Self-Organization Fairness And Model Modification For 3D Points Cloud Data Of Free-surfaces

3D points cloud can present abundance details, also it is a sharp tool to represent object model. Because of the interferential data and leak of data, the data from reverse engineering is not applied in actual situation. So it is needed to model the 3D points cloud of fairness and modification. The thesis do the research of the technology about fairness and modification based on points cloud from image reverse engineering.The thesis do the deep research of the evaluation about the surface curvature, then get Mean curvature and Gaussian curvature, which represent the surface differential properties. By the help of the trait of curvature, the thesis complete the segmention of points cloud.Self-organization theory is developing widely recently, and using in many fields. Every member in self-organization is think to be active. In is creative to introduce the self-organization into the question about the fairness and modification based on the points cloud.After the self-organization theory is introduced into 3D points cloud, and compare the current fairness methods of points cloud, then the thesis choose the trimmed mean filter to accomplish the fairness, it is fast in the points cloud self-organization fairness, and fulfill with the need of self-organization fairness.During the process of points cloud modification, a parametric quadric surface approximation method is used to approximate the surface, then the thesis calculate the modified points cloud result. After all the points cloud alternated one time, use the modified result replace the original result to shape new surface, and then use degree of dispersed tolerance to control the alternate number, finally accomplish the points cloud self-organization modification.On the end of the thesis, author use the OpenGL and VC6.0 to frame the environment of 3D model presention, by the help of the method about fairness and modification, develope the software about self-organization fairness and modification system.