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Proceedings Paper

Range walk error correction using prior modeling in photon counting 3D imaging lidar
Author(s): Weiji He; Yunfei Chen; Zhuang Miao; Qian Chen; Guohua Gu; Huidong Dai
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Paper Abstract

A real-time correction method for range walk error in photon counting 3D imaging Lidar is proposed in this paper. We establish the photon detection model and pulse output delay model for GmAPD, which indicates that range walk error in photon counting 3D imaging Lidar is mainly effected by the number of photons during laser echo pulse. A measurable variable – laser pulse response rate is defined as a substitute of the number of photons during laser echo pulse, and the expression of the range walk error with respect to the laser pulse response rate is obtained using priori calibration. By recording photon arrival time distribution, the measurement error of unknown targets is predicted using established range walk error function and the range walk error compensated image is got. Thus real-time correction of the measurement error in photon counting 3D imaging Lidar is implemented. The experimental results show that the range walks error caused by the difference in reflected energy of the target can be effectively avoided without increasing the complexity of photon counting 3D imaging Lidar system.

Paper Details

Date Published: 19 September 2013
PDF: 11 pages
Proc. SPIE 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications, 89051D (19 September 2013); doi: 10.1117/12.2034059
Show Author Affiliations
Weiji He, Nanjing Univ. of Science and Technology (China)
Science and Technology on Low-Light-Level Night Vision Lab. (China)
Yunfei Chen, Nanjing Univ. of Science and Technology (China)
Zhuang Miao, Science and Technology on Low-Light-Level Night Vision Lab. (China)
Qian Chen, Nanjing Univ. of Science and Technology (China)
Guohua Gu, Nanjing Univ. of Science and Technology (China)
Huidong Dai, Nanjing Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 8905:
International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications
Farzin Amzajerdian; Astrid Aksnes; Weibiao Chen; Chunqing Gao; Yongchao Zheng; Cheng Wang, Editor(s)

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