时间门控SPAD阵列非视域成像的中介面BRDF散射特性研究  

Study on BRDF Scattering Characteristics of Relay Wall in Non-Line-of-Sight Imaging Based on Time-gated SPAD Array

作　　者：陈海鹏 金伟其[1] 李力[1] 裘溯[1] 于相之 CHEN Haipeng;JIN Weiqi;LI Li;QIU Su;YU Xiangzhi(MoE Key Lab of Photoelectronic Imaging Technology and System,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学光电成像技术与系统教育部重点实验室,北京100081

出　　处：《红外技术》2024年第11期1225-1234,共10页Infrared Technology

摘　　要：非视域成像是当前针对实际应用而迅速发展的成像技术之一,基于SPAD阵列的非视域成像模式相较于其他模式具有凝视成像,设备轻量化等优点。针对基于门控SPAD阵列的非视域成像方法进行分析,重点关注基于门控SPAD阵列的非视域成像的中介面BRDF(bidirectional reflectance distributionfunction,BRDF)散射特性及其对成像的影响,并选用Cook-Torrance模型对作为中介面的典型建筑材料BRDF散射特性进行建模分析;选取黑色亮光瓷砖、白色亚光瓷砖和黑色防护挡板3种典型建筑材料测量了BRDF数据,通过RANSAC(random sample consensus)算法剔除测量异常值,再采用遗传算法获得模型的特征参数,验证了通过特征参数描述材料BRDF散射特性的有效性,可为进一步的基于门控的SPAD阵列非视域成像研究奠定重要基础。Non-line-of-sight imaging is a rapidly developing imaging technology aimed at practical applications.The imaging mode based on a SPAD array has advantages such as staring imaging and lightweight equipment compared with others.This study analyzes a non-line-of-sight imaging method based on a time-gated SPAD array,focusing on the scattering characteristics of the BRDF of the relays in the time-gated SPAD array mode of non-line-of-sight imaging and its impact on imaging.The Cook-Torrance model was selected to model and analyze the BRDF scattering characteristics of typical building materials that serve as relays.The BRDF data of three typical building materials,namely black glossy tiles,white matte tiles,and black protective shields,were measured.The RANSAC algorithm was used to eliminate measurement outliers,and a genetic algorithm was employed to obtain the characteristic parameters of the model.This study validates the effectiveness of describing the BRDF scattering characteristics of materials using characteristic parameters,which can lay an important foundation for further research on time-gated SPAD-array-based non-line-of-sight imaging.

关 键 词：时间门控 SPAD阵列 非视域成像 中介面BRDF Cook-Torrance模型 

分 类 号：TN249[电子电信—物理电子学]