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| Research on Calibration of Three Dimensional Coordinate Reconstruction of Feature Points in Binocular Stereo Vision |
| WEI Zheng-liang, GU Yao-da, HUANG Zhi-bin, WU Jing |
| Guangzhou Institute of Measuring and Testing Technology, Guangzhou, Guangdong 510030, China |
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Abstract Binocular stereo vision is one of the 3D measurement techniques which is more adult in commerce. The accurate calibration of inner and out parameters for left and right camera is basic and important in realizing 3D reconstruction.Corresponding image process techniques to two calibration block pattern with chess corners or circle points are researched，so the feature points are located in sub-pixel accuracy and effectly sequenced.The optical and space parameters are calculated by calibration algorithm of homography constraint and multe-view plane.Accuracy of calibration result is evaluated by epipolar constraint residual error.The calibration of measurement results of flatness and angle between planes of feature points 3D reconstruction is completed by standard of bridge CMM.The calibration of space distance of feature points is completed by standard of optical CMM，and the uncertainty is analyzed.The indication error of space distance of circle calibration points 3D reconstruction is 0.029 mm, uncertainty U is 24 μm(k=2).
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2014, Vol. 35 
