基于FPGA的图像传感器驱动信号实时控制方法
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摘要
针对某些图像传感器底层驱动信号需随曝光时间变化而实时控制的需求,提出了一种基于FPGA的驱动信号实时控制方法。该方法根据曝光时间与驱动信号的相位关系,充分利用FPGA的高速并行性实现了驱动信号随曝光时间任意变化而实时变化,从而保证图像传感器仍能正常、不间断工作。通过逻辑综合和硬件测试试验表明,该方法利用FPGA实现了某些图像传感器随曝光时间任意变化而输出视频仍流畅、无中断;同时FPGA可扩展应用于后续图像的预处理,从而易于实现最小视频处理及显示系统,具有良好的市场应用价值。
A real-time control method of driving signal based on FPGA was proposed to meet the need of real-time control of driving signal of some image sensors with exposure time changes. According to the phase relationship between the exposure time and the driving signal, this method makes full use of the high-speed parallelism of FPGA to realize the real-time change of the driving signal with the arbitrary change of the exposure time, so as to ensure that the image sensor can still work normally and continuously. The results of logic synthesis and hardware test show that this method uses FPGA to realize that the output video of some image sensors is still smooth and uninterrupted when the exposure time changes arbitrarily. At the same time, FPGA can be extended and applied to the preprocessing of subsequent images, so as to easily realize the minimum video processing and display system, which has good market application and value.
A real-time control method of driving signal based on FPGA was proposed to meet the need of real-time control of driving signal of some image sensors with exposure time changes. According to the phase relationship between the exposure time and the driving signal, this method makes full use of the high-speed parallelism of FPGA to realize the real-time change of the driving signal with the arbitrary change of the exposure time, so as to ensure that the image sensor can still work normally and continuously. The results of logic synthesis and hardware test show that this method uses FPGA to realize that the output video of some image sensors is still smooth and uninterrupted when the exposure time changes arbitrarily. At the same time, FPGA can be extended and applied to the preprocessing of subsequent images, so as to easily realize the minimum video processing and display system, which has good market application and value.
引文
[1]何舒文,王延杰,孙宏海等.高动态科学级CMOS相机系统的设计[J].液晶与显示,2015,30(4):729-735.
[2]杨海涛,常义林,王静等.一种基于亮度直方图的自动曝光控制方法[J].光学学报,2007,27(5):841-847.
[3]安然,陈彦,解静.CMOS图像传感器自适应动态范围调整曝光控制[J].红外与激光工程,2013,42(1):88-92.
[4]陈淑丹,汶德胜,杨文才等.基于CPLD的高帧频CMOS相机驱动电路设计[J].测控与仪器仪表,2008,11:9-11.
[5]樊春玲,范立超,明星等.基于FPGA的高性能CMOS图像采集系统设计[J].青岛科技大学学报(自然科学版),2018,39(1):114-118.
[6]何舒文,王延杰,孙宏海等.高动态科学级CMOS相机系统的设计[J].液晶与显示,2015,30(4):729-735.
[7]沈鸽,王美娇,嵇晓强.基于CameraLin k的视频图像采集与传输系统[J].微计算机信息,2011,27(8):99-100.
[2]杨海涛,常义林,王静等.一种基于亮度直方图的自动曝光控制方法[J].光学学报,2007,27(5):841-847.
[3]安然,陈彦,解静.CMOS图像传感器自适应动态范围调整曝光控制[J].红外与激光工程,2013,42(1):88-92.
[4]陈淑丹,汶德胜,杨文才等.基于CPLD的高帧频CMOS相机驱动电路设计[J].测控与仪器仪表,2008,11:9-11.
[5]樊春玲,范立超,明星等.基于FPGA的高性能CMOS图像采集系统设计[J].青岛科技大学学报(自然科学版),2018,39(1):114-118.
[6]何舒文,王延杰,孙宏海等.高动态科学级CMOS相机系统的设计[J].液晶与显示,2015,30(4):729-735.
[7]沈鸽,王美娇,嵇晓强.基于CameraLin k的视频图像采集与传输系统[J].微计算机信息,2011,27(8):99-100.