple sensors are different; the device may include: a counting unit and a synchronization signal unit;
- the counting unit can be configured to obtain a periodic synchronization reference signal and a synchronization signal corresponding to each sensor;
- the synchronization signal unit may be configured to adjust the synchronization signal delay and/or exposure delay of the multiple sensors based on the synchronization reference signal, so that the exposure areas corresponding to the multiple sensors are aligned.
- the present application also provides a device for realizing camera shutter synchronization, which may include a processor and a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed by the processor, the above-mentioned instructions are implemented. Any one of the camera shutter synchronization implementation methods.
- FIG. 1 is a flowchart of a method for implementing camera shutter synchronization according to an embodiment of the present application
- FIG. 2 is a schematic diagram of an exposure and synchronization method of the first type of senor according to an embodiment of the application;
- FIG. 3 is a schematic diagram of an exposure and synchronization method of the second type of senor according to an embodiment of the present application
- FIG. 4 is a schematic diagram of a shutter synchronization mode of different types of sensors according to an embodiment of the present application.
- FIG. 5 is a schematic diagram of shutter synchronization modes of different types of sensors when the exposure duration changes according to an embodiment of the present application
- FIG. 6 is a schematic diagram of shutter synchronization modes of different types of sensors when the frame period changes according to an embodiment of the present application
- FIG. 7 is a block diagram showing the composition of an apparatus for realizing camera shutter synchronization according to an embodiment of the present application.
- FIG. 8 is a schematic structural diagram of an apparatus for realizing camera shutter synchronization according to an embodiment of the present application.
- FIG. 9 is a block diagram of a device for realizing camera shutter synchronization according to an embodiment of the present application.
- An embodiment of the present application provides a method for realizing camera shutter synchronization.
- the camera may include multiple sensors; the multiple sensors have different shutter types; as shown in FIG. 1 , the method may include steps S101-S102.
- a shutter synchronization solution which can dynamically adjust the synchronization signal of the senior according to the change of the shutter, so as to ensure that the shutter times (ie, exposure times) of different seniors are in the same area in the shutter control schematic diagram. , realizes the shutter synchronization of multiple sensors of different shutter types.
- the exposure mode of the sensor may include two types.
- the working mode of the sensor of the first exposure type may be as shown in Figure 2.
- the synchronization signal is a periodic pulse, and the gray part is the exposure area. .
- the sensor starts exposure, and the time t1 (exposure duration) ends.
- the exposure duration t1 can be configured by itself.
- the time from the end of the exposure to the start of the next frame of exposure is t4, and the two periods of time add up to one frame.
- Period t3 the following relation can be satisfied:
- the working mode of the sensor of the second exposure type may be as shown in FIG. 3
- the synchronization signal is a periodic pulse
- the gray part is the exposure area.
- the sensor On the rising edge of the synchronization signal, the sensor does not start exposure, but delays for a period of time (ie, exposure delay) t0, and then starts exposure, and the exposure ends after time t1.
- the exposure time t1 can be configured by itself, and the idle time after exposure is t2, which can generally be a fixed value or 0.
- the delay of the exposure start relative to the synchronization signal is the exposure delay, which satisfies the following relationship:
- t3 is the duration of one frame of the synchronization signal (it can be referred to as the duration of one frame, that is, the frame period), from which relational expression 2 can be obtained:
- the exposure delay t0 varies with the exposure duration t1 and the one-frame duration t3. Every time the sensor exposure time changes, in addition to configuring the sensor parameters, you also need to configure the delay parameter t0 of the sensor.
- the plurality of sensors may include: a first sensor and a second sensor; the synchronization signal may include: a first synchronization signal corresponding to the first sensor and the second sensor the corresponding second synchronization signal.
- the frame period and exposure duration of any i-th frame first synchronization signal and i-th frame second synchronization signal are the same, and i is a positive integer; the rising edge of the first synchronization signal of each frame starts exposure, and the second The sync signal starts exposure after executing a preset exposure delay.
- the solution of the embodiment of the present application may include multiple sensors of different shutter types, and each sensor may correspond to a channel of synchronization signal for synchronizing multiple different sensors.
- a synchronization signal may also be included for reference, that is, a synchronization reference signal.
- two sensors may be used as an example to illustrate the implementation of the embodiment of the present application.
- the first sensor corresponds to the first synchronization signal
- the second sensor corresponds to the second synchronization signal.
