Extending epipolar geometry for real-time structured light illumination II: lossless accuracy

Kai Liu, Xuening Ran, Jun Gong, Jianwen Song, Daniel L. Lau, Ce Zhu, Bin Xu

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Structured light illumination is a process of 3D scanning using a digital projector to project a series of striped patterns that sweep a target surface, and based on the warping of the stripes viewed by a camera, the shape of the target can be reconstructed. In the case of scanning stripes separately in both horizontal and vertical directions, algorithms have been proposed that achieve real-time reconstruction through look-up tables; however, these look-up tables implement the inversion of one traditional lens projection matrix. In this Letter, we propose look-up tables constructed using (1) both views of a camera and a projector and (2) basic arithmetic operations rather than complex matrix operations to significantly reduce the total number of computations used to reconstruct a point cloud. Experiments show that, with the same accuracy, the proposed tables improve the computation speed by a factor of 6.66×, from 31.00 to 206.61 fps.

Original languageEnglish
Pages (from-to)837-840
Number of pages4
JournalOptics Letters
Issue number4
StatePublished - Feb 15 2021

Bibliographical note

Funding Information:
Funding. National Natural Science Foundation of China (61473198); Sichuan Science and Technology Program (2020YFG0029, 2019YFG0355).

Publisher Copyright:
© 2021 Optical Society of America

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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