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Sensors 2019, 19(2), 418; https://doi.org/10.3390/s19020418

Combining Non-Uniform Time Slice and Finite Difference to Improve 3D Ghost Imaging

1
School of optics and photonics, Beijing Institute of Technology, Key Laboratory of Biomimetic Robots and Systems, Ministry of Education, Beijing 100081, China
2
NUS Suzhou Research Institute (NUSRI), Suzhou Industrial Park, Suzhou 215123, China
*
Authors to whom correspondence should be addressed.
Received: 29 November 2018 / Revised: 15 January 2019 / Accepted: 18 January 2019 / Published: 21 January 2019
(This article belongs to the Special Issue Depth Sensors and 3D Vision)
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Abstract

Three-dimensional ghost imaging (3DGI) using a detector is widely used in many applications. The performance of 3DGI based on a uniform time slice is difficult to improve because obtaining an accurate time-slice position remains a challenge. This paper reports a novel structure based on non-uniform time slice combined with finite difference. In this approach, finite difference is beneficial to improving sensitivity of zero crossing to accurately obtain the position of the target in the field of view. Simultaneously, non-uniform time slice is used to quickly obtain 3DGI on an interesting target. Results show that better performances of 3DGI are obtained by our proposed method compared to the traditional method. Moreover, the relation between time slice and the signal-noise-ratio of 3DGI is discussed, and the optimal differential distance is obtained, thus motivating the development of a high-performance 3DGI. View Full-Text
Keywords: three-dimensional ghost imaging; differential optical path; non-uniform time slice; computational imaging three-dimensional ghost imaging; differential optical path; non-uniform time slice; computational imaging
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Zhang, F.; Cao, J.; Hao, Q.; Zhang, K.; Cheng, Y.; Wang, Y.; Feng, Y. Combining Non-Uniform Time Slice and Finite Difference to Improve 3D Ghost Imaging. Sensors 2019, 19, 418.

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