- the synchronization reference signal is used as a reference.
- adjusting the synchronization signal delay and/or exposure delay of the multiple sensors which may include:
- the first synchronization signal of the jth frame Taking the exposure delay time of the second synchronization signal of the jth frame as the delay time of the synchronization signal of the first synchronization signal of the jth frame, and taking the rising edge of the synchronization reference signal of the jth frame as the starting point, the first synchronization signal of the jth frame Signal execution delay.
- the second synchronization signal and the synchronization reference signal remain unchanged, and the delay t5 of the first synchronization signal relative to the synchronization reference signal is adjusted (may be It is called the synchronization signal delay, that is, the delay of the first synchronization signal of the jth frame).
- t2 is generally a fixed value or 0.
- t0 can be calculated according to the relational formula 3.
- the method may further include:
- the exposure corresponding to the mth frame second synchronization signal is calculated according to the change in the frame period and/or the exposure duration of the mth frame first synchronization signal and the mth frame second synchronization signal Delay, m is a positive integer;
- the exposure periods in the m-th frame of the first synchronization signal and the m-th frame of the second synchronization signal are aligned according to the exposure delay of the m-th frame of the second synchronization signal.
- the calculation of the exposure delay corresponding to the mth frame of the second synchronization signal according to changes in the frame period and/or exposure duration may include:
- the method may further include: completing the calculation of the exposure delay corresponding to the second synchronization signal of the mth frame before the arrival of the rising edge of the synchronization reference signal of the mth frame.
- the calculation of the exposure delay is completed before the rising edge of the synchronization reference signal arrives, and the exposure area alignment is performed according to the exposure delay when the rising edge of the synchronization reference signal arrives.
- the solution in this embodiment may be: The technical basis for ensuring the shutter synchronization of the two sensors is provided.
- the exposure delay according to the second synchronization signal of the mth frame affects the exposure period in the first synchronization signal of the mth frame and the second synchronization signal of the mth frame Alignment, which can include:
- the duration of the exposure delay of the second synchronization signal of the mth frame is taken as the duration of the delay of the synchronization signal of the first synchronization signal of the mth frame, and the rising edge of the synchronization reference signal of the mth frame is taken as the starting point.
- a synchronization signal is delayed.
- the exposure duration of the second synchronization signal of the frame changes, as shown in FIG. 5 , the exposure duration becomes smaller at the m+1th frame.
- the changes of the second synchronization signal and the synchronization reference signal are consistent.
- relational formula 3 when the duration of one frame remains unchanged, the exposure duration becomes smaller, and the delay t0 can be increased.
- the frame period t3 remains unchanged, the second synchronization signal corresponds to the m+1th frame of the sensor, the exposure duration t1 becomes smaller, and the delay t0 becomes larger.
- the first synchronization signal also adjusts the synchronization signal delay t5 relative to the synchronization reference signal, and the duration of the synchronization signal delay is equal to the exposure delay t0 of the sensor corresponding to the second synchronization signal. It can be seen from FIG. 5 that after the adjustment of the first synchronization signal of the m+1th frame is completed, the exposure areas of the two senors are in an aligned state.
- the mth frame first synchronization signal and the mth frame first synchronization signal and the mth frame when the frame period synchronization of the mth frame synchronization reference signal, the mth frame first synchronization signal, and the mth frame second synchronization signal changes, the mth frame first synchronization signal and the mth frame first synchronization signal and the mth frame
- the exposure duration of the second synchronization signal of the frame remains unchanged, as shown in FIG. 6
- the frame rate (or frame period) at the m+1th frame becomes larger, and the one-frame time t3 becomes shorter.
- the changes of the second synchronization signal and the synchronization reference signal are consistent.
- the sensor corresponding to the second synchronization signal should keep the exposure duration t1 of the shutter not fluctuating with the frame rate.
- the delay time t0 can be adjusted.
- the frame rate becomes larger, t3 becomes shorter, the delay t0 becomes smaller, and the exposure duration t1 remains unchanged.
- the embodiment of the present application compared with the multi-sensor shutter synchronization in the related art, adopts the synchronization signal dynamic adjustment mode, and adjusts the sensor synchronization signal according to the changes of the shutter and the frame rate, so as to realize various types of sensor shutter synchronization.
