Skeleton Surface Generation from Volumetric Models of Thin Plate Structures for Industrial Applications

摘要

Computed Tomography (CT) is a powerful non-destructive measurement technology to generate cross-sectional X-ray images of objects, from which three-dimensional volumetric models can be constructed. In this study, we focus on industrial applications for X-ray CT in the analysis of thin plate structures, and propose in particular a method to generate sufficiently accurate skeleton meshes from a volumetric model of a thin plate structure. We use a geodesic-based skeletonization algorithm to extract skeleton cells, which can then be contoured to generate a skeleton surface. Since the thin plate structure has junctions, the skeleton surface is non-manifold around these areas. Because of this, the Marching Cubes algorithm is extended to enable handling of multiple labels (signs) to generate non-manifold meshes. The generated mesh is optimized to pass through the mid of the plate by interpolating mapping. Some experimental results for industrial samples are shown using our implemented prototype system, and it is proven that the accuracy of the generated mesh is sufficient for industrial applications.