光学学报, 2017, 37 (1): 0101006, 网络出版: 2017-01-13
强天光背景下基于超完备字典的自适应光学天体目标的检测方法
Detection of Adaptive Optics Celestial Targets Under Strong Skylight Background Based on Over-Complete Dictionary
大气光学 自适应光学 天光背景 稀疏表示 超完备字典 atmospheric optics adaptive optics skylight background sparse representation over-complete dictionary
摘要
针对稀疏域对强天光背景下天体目标的探测问题, 在充分利用天光背景和光斑信号组成成分的形态差异性的基础上, 分别建立了天光背景和目标信号的超完备字典, 以区分图像中的天光背景区域与光斑信号区域。该方法能够在抑制强天光背景的同时积累更多的信号能量, 改善信噪比。仿真及实验结果表明, 此处理方法能够较好地提取出光斑信号, 且与减阈值算法相比, 其处理后质心偏差、均方根值及峰谷值都较小。
Abstract
Aiming at the detection of celestial targets under strong skylight background using sparse domain, the over-complete dictionary of skylight background and target signal is established respectively to distinguish the skylight background area and target area, which based on the difference between skylight background and target signal in their morphological components. The signal energy is accumulated while in suppressing the background, and the signal to noise ratio is also improved. Simulation and experimental results show that the target can be well subtracted, while the centroid deviation, the root mean square and peak-valley values of the centroid are small compared with the subtracting threshold method.
张艳艳, 孙原良, 龚信, 梅永. 强天光背景下基于超完备字典的自适应光学天体目标的检测方法[J]. 光学学报, 2017, 37(1): 0101006. Zhang Yanyan, Sun Yuanliang, Gong Xin, Mei Yong. Detection of Adaptive Optics Celestial Targets Under Strong Skylight Background Based on Over-Complete Dictionary[J]. Acta Optica Sinica, 2017, 37(1): 0101006.