CCD摄像机的输出调制度阈值分析  

Analysis of threshold modulation for CCD camera

作　　者：杨桦[1] 朱永红[1] 焦文春[1] 刘颖[1] 

机构地区：[1]北京空间机电研究所,北京100080

出　　处：《光学技术》2002年第6期523-524,527,共3页Optical Technique

基　　金：国防科技预研基金资助项目 (J2 0 .19.1)

摘　　要：应用数理统计学的有关内容对CCD输出信号中的随机噪声进行了相关分析。引入了“噪声等效调制度”这一概念 ,利用计算机模拟技术对摄像机成像时所产生的随机噪声进行了模拟与计算。通过计算机模拟 ,推导出了噪声等效调制度与CCD摄像机系统信噪比之间的关系。将信噪比对CCD摄像机成像质量的影响予以量化 。Random noise in CCD's output response is analyzed using mathematical statistical method. Moreover, the concept called 'noise equivalent modulation' is presented as the base of discussing the MTF threshold of CCD camera. The noise equivalent modulation caused by random noise is simulated using computer. In this way, the relation between noise equivalent modulation and SNR (Signal Noise Ratio) of CCD camera system is attained, and the effect of SNR on image quality of CCD camera can be described quantificationally. Furthermore, the threshold of CCD camera's output modulation is discussed.

关 键 词：CCD摄像机 噪声等效调制度 信噪比 输出调制度阈值 

分 类 号：TN948.41[电子电信—信号与信息处理] TN386.5[电子电信—信息与通信工程]