- the camera does not have to use the same type of sensor, and different types of sensors can be added, thereby adding new functions of the camera, or using low-cost sensors to reduce costs.
- the embodiment of the present application also provides an apparatus A for realizing camera shutter synchronization.
- the camera may include multiple sensors; the multiple sensors have different shutter types.
- the apparatus may include: a counting unit A1 and a synchronization signal unit A2.
- the counting unit A1 may be configured to obtain a periodic synchronization reference signal and a synchronization signal corresponding to each sensor.
- the synchronization signal unit A2 may be configured to adjust at least one of the synchronization signal delay and the exposure delay of the multiple sensors based on the synchronization reference signal, so that the exposure areas corresponding to the multiple sensors are aligned.
- the counting unit A1 may be configured to generate a periodic synchronization signal, which may include: a synchronization reference signal, a first synchronization signal, and a second synchronization signal, and the synchronization reference signal may be used to synchronize the corresponding sensor
- a periodic synchronization signal which may include: a synchronization reference signal, a first synchronization signal, and a second synchronization signal
- the synchronization reference signal may be used to synchronize the corresponding sensor
- the delay adjustment of the signals (such as the first synchronization signal and the second synchronization signal) is used as a reference.
- the plurality of sensors may include: a first sensor and a second sensor;
- the synchronization signal may include: a first synchronization signal corresponding to the first sensor and the second sensor The corresponding second synchronization signal; wherein, the frame period and exposure duration of the first synchronization signal of the i-th frame and the second synchronization signal of the i-th frame are the same, and i is a positive integer; the rising edge of the first synchronization signal of each frame starts Exposure, the second synchronization signal of each frame starts exposure after executing the preset exposure delay;
- the synchronization signal unit adjusts the synchronization of the sensor based on the synchronization reference signal Signal delay and/or exposure delay, which can include:
- the first synchronization signal of the jth frame is delayed.
- the apparatus for realizing camera shutter synchronization may further include: a delay calculation unit A3.
- the delay calculation unit A3 can be set so that when the exposure period corresponding to the second synchronization signal of any mth frame is to be aligned with the exposure period corresponding to the first synchronization signal of the mth frame, and the first synchronization signal of the mth frame is to be aligned, In the case where the frame period and exposure duration of the synchronization signal and the m-th frame second synchronization signal change, or when the frame period or exposure time of the m-th first synchronization signal and the m-th frame second synchronization signal When the duration changes, the exposure delay corresponding to the second synchronization signal of the mth frame is calculated according to the change of the frame period and the exposure duration of the first synchronization signal of the mth frame and the second synchronization signal of the mth frame.
- the exposure delay corresponding to the second synchronization signal of the mth frame is calculated;
- the synchronization signal unit A2 may be further configured to perform an exposure period in the m-th frame of the first synchronization signal and the m-th frame of the second synchronization signal according to the exposure delay of the m-th frame of the second synchronization signal. Align.
- the delay calculation unit A3 may calculate the delay of the next frame synchronization signal according to the changes of the shutter and the frame rate.
- the synchronization signal unit A2 adjusts the delay of the rising edge relative to the reference signal according to the change of the delay, so as to ensure that the exposure areas of multiple senors are aligned.
- the delay calculation unit A3 completes the calculation before the rising edge of the synchronization reference signal arrives, and reduces the exposure delay and synchronization signal delay when the rising edge of the synchronization reference signal arrives. Send to synchronization signal unit A2 to take effect.
- each sensor may correspond to a synchronization signal and a sensor configuration unit A4.
- the sensor configuration unit A4 may be set to configure the parameters of the corresponding sensor.
- the camera shutter synchronization implementation device may further include: a parameter configuration unit A5; the parameter configuration unit A5 may receive an external configuration signal, and synchronize multiple units in the camera shutter synchronization implementation device A parameters to configure.
- Embodiments of the present application further provide a camera shutter synchronization implementation device B, as shown in FIG. 9 , which may include a processor B1 and a computer-readable storage medium B2, where instructions are stored in the computer-readable storage medium B2.
- a camera shutter synchronization implementation device B as shown in FIG. 9 , which may include a processor B1 and a computer-readable storage medium B2, where instructions are stored in the computer-readable storage medium B2.
- the computer-readable storage medium B2 may be a non-transitory storage medium.
- the implementation manner of the processor B1 may be a field programmable gate array (Field Programmable Gate Array, FPGA) chip, or a processor chip such as a main control unit (Microcontroller Unit, MCU) processor .
