Space Camera Imaging Gain In-Orbit Adjusting Strategy
A Multi-Step Gain Adjusting Strategy(MSGAS) of space camera was proposed,which was used to get higher SNR(Signal-Noise Rate)image.When the space camera working in poor light condition,the CCD signal was so weak that its difficult to get a clear image, to reduce the quantization noise and improve the SNR,we must amplify the CCD signal first and then quantize.The MSGAS was achieved by adjusting the gain of the CCD(Charge Couple Device)signal processor step by step,the upper limit and lower limit were set,if the MDN(Mean Digital Number) of a fixed length image data was not between the lower and upper limit,the gain was adjusted step by step.In the experiment,the upper limit,lower limit and the step were set,and the result of the experiment showed that MSGAS was robust and SNR was improved from 28 to 39.
component Space camera Gain Adjusting SNR CCD Signal Processor
Xiaojun He Guang Jin Jinling Wang
Changchun Institute of Optics, fine Mechanics and Physics,Chinese Academy of Sciences Changchun, Jil Changchun Institute of Optics,fine Mechanics and Physics,Cinese Academy of Sciences Changchun,Jilin Changchun Institute of Optics,fine Mechanics and Physics,Chinese Academy of Sciences Changchun,Jilin
国际会议
长沙
英文
698-701
2009-10-10（万方平台首次上网日期，不代表论文的发表时间）