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27 November 2007 Virtual orthogonal grid method for calibrating structured light binocular vision measurement system
Qiang Dai, Tao Geng, Hu Deng, Wei-he Ren, Jia-jie Liu
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Proceedings Volume 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 672349 (2007) https://doi.org/10.1117/12.783625
Event: 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 2007, Chengdu, China
Abstract
In order to calibrate structured light depth image object surface profile measurement binocular vision system, a calibration mathematical model and calculation method is given. Special gauge head is fixed on precision automatic platform, and then moved by standard space length in two-dimension measured section. Every orthogonal point's gauge head image is collected by subsystem. All orthogonal point coordinate values form a virtual grid field. The whole measurement section is divided into standard square region. From system coordinate transformation, the orthogonal point coordinate values in subsystem are one-to-one correspondence with real object coordinate values in the binocular vision measurement system. In every standard square region, the real object coordinate values are calculated and calibrated by segment linear interpolation. Detailed calibration algorithm principle and error analysis are given. The results show that a group of orthogonal grid point can calibrate the whole system measurement section. The systematic measurement errors are less than 0.15 mm within 100mm depth measurement range.
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Qiang Dai, Tao Geng, Hu Deng, Wei-he Ren, and Jia-jie Liu "Virtual orthogonal grid method for calibrating structured light binocular vision measurement system", Proc. SPIE 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 672349 (27 November 2007); https://doi.org/10.1117/12.783625
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KEYWORDS
Calibration
Structured light
Optical testing
Cameras
Imaging systems
Distance measurement
Head
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