摘要
实际光学系统的点扩散函数随视场的不同而变化,因此基于线性不变成像系统的图像恢复方法在处理由大视场系统得到的图像时,恢复效果不理想。若把成像系统作为线性空变系统来进行处理,根据等晕成像原理,如将降质图像分割为不同区域进行复原的话,则可以有效地提高图像的恢复效果。针对区域间边界不连续性的问题,提出了区域延拓的解决方法,通过数字仿真,验证了图像分割处理与区域延拓方法的可行性。
The PSF （Point-spread function） of the optical imaging system is variant with field angles, the restore result is unsatisfactory for the restoration methods based on the linear invariant imaging model when the system is one with large field angle. The result will be improved if the degraded image is divided into regions to be restored according to the isoplanatic theory, on the basis of that the system is a linear variant one. Regional continuation method is proposed to resolve the discontinuous problem between regions, and the simulated digital experiment of space variant degraded image restoration proofs the effectivity of this method.
出处
《光学技术》
CAS
CSCD
北大核心
2009年第2期190-193,共4页
Optical Technique
关键词
空间变化降质
图像恢复
区域延拓
图像分割
spatially variant PSF
image restoration
regional continuation
image sectioning
