| The research subject of this dissertation is one part of Tianjin Key Technologyproject for education, which is named "Contour laser scanning and 3D dataprocessing system for color object"(project number: 033105211). It mainly analyzesand researches the whole processing of color 3D laser scanning data on the algorithmand software development. The whole procedure includes two parts, thepre-processing of point clouds and surface reconstruction. It is the main purpose ofthis dissertation to establish the color 3D model and implement the data interface withother applications. The purpose has been achieved partly, and the software forprocessing is designed at the same time, which has the standard interface with thelaser scanning system. So the processing system and software can be applied in themanufacturing and virtual reality technique, such as the network museum. The main research work is followed:1. The main procedure and key algorithms of the pre-processing for color 3D point clouds has been analyzed, and the integrated method of system judgment and manual selection is used to delete the noise data effectively.2. The point clouds data reduction algorithm with the color-boundary preservation in RGB color space is proposed in this paper. The algorithm can avoid both the shape and color distortion.3. The smoothing algorithm based on the B-Spline surface fitting is implemented. It is proved by the theory and experiments that this smoothing algorithm has the favorablycontrollable ability.4. In the processing of color surface reconstruction, the mesh algorithm is implemented using the half-edge structure. And it can realize easily the post processing, such as mesh smoothing and mesh reduction.5. The paper solves the key problems on the display of color model in the OpenGL platform. The robust processing software, 3D Color Surf Ver1.0, is developed using C++ language. The framework is layered, that fulfills the function partition lightly. So the software can be revised and updated flexibly.
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