关键词: 反求工程, 截面复合曲线, 参数化

Abstract: A new scheme for parametric model reconstruction based on simultaneous fitting of multiple 2D section curves was described, where constraints existed between the parameters of the curves. The introduced constraints during reconstruction process brought on an optimal trade-off between minimization of the fitting error and the constraint tolerances. The whole model reconstruction process mainly included four steps that were 2D section data acquire from unorganized 3D points, section data segmentation, sectional combined curve reconstruction, and parametric model reconstruction. Key algorithms for each forenamed step were depicted in detail and an experiment on reconstruction of 3D parametric model was given to validate the approach.

Key words: reverse engineering, sectional combined curve, parameterization, constraints