数字CCD摄像机抗纵向晕光驱动时序研究

Research on anti-blooming driving timing for CCD video camera

分析了CCD摄像机纵向晕光的产生原因,提出了一种消除数字CCD摄像机高照度像素上半部分纵向晕光的垂直移位驱动时序设计方法。根据CCD电荷转移时序控制原理,在两帧间插入垂直移位驱动时序,可以清除前一帧产生的饱和电荷,由此可以消除高照度像素上半部分纵向光晕。在ICX205电路板上,测试了本文提出的抗光晕驱动时序,结果表明,所提出的方法可以成功清除高照度像素上半部分纵向光晕。研究结果已应用于智能交通监测。

The principle how CCD camera causes vertical blooming is investigated,and a technique based on vertical driving timing is presented.Based on the control principle of CCD vertical driving timing,a special driving timing with a vertical shift timing inserted between two frames,which can transfer the remaining charge,is used for clearing the vertical blooming of the high-intensity-pixel.The driving timing is tested on a CCD demo board of ICX205,and the testing results show that the vertical blooming is deleted.This method has been applied to intelligent traffic monitoring.