像素位置偏差对质心定位精度的影响

	像素位置偏差对质心定位精度的影响
	曹阳; 李保权; 李海涛; 桑鹏
刊名	红外与激光工程
	2016
卷号	45 期号:12 页码:1217007
关键词	质心定位精度微型星敏感器像素位置偏差外差式激光干涉装置
ISSN号	1007-2276
其他题名	Pixel displacement effects on centroid position accuracy
中文摘要	为提高微型星敏感器的质心定位精度,提出了一种利用外差式激光干涉装置标定图像传感器像素位置偏差的方法,并就像素位置偏差对星点像质心定位精度的影响进行了仿真研究。在噪声忽略不计的情况下,当像素位置偏差服从(-0.02,0.02)上的均匀分布时,补偿系统误差能够使星点定位精度从0.008 pixel提高到0.002 pixel。而如果加入服从N(0,5.52)的高斯白噪声,当像素位置偏差服从(-0.02,0.02)上的均匀分布时,补偿像素位置偏差能使定位精度从0.020 pixel提高到0.018 pixel;当像素位置偏差服从(-0.04,0.04)上的均匀分布时,补偿像素位置偏差能使定位精度从0.026 pixel提高到0.018 pixel,提高了31%。这说明标定像素位置偏差对提升质心定位精度有显著作用,为发展高精度微型星敏感器提供了一种新的技术手段。
英文摘要	In order to improve the accuracy of centroiding for high precision miniature star tracker, a method to calibrate the imaging sensor pixel displacement using heterodyne laser interferometry was proposed. And the star position error due to imaging sensor pixel displacement was studied by simulation. The simulation results show that the accuracy of star position can be enhanced from 0.008 pixel to 0.002 pixel by compensating pixel displacement when pixel displacement obeys uniformly distributed over the interval(-0.02, 0.02) pixel. When the additive Gaussian noise in the star image has a normal distribution with mean 0 and standard deviation 5.5, if pixel displacement obeys uniformly distributed over the interval(-0.02, 0.02) pixel, the accuracy of star position can be enhanced from 0.020 pixel to 0.018 pixel after compensation; if pixel displacement obeys uniformly distributed over the interval(-0.04, 0.04) pixel, the accuracy of star position can be enhanced from 0.026 pixel to 0.018 pixel after compensation, which are 31% better than the accuracy without compensation. Simulation results show that calibrating pixel displacement which can significantly improves the star position accuracy can be used as a new method to develop high precision miniature star tracker.
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:5893413
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/5820]
专题	国家空间科学中心_空间技术部
推荐引用方式 GB/T 7714	曹阳,李保权,李海涛,等. 像素位置偏差对质心定位精度的影响[J]. 红外与激光工程,2016,45(12):1217007.
APA	曹阳,李保权,李海涛,&桑鹏.(2016).像素位置偏差对质心定位精度的影响.红外与激光工程,45(12),1217007.
MLA	曹阳,et al."像素位置偏差对质心定位精度的影响".红外与激光工程 45.12(2016):1217007.