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Open AccessArticle

Single-Shot Dense Depth Sensing with Color Sequence Coded Fringe Pattern

School of Electronic Engineering, Xidian University, Xi’an 710071, China
Author to whom correspondence should be addressed.
Academic Editor: Andreas Kolb
Sensors 2017, 17(11), 2558;
Received: 19 August 2017 / Revised: 28 October 2017 / Accepted: 31 October 2017 / Published: 6 November 2017
(This article belongs to the Special Issue Imaging Depth Sensors—Sensors, Algorithms and Applications)
A single-shot structured light method is widely used to acquire dense and accurate depth maps for dynamic scenes. In this paper, we propose a color sequence coded fringe depth sensing method. To overcome the phase unwrapping problem encountered in phase-based methods, the color-coded sequence information is embedded into the phase information. We adopt the color-encoded De Bruijn sequence to denote the period of the phase information and assign the sequence into two channels of the pattern, while the third channel is used to code the phase information. Benefiting from this coding strategy, the phase information distributed in multiple channels can improve the quality of the phase intensity by channel overlay, which results in precise phase estimation. Meanwhile, the wrapped phase period assists the sequence decoding to obtain a precise period order. To evaluate the performance of the proposed method, an experimental platform is established. Quantitative and qualitative experiments demonstrate that the proposed method generates a higher precision depth, as compared to a Kinect and larger resolution ToF (Time of Flight) camera. View Full-Text
Keywords: depth sensing; structured light illumination; phase unwrapping depth sensing; structured light illumination; phase unwrapping
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Li, F.; Zhang, B.; Shi, G.; Niu, Y.; Li, R.; Yang, L.; Xie, X. Single-Shot Dense Depth Sensing with Color Sequence Coded Fringe Pattern. Sensors 2017, 17, 2558.

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