Time-of-flight range imaging using group testing

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• 作者：Lei Zhang^a ; Feng Shi^b ; Yan Zou^c ; Tian-Yi Mao^a ; Wei-Ji He^a ; ^{hewj@mail.njust.edu.cn} ; Guo-Hua Gu^a ; Qian Chen^a
• 关键词：Photon counting ; Group testing ; Threshold ; Sparsity
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：130
• 期：Complete
• 页码：730-736
• 全文大小：868 K
• 卷排序：130

文摘

In a low-light-level imaging system where photon radiation is quite sparse, the traditional Nyquist sampling may always cause a lot of excessive information, resulting in substantial increased cost and reduced speed. This paper introduces a group testing method to the photon detection field and builds a ​​photon counting 3D imaging system. Our design relies on the interconnection of the binary matrices, contributing to the reduction of the photo multiplier tubes (PMT) and the excessive information, as well as the improvement of the system robustness. Besides, various binary interconnect matrices are designed to generate a threshold to improve the success rate of reconstruction. Analysis of the cross-talk of the fiber array and comparison of the group testing and compressed sensing are made further. Finally, our simulations show that images with large pixels can be successfully obtained by utilizing only a small number of PMT, due to the temporal and spatial sparsity of low level light.