Edge-Resolved Transient Imaging: Performance Analyses, Optimizations, and Simulations

Edge-Resolved Transient Imaging: Performance Analyses, Optimizations, and Simulations
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边缘分辨瞬态成像:性能分析、优化和模拟

DOI:
10.1109/icip42928.2021.9506590
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发表时间:
2021
期刊:
IEEE International Conference on Image Processing (ICIP
影响因子:
--
通讯作者:
Goyal, Vivek K
Goyal, Vivek K
中科院分区:
--
文献类型:
--
作者:
Saunders, Charles;Krska, William;Tachella, Julian;Seidel, Sheila W.;Rapp, Joshua;Murray-Bruce, John;Altmann, Yoann;McLaughlin, Stephen;Goyal, Vivek K

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边缘分辨瞬态成像(ERTI)是一种用于非视线成像的方法,其将用于测量距离的直接飞行时间与由垂直边缘遮挡器提供的方位角分辨率相结合。最近首次构思和演示,没有ERTI的性能分析或优化出现在已发表的论文中。本文阐述了ERTI检测隐藏场景物体的难度如何取决于各种参数,包括照明功率、采集时间、环境光、可见侧反射率、隐藏侧反射率、目标距离和目标方位角位置。基于这一分析,引入了采集过程的优化,从而改变照明停留时间,以抵消隐藏体积中更深角度处信噪比的下降。对同轴近似引起的误差进行了分析和仿真。
Edge-resolved transient imaging (ERTI) is a method for non-line-of-sight imaging that combines the use of direct time of flight for measuring distances with the azimuthal angular resolution afforded by a vertical edge occluder. Recently conceived and demonstrated for the first time, no performance analyses or optimizations of ERTI have appeared in published papers. This paper explains how the difficulty of detection of hidden scene objects with ERTI depends on a variety of parameters, including illumination power, acquisition time, ambient light, visible-side reflectivity, hidden-side reflectivity, target range, and target azimuthal angular position. Based on this analysis, optimization of the acquisition process is introduced whereby the illumination dwell times are varied to counteract decreasing signal-to-noise ratio at deeper angles into the hidden volume. Inaccuracy caused by a coaxial approximation is also analyzed and simulated.
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