摘要
迭代位移叠加法(ISA)是一种天文高分辨空域统计重建方法,对双星等多点源天文目标的空域统计重建试验表明,多点源目标的重建效果优于经典的重谱法,计算速度也比重谱法快。该方法不能直接应用于太阳或卫星等天文和空间扩展目标的高分辨重建中,因此对迭代位移叠加法进行修正后进行了不同光子水平下的人造卫星的高分辨重建的数值仿真试验。对暗弱扩展目标的仿真重建试验表明,修正的迭代位移叠加法具有明显的抑制光子噪声的效果,具有比重谱法等频域重建方法更好的重建效果。
Iterative shift-and-add technique（ISA） refers one of the space domain statistical reconstruction methods. The experiments of the space domain statistical reconstruction, of which objective is the multipoint-source objective such as binary star, show that the effect of ISA is better than the speckle masking and also its speed is faster than the speckle masking. ISA cannot be directly used to the high-resolution reconstruction of astronomical and space extended objective such as the sun or satellites so that this article discusses the possibilities of applying ISA to extended objective reconstruction by modification and carries out numerical simulation experiments of high resolution reconstruction of satellites under different photon noises. The simulation experiments show the improved ISA can silence photon noise and for the faint expanding objective reconstruction it has better reconstruction effect than frequency reconstruction method such as speckle masking.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2009年第5期1205-1210,共6页
Acta Optica Sinica
基金
国家自然科学基金(10778636
10573035)资助项目
关键词
图像处理
迭代位移叠加法
扩展目标
数值仿真
image processing iterative shift-and-add technique extended object numerical simulation
