简单光学系统的宽光谱点扩散函数估计  

Wide-spectrum PSF estimation for simple optical system

作　　者：郑云达 黄玮[1] 潘云 徐明飞[1] 贾树强[1] 张晓菲[1,2] 卢勇男 ZHENG Yun-da;HUANG Wei;PAN Yun;XU Ming-fei;JIA Shu-qiang;ZHANG Xiao-fei;LU Yong-nan(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《中国光学》2019年第6期1418-1430,共13页Chinese Optics

基　　金：应用光学国家重点实验室资助~~

摘　　要：为了准确获取简单光学系统的点扩散函数(PSF),提升图像复原质量,本文提出了一种基于PSF测量的宽光谱PSF估计方法。首先,测量了光学系统的窄带PSF,并结合图像匹配算法,标定了实际光学系统中的探测器位置和光轴中心偏移。然后,模拟实际光学系统各波长、各视场的PSF,再结合目标反射光谱和探测器光谱敏感信息计算实际目标的宽光谱PSF。实验结果表明:本文提出的PSF估计方法明显优于窄带PSF估计和盲估计方法,复原图片质量和稳定性均有明显提升,能够准确估计实际光学成像系统的PSF。In order to obtain point spread functions(PSFs)of a simple optical system accurately and improve the restored image quality,we present a wide-spectrum PSF estimation method based on PSF measurements.First,narrow-band PSFs are measured,and combining image matching algorithm,the sensor position and the deviation of the optical axis in the real optical system are calibrated.Then,the PSF of each wavelength and field of view is simulated and used for calculating the wide-spectrum PSFs of the real optical system according to the object reflectance spectrum and the spectral sensitivity information of the sensor.Experimental results indicate that the proposed PSF estimation method is better than the narrow-band PSF estimation and blind PSF estimation.The restored image is more stable and its quality is improved significantly.The proposed method can estimate the PSFs of the real optical imaging system accurately.

关 键 词：计算成像 点扩散函数 图像复原 宽光谱 

分 类 号：TP394.1[自动化与计算机技术—计算机应用技术] TH691.9[自动化与计算机技术—计算机科学与技术]