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Proceedings Paper

Stereo vision system based on the laser dot matrix projection
Author(s): Chenglin Liu; Shaopeng Ma; Qinwei Ma; Xiangfu Zeng
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Paper Abstract

Binocular stereo vision system has been widely used in 3D shape and deformation measurement. Many experimental systems and instruments have been developed based on this method. To realize the stereo vision measurement, the measured surface must carry some image "structures", such as points, fringes, or even random speckles, so that the parallax of the dual camera could be obtained by matching the "structures". However, for on-line inspection of black surface, the general projection methods are impossible to produce the appropriate "structures". In this paper a new binocular stereo vision system based on the laser dot matrix projection is presented. The laser projector is made up of two pieces of orthogonal fine grating and laser diode, when the laser beam was projected to the grating, a laser dot matrix will be formed and this high contrast dot matrix could be imaged on any surfaces, including the black surfaces. Furthermore, the image quality is greatly improved by mounting a red color filter (if a red laser) on the camera lens. Finally, a 3D shape measurement of a black cylinder is completed to verify the validity of the system.

Paper Details

Date Published: 17 November 2011
PDF: 6 pages
Proc. SPIE 8197, 2011 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 819704 (17 November 2011); doi: 10.1117/12.906542
Show Author Affiliations
Chenglin Liu, Beijing Institute of Technology (China)
Shaopeng Ma, Beijing Institute of Technology (China)
Qinwei Ma, Beijing Institute of Technology (China)
Xiangfu Zeng, Beijing Institute of Technology (China)


Published in SPIE Proceedings Vol. 8197:
2011 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments
Yongtian Wang; Yunlong Sheng; Han-Ping Shieh; Kimio Tatsuno, Editor(s)

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