数字图像复原技术中点扩展函数的改进  

Development of PSF in restoration of digital images

作　　者：杜华月[1] 何苏红[1] 陈磊[1] 戴斌飞[1] 吴成国[1] 钱湧 

机构地区：[1]中国人民解放军理工大学,江苏南京210007 [2]江苏省医疗器械检验所,江苏南京210037

出　　处：《光学仪器》2009年第1期10-14,共5页Optical Instruments

摘　　要：研究了在提高显微图像复原效果的过程中对光学系统点扩展函数测量方法的改进。采用自制点光源的方法，先后利用长焦距镜头远距离成像以及显微镜头近距离拍摄，分别获得光学系统的点扩展函数灰度图，并用于球墨铸铁表面金相结构图的复原，结合最大似然反卷积算法，验证了后一种点扩展函数测量方法的优越性。To improve the effectivity of restoration, the method to measure the PSF of optical system is developed. By fabricating a pointolite, the point spread function of the optical system is successively measured by long-focus lens at a long distance and by microscopic lens at a short distance. The both gray maps of two methods are applied to recover the constitution diagram of spheroidal graphite iron by maximum likelihood estimation algorithms, and the latter means is found to be the better one.

关 键 词：显微测量 图像复原 数字成像 点扩展函数(PSF) 

分 类 号：O439[机械工程—光学工程]