可调强光对可见光CCD摄像系统成像过程的干扰研究  

Study on interference to imaging process of visible CCD camera by adjustable light

作　　者：陶会锋[1,2] 杨华[1,2] 王一程[1,2] 凌永顺[1,2] 

机构地区：[1]脉冲功率激光技术国家重点实验室(电子工程学院),安徽合肥230037 [2]电子工程学院红外与低温等离子体安徽省重点实验室,安徽合肥230037

出　　处：《红外与激光工程》2014年第5期1605-1609,共5页Infrared and Laser Engineering

基　　金：安徽省自然科学基金(1308085JGD05);教育部新世纪优秀人才支持计划(NCET-09-0322)

摘　　要：为了对抗电视成像制导武器,采取用可调强光照射目标的方式对CCD摄像系统的成像过程实施干扰。首先在介绍CCD摄像系统获取图像流程的基础上理论计算了输出图像灰度值与光照条件、摄像机参数之间的关系;然后,讨论了不同光强比和照射面积比等光照条件对CCD摄像机增益控制的影响,得到了增益随光照条件变化的调节曲线;最后开展了全局光照和局部光照对成像质量的影响以及按一定出光时序控制光照条件对成像质量影响的实验,并利用结构相似度(SSIM)对干扰图像进行质量评价。结果表明:可调强光能够对CCD成像过程造成很大干扰,使获取的图像质量大大降低。The way that adjustable light interference the imaging process of the TV seeker is to confront TV guidance weapons. Based on introducing the process of camera obtaining images, the relationship between the image grayscale and illumination condition, camera parameters was theoretically analyzed firstly. Then the influence on gain control with different light intensity ratio and irradiating area ratio was discussed, and the adjustment curve of gain with the light conditions changing was got. Finally, the experiment about how global illumination and partial illumination influent on image quality and how the illumination in accordance with certain control time order influent the imaging process of CCD camera was carried on, and the quality of interference image by using the function of structural similarity（SSIM） was evaluated. The results show that this way of interference is very efficient. The adjustable light can interfere the imaging process of CCD camera, and can make image quality reduced greatly.

关 键 词：可调强光 CCD摄像机 自动增益 图像质量评价 

分 类 号：TN249[电子电信—物理电子学]