光学精密工程2011，Vol.19Issue(12)：3043-3048,6.DOI:10.3788/OPE.20111912.3043
基于能量累加的空间目标星像质心定位
Centroid location for space targets based on energy accumulation
摘要
Abstract
Sub-pixel positioning technology for CCD images is proposed to improve the astronomical location precision of space targets. The main factors affecting the positioning accuracy of targe centroids, such as image noise, discrete sampling error and window size selection are analyzed. Combining with the CCD imaging characteristics for dispersion spots, a location method for target centroids based on energy accumulation is proposed. This method uses the interpolation technique to reduce the illumination inconsistency between actual sensitive area and discrete sample points, and uses the energy accumulation of dispersion spot to select the efficient target window for optimizing target gray and eliminating random noises. Finally,a squared weighted centroid localization method is taken to calculate the centroid position. Experimental results show that the method has strong anti-interference ability and stability. It can offer a positioning accuracy of 0. 01 pixel and is suitable for a low SNR condition.关键词
天体测量/空间目标/质心定位/能量累加Key words
astronomical measurement/ space target/ centroid location/ energy accumulation分类
信息技术与安全科学引用本文复制引用
孙瑾秋,周军,张臻,张永鹏..基于能量累加的空间目标星像质心定位[J].光学精密工程,2011,19(12):3043-3048,6.基金项目
国家自然科学基金资助项目(No.60872145) （No.60872145）
高等学校科技创新工程重大项目培育基金资助项目(No.708085) （No.708085）
