基于空间复用检测的共焦非视域成像  

Confocal non-line-of-sight imaging based on spatial multiplexing detection

作　　者：郑海洋 罗一涵[1,2,3] 李泰霖 唐佳瑶 刘雅卿 夏诗烨 吴琼雁 谢宗良[1,2,3] Zheng Haiyang;Luo Yihan;Li Tailin;Tang Jiayao;Liu Yaqing;Xia Shiye;Wu Qiongyan;Xie Zongliang(Key Laboratory of Optical Engineering,Chinese Academy of Sciences,Chengdu,Sichuan 610209,China;Institutue of Optics and Electronics,Chinese Academy of Sciences,Chengdu,Sichuan 610209,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Electronic,Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院光束控制重点实验室,四川成都610209 [2]中国科学院光电技术研究所,四川成都610209 [3]中国科学院大学,北京100049 [4]中国科学院大学电子电气与通信工程学院,北京100049

出　　处：《光电工程》2023年第5期93-102,共10页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(62271468)。

摘　　要：非视域成像技术可以对视线外的物体成像,具有广泛的应用前景。为了解决基于数字微镜器件(DMD)在共焦非视域光路探测中,由于DMD的分光作用导致回波信号弱的问题,本文提出将空间复用检测(SMD)的采集方式引入到共焦光路中,将SMD的采集方式与光锥变换(LCT)的重建算法结合,从而提高回波信号的信噪比。基于共焦非视域成像光路,首先通过激光器发射激光脉冲,然后使用SMD的方式采集隐藏物体的回波,最后通过LCT算法完成了重建。实验结果表明,单像素相机在共焦非视域光路中采用SMD的采集方式,可以提高信噪比,提高重建质量。Non-line-of-sight imaging techniques can be used to capture images of objects that are hidden away in corners,and this technology has many useful applications.The captured signal is insufficient when the laser sends laser light to the intermediate surface,which is a problem when utilizing a digital micromirror device(DMD)in a confocal non-line-of-sight optical route because of the spectroscopic impact of the DMD.In order to increase the signal-to-noise ratio of the echo signal,the acquisition method of spatial multiplexing detection(SMD)is introduced into the confocal optical path in this study.SMD is integrated with the reconstruction algorithm of the light-cone transform(LCT).Based on the confocal non-line-of-sight imaging optical path,the laser initially emits laser pulses,followed by SMD collecting concealed object echoes,and the LCT algorithm concludes the reconstruction.The experimental results demonstrate that the single-pixel camera can complete the reconstruction using the LCT algorithm after employing the SMD acquisition method in the confocal non-line-of-sight optical route,which may improve the signal-to-noise ratio and the reconstruction quality.

关 键 词：共焦非视域成像 空间复用检测 光锥变换 

分 类 号：TN911.23[电子电信—通信与信息系统] O439[电子电信—信息与通信工程]