Study On The Color 3D Laser Scanning Imaging System

With the improvement in the application of 3D measurement technique, various3D measurement techniques are developed in a short period of time. In this paper, acolor 3D scanning measurement system was developed, which composed of aline-structured sensor, a motorized translation stage and a motorized rotary stage.After the scanning measurement on 3D data of the object, the scanning procedure isrepeated to capture the color data. Then two groups of data are merged into the color3D data(xi, yi, zi) ? (Ri,Gi, Bi). This project is financially supported by the Tianjin key technology project named"Color 3D laser scanning contour measurement and processing system"(No.033105211), the destination of which is to develop a color 3D measurementsystem that can be applied to the antique digitization, game development etc. Themain research work in this paper is as follows:1. Analyzing various color 3D measurement methods. The mathematics model of the line-structured laser scanning measurement was founded;2. To get a number of control points with a circle pattern for the calibration of light-plane parameters. And an unrestricted object function was constructed to ensure the orthogonal character and high accuracy of the parameters;3. With a standard ball the rotation axis of the rotary stage is calibrated. The experiment result shows the high accuracy, and the parameters of the axis can meet the requirement of the rotary scanning measurement.4. A stripe image processing flow was designed; the pixel coordinates of the stripe can be extracted accurately from the noise background.5. A line-structured laser scanning measurement system and measurement software was developed. Measurements on some color models were performed, which achieve satisfactory results with the space measurement accuracy better than 0.5mm.