Effects of signal induced background (SIB) of image intensifier on centroid measurement of low-level-light target and the method of SIB noise suppression 

The effects of signalinduced background (SIB) of image intensifier on low-level-light target detection are analyzed. The results show that SIB is a signal dependent noise, and presents shot noise characteristics. It can't beeliminated by background removal using environment shielding or the threshold means. The SIB is harmful to centroid detecting of low-level-light target. A new method of centroid calculation is given to reduce SIB influence effectively.