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Single photon counting 3D imaging implemented under signal-to-noise ratio less than one
Author(s): Yan Kang; Tongyi Zhang; Lifei Li; Biao Wang; Wei Zhao
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Paper Abstract

We report a five-step processing algorithm for photon counting depth imaging under strong background noise environment, and experimentally verified that this method can realize single photon counting 3D imaging under signalto-noise ratio (SNR) less than 1. In order to accurately locate the target position when the ambient flux is high, a computational pile-up correction is performed to recover the underlying signal photons, then performing an adaptively full-pixel target position locating. After the target position is determined, the signal and noise photons are separated pixel-wisely using a cluster method. Pixels which have no arrival photons are filled by using the information from neighborhood. At last, by using total variation spatial regularization, the depth images are reconstructed accurately. To validate the proposed method, a single photon counting 3D imaging system is established and experiments at different noise levels are carried out. Experimental results show that accurate depth imaging can be reconstructed with the SNR as low as 0.41. This approach is suitable for depth imaging under high background noise and also very suitable for the noncooperative target imaging with no prior knowledge of the target distance for its adaptive range gating.

Paper Details

Date Published: 20 December 2019
PDF: 7 pages
Proc. SPIE 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 112094Z (20 December 2019); doi: 10.1117/12.2549971
Show Author Affiliations
Yan Kang, Xi'an Institute of Optics and Precision Mechanics of CAS (China)
Univ. of Chinese Academy of Sciences (China)
Tongyi Zhang, Xi'an Institute of Optics and Precision Mechanics of CAS (China)
Univ. of Chinese Academy of Sciences (China)
Lifei Li, Xi'an Institute of Optics and Precision Mechanics of CAS (China)
Biao Wang, Science and Technology National Electromagnetic Scattering Lab. (China)
Xidian Univ. (China)
Wei Zhao, Xi'an Institute of Optics and Precision Mechanics of CAS (China)
Univ. of Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 11209:
Eleventh International Conference on Information Optics and Photonics (CIOP 2019)
Hannan Wang, Editor(s)

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