微扫描多帧平滑FPN提高CMOS图像传感器信噪比  

Improvement of the signal to noise ratio of CMOS image sensor by multi-frame-smooth FPN with microscanning

作　　者：首山雄[1] 陈进勇[2] 

机构地区：[1]浙江大学计算机软件研究所,浙江杭州310027 [2]浙江大学光学仪器厂,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2002年第6期621-623,共3页Journal of Zhejiang University：Engineering Science

摘　　要：在压电陶瓷驱动下,CMOS图像传感器在焦平面内每帧位移一个象素以获取一个帧与帧之间存在位移的周期性图像序列,通过电子反向位移对准,将一个周期内的图像帧叠加以消除固定图案噪声(fixedpatternnoise,FPN).选用SVGA的数字式CMOS图像传感器进行多帧微扫描成像试验.试验结果证明,多帧微扫描所得图像与无微扫描的单帧图像相比FPN已经完全消除.Actuated by PZT, the CMOS image sensor shifts one pixel every frame in focal plane and a periodic image sequence with displacement between frames is achieved. Aligned by electronically reversed shifting, the sequential frames within a period can be added and the FPN cancelled out. A SVGA digital CMOS image sensor is used for experiments of multi-frame microscanning imaging. Compared with single frame image, the experimental results show that the image derived from multi-frame microscanning imaging is free of FPN.

关 键 词：FPN 信噪比 微扫描 CMOS图像传感器 固定图案噪声 多帧平滑 成像质量 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]