红外与激光工程, 2019, 48 (3): 0306002, 网络出版: 2019-04-06   

脉冲激光辐照CMOS相机的图像间断现象及机理

Image interrupt effect and mechanism of pulse laser irradiated CMOS camera
作者单位
中国洛阳电子装备试验中心,河南 洛阳 471003
摘要
为了研究脉冲激光辐照CMOS相机时拍摄图像产生间断现象的原因, 利用1 064 nm脉冲激光对卷帘快门式CMOS相机进行了辐照实验。在获得的图像中观测到了间断现象, 表现为垂直方向上的亮区和暗区, 计算表明各帧图像中暗区的行数为固定值。根据CMOS图像传感器积分方式和扫描机制, 分析了图像间断现象的形成机理为卷帘快门式CMOS存储的不同时性。理论计算结果与实验结果一致, 并理论分析了完全无暗区图像存在的原因。提出了基于多帧间断图像采用拼接手段获得完整连续图像的方法, 得到的图像与直接拍摄图像基本一致。
Abstract
Irradiation experiments with a 1 064 nm pulse laser were conducted to investigate the image interrupt effect of pulse laser irradiating CMOS camera with rolling shutter. Image interrupt effects were observed in the experimental results with bright area and dark area in the vertical direction. Calculation results show that the number of dark area rows is a constant. According to the integrating mode and scanning mode of CMOS image sensor, the formation mechanism of image interrupt effect is the storage asynchronism of CMOS with rolling shutter. Theoretical calculation value fit well with the experimental result. The reason of the existing of image without dark area was also theoretically explained. Method based on stitching several interrupted images was proposed to obtain a full image without interruption, which was very similar to the experimental imaging results.

周旋风, 陈前荣, 王彦斌, 朱荣臻, 李华, 任广森. 脉冲激光辐照CMOS相机的图像间断现象及机理[J]. 红外与激光工程, 2019, 48(3): 0306002. Zhou Xuanfeng, Chen Qianrong, Wang Yanbin, Zhu Rongzhen, Li Hua, Ren Guangsen. Image interrupt effect and mechanism of pulse laser irradiated CMOS camera[J]. Infrared and Laser Engineering, 2019, 48(3): 0306002.

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