- FPGA Field Programmable Gate Array
- MCU main control unit
- any of the foregoing method embodiments are applicable to the device embodiments, and details are not repeated here.
- Embodiments of the present application further provide a storage medium containing computer-executable instructions, where the computer-executable instructions are used to implement a method for camera shutter synchronization when executed by a computer processor, wherein the camera includes a plurality of sensors; The shutter types of the multiple sensors are different; the method includes:
- the synchronization signal delay and/or the exposure delay of the multiple sensors are adjusted, so that the exposure areas corresponding to the multiple sensors are aligned.
- the computer storage medium of the embodiments of the present application may adopt any combination of one or more computer-readable storage mediums.
- the computer-readable storage medium may be a computer-readable signal storage medium or a computer-readable storage medium.
- the storage medium may be a non-transitory storage medium.
- the computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor device, apparatus or device, or a combination of any of the above.
- the computer-readable storage medium may be any tangible storage medium containing or storing a program, and the program may be used by or in combination with an instruction execution apparatus, apparatus, or device.
- a computer-readable signal storage medium may include a data signal propagated in baseband or as part of a carrier wave with computer-readable program code embodied thereon. Such propagated data signals may take a variety of forms, including electromagnetic signals, optical signals, or any suitable combination of the foregoing.
- a computer-readable signal storage medium can also be any computer-readable storage medium other than a computer-readable storage medium that can be sent, propagated, or transmitted for use by or in conjunction with an instruction execution apparatus, apparatus, or device program used.
- the program code embodied on the computer-readable storage medium may be transmitted by any suitable storage medium, including wireless, wire, optical fiber cable, radio frequency (RF), etc., or any suitable combination of the above.
- All or some of the steps in the above-disclosed methods, functional modules/units in the system, and apparatus may be implemented as software, firmware, hardware, and appropriate combinations thereof.
- the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of multiple Physical components execute cooperatively.
- Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit.
- Such software may be distributed on computer-readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media).
- computer storage media includes volatile and nonvolatile, removable and non-removable implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data medium.
