基于环形合成孔径系统的图像复原技术  

Image restoration based on a toroidal synthetic aperture system

作　　者：孟咪莎 于洵[1] 刘婷婷 聂亮[3] 韩峰[1] 郭歌 MENG Misha;YU Xun;LIU Tingting;NIE Liang;HAN Feng;GUO Ge(School of Ordnance Science and Technology,Xi'an Technological University,Xi'an 710021,China;Southwest Electronic Telecommunication Technology Research Institute,Chengdu 610000,China;School of Optoelectronic Engineering,Xi'an Technological University,Xi'an 710021,China)

机构地区：[1]西安工业大学兵器科学与技术学院,陕西西安710021 [2]西南电子电信技术研究所,四川成都610000 [3]西安工业大学光电工程学院,陕西西安710021

出　　处：《粘接》2022年第3期166-171,共6页Adhesion

基　　金：陕西省教育厅重点科学计划研究项目(项目编号:20jy029)。

摘　　要：针对环形合成孔径成像系统在成像过程中产生噪声和图像模糊的问题,设计了一种基于Laplacian算子和参数维纳滤波的图像复原技术。针对环形合成孔径的成像退化特点,先对退化图像进行锐化处理,再使用参数维纳滤波对处理后的图像进行复原,同时对比传统的维纳滤波复原算法,以环形合成孔径系统为基本结构,分析和比较单个孔径与不同填充因子的六孔径环形系统的点扩散函数和调制传递函数特性,对系统成像性能和图像退化原因进行分析。仿真结果表明,运用Laplacian算子与参数维纳滤波复原算法对比维纳滤波,图像清晰度有明显提高,更好的实现环形合成孔径图像复原,其中填充因子最大为0.6的复原效果最佳,且峰值信噪比可以达到48.0286,实现合成孔径的高分辨率成像。Aiming at the problem of noise and image blur in the imaging process of the annular synthetic aperture imaging system,an image restoration technology based on Laplacian operator and parametric Wiener filtering is designed in this paper.Focusing on the imaging degradation characteristics of the annular synthetic aperture,this technology first sharpens the degraded image,then uses the parameter Wiener filter to restore the processed image.At the same time,compared with the traditional Wiener filter restoration algorithm,the annular synthetic aperture system is used as basic structure,analyze and compare the point spread function and modulation transfer function characteristics of a single aperture and a six-aperture ring system with different fill factors,and analyze the imaging performance of the system and the causes of image degradation.The simulation results show that using Laplacian operator and parametric Wiener filter restoration algorithm to compare Wiener filtering,the image definition is significantly improved,and the ring synthetic aperture image restoration is better realized.Among them,the restoration effect with the maximum filling factor of 0.6 is the best,and the peak signal-to-noise ratio can reach 48.0286,realizing high-resolution imaging with synthetic aperture.

关 键 词：环形合成孔径 点扩散函数 调制传递函数 退化 图像复原 LAPLACIAN算子 参数维纳滤波 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]