压缩感知在条纹相机成像中的应用  

Application of Compressed Sensing in the Streak Camera Imaging

作　　者：刘爱林 张敬金[1] 郭宝平 杨勤劳[1] 袁清钰[1] 雷宝国 邱振富 LIU Ai-lin;ZHANG Jing-jin;GUO Bao-ping;YANG Qin-lao;YUAN Qing-yu;LEI Bao-guo;QIU Zhen-fu(College of Optoelectronic and Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry Education, Shenzhen University, Shenzhen , Guangdong 518060, China;College of Electronic and Information, Hunan Technology and Engineering University, Yongzhou , Hunan 425100, China)

机构地区：[1]深圳大学光电工程学院光电子器件与系统教育部重点实验室,广东深圳518006 [2]湖南科技学院电子信息工程学院,湖南永州425100

出　　处：《光子学报》2018年第5期101-106,共6页Acta Photonica Sinica

基　　金：国家重大科学仪器设备开发专项(No.2014YQ230659);湖南省自然科学基金(No.13JJ6079);湖南省永州市科技计划项目(No.2015a20);湖南科技学院重点学科建设项目(电路与系统)资助~~

摘　　要：条纹空间分辨率从中心到边缘逐渐降低,为了改善条纹管像面的边缘空间分辨率,构造了一个基于压缩感知的条纹相机成像重构模型.压缩感知目标函数采用正交匹配法实现,并对重构参数进行了优化.原成像结果与重构结果对比表明:压缩感知重构图的对比度比原图提高了5%,极限分辨率比原图提高了2lp/mm,并且离轴远区的改善效果好于中心区的改善效果.压缩感知重构方法可以改善像面边缘的成像对比度从而提高条纹相机成像的静态空间分辨率.It is found that the resolution of the striations is reduced from the center to the edge.In order to improve the edge spatial resolution of the streak,the compression sensing is applied to the X-ray streak camera imaging system.The compressed sensing reconstruction model is constructed for the streak camera,the compressed sensing objective function is implemented by orthogonal matching method,and the reconstruction parameters are optimized.After the original image is compared with the reconstructed image,the result shows that the contrast ratio of the compressed sensing reconstruction is 5% higher than the original;the limit resolution is 2 lp/mm higher than the original image,furthermore,the improvement effect far from the central area is better than that of the central area.The compressed sensing reconstruction can improve image contrast ratio on the edge of image,thus,the static spatial resolution of the image is improved.

关 键 词：光电子学与激光技术 条纹相机 压缩感知 超快诊断 空间分辨率 

分 类 号：TB972[一般工业技术—计量学] TN143[机械工程—测试计量技术及仪器]