基于时间相关单光子计数的彩色非视域成像  

Color Non-line-of-sight Imaging Based on Time-correlated Single Photon Counting

作　　者：李薇薇 张同意[1,2] 康岩 薛瑞凯 王晓芳 梁锦涛 李力飞 LI Weiwei;ZHANG Tongyi;KANG Yan;XUE Ruikai;WANG Xiaofang;LIANG Jintao;LI Lifei(State Key Laboratory of Transient Optics and Photonics,Xi'an Institute of Optics and Precision Mechanics of CAS,Xi'an 710119,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,西安710119 [2]中国科学院大学,北京100049

出　　处：《光子学报》2024年第11期180-190,共11页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.62171443,62001473);陕西省重点研发计划(Nos.2022GY-009,2023-YBGY-427);西安市青年人才托举计划(No.095920211305)。

摘　　要：提出一种基于时间相关单光子计数和多波长激光照明的非视域成像方法,利用多波长激光探测的互补性能够复原出细节更加完整的非视域图像,并且与现有单波长时间相关单光子计数非视域成像方法相比,可同时获取到三维、彩色非视域成像结果,进一步拓展了非视域成像的信息维度。Non-Line-Of-Sight(NLOS)imaging is a special optical imaging technique.It refers to the technique of reconstructing an image of an object in the event of an occlusion between the imaging system and an object that cannot be directly observed.It is to collect and analyze the photon signal returned from the target through the intermediate surface(such as wall,floor,etc.),to realize the image reconstruction of the target scene.NLOS imaging can be divided into active and passive depending on whether an active illumination source is used or not.Passive NLOS imaging systems rely primarily on the object itself emitting light or reflecting ambient light for imaging.A ctive NLOS imaging systems generally use a laser source for active illumination,it can obtain 3D image of the NLOS target through collecting time-resolution photon data.With the development of semiconductor single-photon detectors,Single-Photon Avalanche Photodiode(SPAD)detectors have gradually been widely used in active NLOS imaging technology due to their advantages of single photon detection sensitivity and picosecond temporal resolution,small size and low power consumption.However,in previous studies,researchers always used single-wavelength laser source to illuminate,and the reconstructed images of the targets only provide grayscale information of the target.In this paper,we demonstrate a color NLOS imaging method based on Time-Correlated Single-Photon Counting(TCSPC)and multi-wavelength laser illumination.First,we built a NLOS imaging system using confocal optical path mode,adopt a SPAD detector and a picosecond multi-wavelength pulsed laser.Then,the phasor field virtual wave algorithm is used to reconstruct the data collected by the three wavelength channels of 620 nm±1.5 nm,532 nm±1.5 nm and 485 nm±1.5 nm,respectively.Finally,the three images obtained through different wavelength channels are synthesized to obtain a color NLOS image.In the experiments,targets containing different color information were selected for color NLOS imaging verification.T

关 键 词：非视域 单光子探测 多波长 彩色成像 飞行时间 

分 类 号：TN958.98[电子电信—信号与信息处理]