基于双向反射分布函数的非视域成像系统模型的仿真研究  

Simulation Research of Non-line-of-sight Imaging System Based on Bidirectional Reflectance Distribution Function

作　　者：徐伟豪 苏秀琴[1] 汪书潮 朱文华 陈松懋 王定杰 邬京耀 XU Wei-hao;SU Xiu-qin;WANG Shu-chao;ZHU Wen-hua;CHEN Song-mao;WANG Ding-jie;WU Jing-yao(CAS Key Laboratory of Space Precision Measurement,Xi'an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,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中国科学院空间精密测量重点实验室,西安710119 [2]中国科学院大学,北京100049

出　　处：《光子学报》2020年第12期157-169,共13页Acta Photonica Sinica

基　　金：中科院战略高技术创新项目(No.GQRC-19-19)。

摘　　要：为了研究现有非视域算法在不同反射特性下的性能,对非视域成像过程进行研究,选取基于物理渲染的双向分布函数,建立拟合真实环境的仿真系统.对目前非视域成像领域的频率波数域算法与光锥变换算法,进行仿真重建实验.研究了以上两种算法在不同粗糙度、入射角度、噪声等条件下重建的性能.仿真结果表明:反射特性的变化对光锥变换算法影响较大;噪声对频率波数域算法影响较大.基于实验结果的分析,改进频率波数域算法,仅利用测量数据的相位信息进行非视域重建.改进算法较好地重建了不同反射特性的目标物体,为进一步探究算法提供帮助.The Non-Line-Of-Sight(NLOS)imaging process was studied to figure out the performance of existing NLOS algorithms under different reflection characteristics,with adopting physically based rendering bidirectional reflectance distribution function.Two state-of-the-art algorithms named f-k algorithm and Light-Cone Transform(LCT)algorithm are considered in the reconstruction using the proposed simulation system.The performance of the two algorithms are analyzed under various roughness,angles and niose.The simulation results show that:the change of reflection characteristics has a greater impact on the LCT algorithm;noise has a greater impact on the f-k algorithm.Based on the analysis of the experimental results,this article proposes an improvement to the f-k algorithm,merely using the phase information of the measured data for NLOS reconstruction.Improved algorithm is cpable to reconstruct target objects with different reflection characteristics,providing help for exploring further study.

关 键 词：双向反射函数 仿真分析 图像重建 脉冲激光应用 成像系统 

分 类 号：TN249[电子电信—物理电子学]