自适应双刃边法模糊红外图像复原  

Restoration of blurred infrared image by adaptive double edge method

作　　者：曹学影 王琳 谭覃燕 陈大秀 何洋洋 CAO Xueying;WANG Lin;TAN Qinyan;CHEN Daxiu;HE Yangyang(School of Physics and Optoelectronic Engineering,Xidian University,Xi’an 710071,China;Shanghai Academy of Spaceflight Technology,Shanghai 201109,China;Infrared Detection Technology Research&Development Center of CASC,Shanghai 201109,China)

机构地区：[1]西安电子科技大学物理与光电工程学院,陕西西安710071 [2]上海航天控制技术研究院,上海201109 [3]中国航天科技集团公司红外探测技术研发中心,上海201109

出　　处：《光学精密工程》2022年第5期630-640,共11页Optics and Precision Engineering

基　　金：中国航天科技集团公司第八研究院产学研合作基金资助项目(No.SAST2020-069);航空科学基金资助项目(No.2019ZD030004)。

摘　　要：红外图像由于对比度低、噪声大,导致图像边缘较为模糊,严重影响图像中有效信息的提取与识别。针对该问题,提出了一种基于相位一致性原理自适应提取双刃边进行模糊红外图像复原的方法。该方法首先利用频域的相位一致性点作为边缘特征点,提取图像边缘信息;在此基础上根据最优角度原则自适应地选择两条满足条件的刃边,拟合退化图像的点扩散函数;最后以点扩散函数为先验信息,利用快速全变分正则化模型实现模糊图像复原。实验证明,基于相位一致性自适应提取双刃边的方法高效且鲁棒性强,可有效提取各种形状图像边缘的刃边信息;在失焦、光学衍射、相对运动等不同图像退化条件下,相比于自适应单刃边法,本文算法所复原图像的平均梯度和信息熵分别提高了11.5%和1.4%,所生成的椭圆点扩散函数的复原效果明显优于传统单刃边法生成的圆形点扩散函数的复原效果。Owing to the low contrast and high noise present in infrared images,image edges are frequently blurred,severely affecting the extraction and recognition of information from the images.Based on the principle of phase congruence,an adaptive method of double-edge extraction for blurred infrared image restoration was proposed.First,the phase congruence points in the frequency domain were used as features to extract image edges.Then,two edges were adaptively selected according to the optimal angle principle to fit the Point Spread Function(PSF)of the degraded image.Finally,the fuzzy image was restored by using the Fast Total Variation(FTV)regularization model,with the PSF as prior information.Experimental results show that the method based on phase congruence is efficient and robust and can extract edges having varying shapes.Furthermore,under various conditions of image degradation,such as defocusing,optical diffraction,and relative motion,the average gradient and information entropy of the restoration improve by 11.5%and 1.4%,respectively,compared with the results of the adaptive single-edge algorithm.The restoration effect of the elliptical PSF generated by the double-edge method is considerably better than that of the circular PSF generated by the traditional single-edge method.

关 键 词：图像复原 相位一致性 自适应 双刃边 最优角度原则 点扩散函数 

分 类 号：TP391.1[自动化与计算机技术—计算机应用技术] TN21[自动化与计算机技术—计算机科学与技术]