Research of color-coded structured light based on convolutional code

Hao Meng; Qi Xue; Bang Liu

doi:10.1117/12.2649503

14 October 2022 Research of color-coded structured light based on convolutional code

Hao Meng, Qi Xue, Bang Liu

Proceedings Volume 12343, 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022); 123430L (2022) https://doi.org/10.1117/12.2649503
Event: 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022), 2022, Qingdao, China

Abstract

Color Structured light is one of the important methods to obtain 3D information. Although it has the advantage of high efficiency, its reliability is easily affected by the ambient light and the color shape of the object to be measured. In this paper, the reason of low coding reliability is studied. Aiming at increasing the coding reliability of structured light, convolutional code is introduced into structured light three-dimensional measurement system to improve the reliability of system measurement. A new kind of color-coded structured light pattern is generated by combining convolution code with Gray code, which has the ability of correcting error bit at any position and has a relative high efficiency. In addition, the maximum likelihood decoding method using Viterbi algorithm is introduced as decoding method for convolutional code. Finally, the effectiveness of the coding and decoding scheme is proved by simulation experiments.

Citation Download Citation

Hao Meng, Qi Xue, and Bang Liu "Research of color-coded structured light based on convolutional code", Proc. SPIE 12343, 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022), 123430L (14 October 2022); https://doi.org/10.1117/12.2649503

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KEYWORDS

Forward error correction

Structured light

Computer programming

Reliability

Cameras

Convolution

Optical spheres

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