SHAPE MEASURING METHOD

摘要

A shape measuring method comprises: a step for creating a surface (C) representing the surface shape of an object to be measured as an implicit function on the basis of measurement point group data; a step for dividing the entire measurement region in which the surface (C) is present into tetrahedral small regions (hereinafter referred to as cells) laid closely without overlapping by division processing using a three-dimensional Delaunay drawing; a step for classifying the vertexes (4) of the cells into inner points (5) present inside the surface (C) and outer points (6) present outside; a step for extracting boundary cells; a step for calculating intersection points (7) of the boundary cells and the surface (C); a step for finding triangular or quadrangular faces (8) by connecting the intersection points (7) of the boundary cells; and a step for bonding all the faces (8). Consequently, closed polyhedral data that is the manifold of the object to be measured and contains no self-intersections can be automatically created.