The Marking Method of 3D Tooth Model Based on Seed-Growing and Surface Clipping

It is a research focus of computer graphics aided orthodontics in terms of realizing the local texture mapping of 3D tooth model to mark the 3D tooth model easily and quickly. According to the problem of incomplete mapping area appearing in local texture mapping of surfaces constructed by triangular mesh, this paper selects and locks the 3D model local area fastly and accurately by means of seed-growing and surface clipping firstly, and then realizes the mapping relation by VTK mapping technology. Meanwhile, the algorithm in this paper proposed can control texture mapping position, the size of mapping area and texture mapping direction effectively based on actual demand. The algorithm ensures the integrity and continuity of the area to a certain extent, and it is also reasonable to distribute 2D coordinates to 3D points in target area. The experimental results show that this method can efficiently, evenly and completely mark the 3D tooth model, and have good real-time performance and vivid effect.