基于Walsh-Hadamard变换的单像素遥感成像  

Single-pixel remote imaging based on Walsh-Hadamard transform

作　　者：李明飞[1,2] 莫小范[1,2] 赵连洁[1,2] 霍娟[1,2] 杨然[1,2] 李凯[1,2] 张安宁[1,2] 

机构地区：[1]中国航天科技集团公司,北京航天控制仪器研究所,北京100094 [2]中国航天科技集团公司,量子工程研究中心,北京100094

出　　处：《物理学报》2016年第6期110-116,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11204011,11304007,60907031,61501015)资助的课题~~

摘　　要：本文提出了基于Walsh-Hadamard变换的单像素成像方案,并从理论分析、模拟仿真和实验验证三方面分别验证了该方案的可行性.实验上实现了350—900 nm波段对距离500 m和5000 m自然目标的128×128像素成像,成像速度0.5帧/秒.研究并讨论了单像素相机方案与计算量子成像方案的差异与共性,在此基础上分析了基于Walsh-Hadamard变换的单像素成像方案的优势与局限性.研究表明本方案同时适用于单像素相机和计算量子成像.由于单像素成像适用于应用在如红外热成像、微波成像等波段,因此在阵列探测器灵敏度或工艺达不到要求时存在优势.本文所提出的方案使得单像素成像技术向实际应用迈进了一步.Single-pixel imaging has become a topic of intense interest amongst theoreticians and experimentalists in recent years, and is still attracting great attention due to its potential applications in biomedical imaging, remote sensing,defence monitoring, etc. Two main fields should be involved in single-pixel imaging scheme： single-pixel camera and computational quantum imaging, which are proposed in the year 2006 and 2008, respectively. Although these two singlepixel imaging schemes belong to different research fields, they are nearly identical in the realization setup and using the similar image recovering algorithm. The single-pixel camera scheme is mainly based on compressive sensing algorithms,which can recover the image with about 30 percent measurements of its total pixels（raster scan method）, but need the prior knowledge of the image. While the computational quantum imaging method usually recovers the image by using the second-order correlation function, which is computational fast but need more measurements to retrieve a high quality image. Thus, both the methods mentioned above are time consuming. In this paper, a single-pixel imaging scheme based on Walsh-Hadamard transform is proposed and is demonstrated both theoretically and experimentally.The retrieving times of different algorithms are discussed and compared with each other. An image of 1024 × 1024 pixels can be acquired around 1 second with our method while it will take 8 seconds by using TVAL3 algorithm on the general computer in our numerical simulation experiment. It is also experimentally demonstrated that the nature targets from500 meters to 5000 meters away are acquired, with pixels of 128 × 128 and in the waveband of 350–900 nm, and the speed of the imaging frame rate is achieved at 0.5 frame per second. The differences and commons between single-pixel imaging and computational quantum imaging are also discussed in this article. It is found that the Walsh-Hadamard transform we proposed is stable and can be sufficiently saving the im

关 键 词：Walsh-Hadamard变换 单像素相机 计算量子成像 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置]