- Computer storage media include Random Access Memory (RAM), Read-Only Memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), flash memory or other memories technology, Compact Disc Read Only Memory (CD-ROM), Digital Video Disk (DVD) or other optical disk storage, magnetic cartridge, tape, magnetic disk storage or other magnetic storage device, or can Any other medium used to store desired information and which can be accessed by a computer.
- Communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and can include any information delivery media.
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Claims (10)
- 一种相机快门同步实现方法,其中,所述相机包括多个传感器sensor;所述多个sensor的快门类型不同;所述方法包括:获取周期性的同步参考信号和每个sensor对应的同步信号;以所述同步参考信号为基准,调整所述多个sensor的以下至少之一:同步信号延时、或曝光延时,以使得所述多个sensor对应的曝光区域对齐。
- 根据权利要求1所述的方法,其中,所述多个sensor包括:第一sensor和第二sensor;所述同步信号包括:所述第一sensor对应的第一同步信号以及所述第二sensor对应的第二同步信号;其中,第i帧第一同步信号的帧周期和曝光时长与第i帧第二同步信号的帧周期和曝光时长相同,i为正整数;每一帧第一同步信号的上升沿开始曝光,每一帧第二同步信号在执行预设的曝光延时后开始曝光。
- 根据权利要求2所述的方法,其中,在第j帧第二同步信号对应的曝光时段与第j帧第一同步信号对应的曝光时段待对齐的情况下,所述以所述同步参考信号为基准,调整所述多个sensor的以下至少之一:同步信号延时、或曝光延时,包括:将所述第j帧第二同步信号的上升沿与第j帧同步参考信号的上升沿对齐,其中,j为正整数;将所述第j帧第二同步信号的曝光延时的时长作为所述第j帧第一同步信号的同步信号延时的时长,以所述第j帧同步参考信号的上升沿为起点,对所述第j帧第一同步信号执行延时。
- 根据权利要求2所述的方法,还包括:在第m帧第二同步信号对应的曝光时段与第m帧第一同步信号对应的曝光时段待对齐的情况下,并且在所述第m帧第一同步信号和所述第m帧第二同步信号的帧周期和曝光时长发生变化的情况下,或者在所述第m帧第一同步信号和所述第m帧第二同步信号的帧周期或曝光时长发生变化的情况下,根据所述第m帧第一同步信号和所述第m帧第二同步信号的帧周期和曝光时长的变化计算出所述第m帧第二同步信号对应的曝光延时,或者,根据所述第m帧第一同步信号和所述第m帧第二同步信号的帧周期或曝光时长的变化计算出所述第m帧第二同步信号对应的曝光延时,其中,m为正整数;所述以所述同步参考信号为基准,调整所述多个sensor的以下至少之一:同步信号延时、或曝光延时,包括:根据所述第m帧第二同步信号的曝光延时对所述第m帧第一同步信号和所述第m帧第二同步信号中的曝光时段进行对 齐。
- 根据权利要求4所述的方法,还包括:在第m帧同步参考信号的上升沿到来前完成所述第m帧第二同步信号对应的曝光延时的计算。
- 根据权利要求4或5所述的方法,其中,所述根据所述第m帧第二同步信号的曝光延时对所述第m帧第一同步信号和所述第m帧第二同步信号中的曝光时段进行对齐,包括:将所述第m帧第二同步信号的上升沿与第m帧同步参考信号的上升沿对齐;根据所述第m帧第二同步信号的曝光延时调整所述第m帧第一同步信号对应的曝光时段的上升沿相对于所述第m帧同步参考信号的上升沿的延时;将所述第m帧第二同步信号的曝光延时的时长作为所述第m帧第一同步信号的同步信号延时的时长,以所述第m帧同步参考信号的上升沿为起点,对所述第m帧第一同步信号进行延时。
- 一种相机快门同步实现装置,其中,所述相机包括多个传感器sensor;所述多个sensor的快门类型不同;所述装置包括:计数单元和同步信号单元;所述计数单元,设置为获取周期性的同步参考信号和每个sensor对应的同步信号;所述同步信号单元,设置为以所述同步参考信号为基准,调整所述多个sensor的以下至少之一:同步信号延时、或曝光延时,以使得所述多个sensor对应的曝光区域对齐。
- 根据权利要求7所述的装置,其中,所述多个sensor包括:第一sensor和第二sensor;所述同步信号包括:所述第一sensor对应的第一同步信号以及所述第二sensor对应的第二同步信号;其中,第i帧第一同步信号的帧周期和曝光时长与第i帧第二同步信号的帧周期和曝光时长相同,i为正整数;每一帧第一同步信号的上升沿开始曝光,每一帧第二同步信号在执行预设的曝光延时后开始曝光;在第j帧第二同步信号对应的曝光时段与第j帧第一同步信号对应的曝光时段待对齐的情况下,所述同步信号单元以所述同步参考信号为基准,调整所述多个sensor的以下至少之一:同步信号延时、或曝光延时,包括:将所述第j帧第二同步信号的上升沿与第j帧同步参考信号的上升沿对齐,其中,j为正整数;将所述第j帧第二同步信号的曝光延时的时长作为所述第j帧第一同步信号 的同步信号延时的时长,以所述第j帧同步参考信号的上升沿为起点,对所述第j帧第一同步信号执行延时。
- 根据权利要求8所述的装置,还包括:延时计算单元;所述延时计算单元,设置为在第m帧第二同步信号对应的曝光时段与第m帧第一同步信号对应的曝光时段待对齐的情况下,并且在所述第m帧第一同步信号和所述第m帧第二同步信号的帧周期和曝光时长发生变化的情况下,或者在所述第m帧第一同步信号和所述第m帧第二同步信号的帧周期或曝光时长发生变化的情况下,根据所述第m帧第一同步信号和所述第m帧第二同步信号的帧周期和曝光时长的变化计算出所述第m帧第二同步信号对应的曝光延时,或者,根据所述第m帧第一同步信号和所述第m帧第二同步信号的帧周期或曝光时长的变化计算出所述第m帧第二同步信号对应的曝光延时,其中,m为正整数;所述同步信号单元,还设置为根据所述第m帧第二同步信号的曝光延时对所述第m帧第一同步信号和所述第m帧第二同步信号中的曝光时段进行对齐。
- 一种相机快门同步实现设备,包括处理器和计算机可读存储介质,所述计算机可读存储介质中存储有指令,其中,当所述指令被所述处理器执行时,实现如权利要求1-6中任意一项所述的相机快门同步实现方法。
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