基于点扩散函数的散焦图像复原及其效果比较  

Restoration on Defocused Image Based on PSF and Comparison of Effect

作　　者：殷惠莉[1] 杜娟[2] 梁睿[2] 

机构地区：[1]华南农业大学电子工程学院,广东广州510642 [2]华南理工大学自动化科学与工程学院,广东广州510641

出　　处：《成组技术与生产现代化》2015年第3期5-11,共7页Group Technology & Production Modernization

摘　　要：针对已知的散焦图像数学模型,通过先估计点扩散函数(PSF),然后利用维纳滤波估计原始清晰图像的方法,探讨PSF、调制传递函数(MTF)的估计方法,具体包括边缘地物法、空间频率响应法、基于APEX方法的估计算法.结合复原图像的模糊度客观评价函数和主观视觉评价来判别各方法的优劣,结果表明:边缘地物法较优.For the known mathematical model of the defocus image, the method is used in the paper , which includes PSF and Weiner filter to calculate the image in focus. In this paper, it is important to estimate the PSF or the equivalent MTF, which includes the edge method, the spatial frequency method and the APEX method. Finally, the advantages and disadvantages of the above methods with the objective and subjective evaluation on blur level are compared. According to the results, the edge method is better.

关 键 词：散焦图像 点扩散函数 调制传递函数 图像复原 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]