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10 February 2005 Research on the color 3D profilometry and parameter calibration technology
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A completed system for color 3D object measurement is presented, which is composed of a line-structured laser sensor and a two-axes translation stage. As well as the mathematics model of 3D measurement based on line-structured laser method is founded and two groups of unknown-parameters are derived, namely the camera parameters and the light-plane parameters. The color 3D data (xi,yi,zi)-(Ri,Gi,Bi) is obtained by merging the color data (Ri,Gi,Bi) and 3D (xi,yi,zi) data according to the corresponding pixel coordinates (ui,vi) of the stripe. A kind of circle pattern is applied in the calibration on both groups of parameters, however the way to acquire the control points by use of the pattern is different in each calibration process. In the calculation of light-plane calibration, an unrestricted object function is constructed to ensure the orthogonal character and accuracy of the parameters. In order to verify the measurement accuracy of the calibrated system, the measurement on a standard jig is performed with the accuracy better than 0.1mm. The result shows the parameters calibration is reasonably effective and reliable. The system is developed for the antique digitization, game development, etc., and it will have a promising future.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Li Tao, Changku Sun, Li He, and Shenghua Ye "Research on the color 3D profilometry and parameter calibration technology", Proc. SPIE 5638, Optical Design and Testing II, (10 February 2005);


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