DocumentCode :
1893893
Title :
Space Camera Imaging Gain In-Orbit Adjusting Strategy
Author :
He, Xiaojun ; Jin, Guang ; Wang, Jinling
Author_Institution :
Changchun Inst. of Opt., fine Mech. & Phys., Chinese Acad. of Sci., Changchun, China
Volume :
1
fYear :
2009
fDate :
10-11 Oct. 2009
Firstpage :
698
Lastpage :
701
Abstract :
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 it´s 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.
Keywords :
CCD image sensors; aerospace instrumentation; quantisation (signal); remote sensing; CCD signal; SNR image; charge couple device; mean digital number; multistep gain adjusting strategy; signal-noise rate; space camera; Cameras; Charge coupled devices; Charge-coupled image sensors; High-resolution imaging; Image resolution; Optical imaging; Satellites; Signal processing; Signal to noise ratio; Space technology; CCD Signal Processor; Gain Adjusting; SNR; Space camera;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Intelligent Computation Technology and Automation, 2009. ICICTA '09. Second International Conference on
Conference_Location :
Changsha, Hunan
Print_ISBN :
978-0-7695-3804-4
Type :
conf
DOI :
10.1109/ICICTA.2009.174
Filename :
5287557
Link To Document :
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