Research on constraint-based model reconstruction of structural parts

Model reconstruction is the core of reverse engineering. The current method for surface model reconstruction is not effective for most structural parts whose surfaces are often quadratic and have mutual constraints. This paper proposes a method for conducting constraint-based synchronous fitting on multiple surfaces. Firstly the measured data after segmentation are fitted respectively on the basis of algebraic distance, the types of the quadratic surfaces are recognized and their geometric parameters are acquired. Then the constraint relations between surfaces are extracted out. In the end synchronous fitting is carried out through constraint optimization method. By the method proposed in this paper the constraints among surfaces can be maintained and the original design intents incarnated.