Detecting holes in point set surfaces

Abstract

Models of non-trivial objects resulting from a 3d data acquisition process (e.g. Laser Range Scanning) often contain\nholes due to occlusion, reflectance or transparency. As point set surfaces are unstructured surface representations\nwith no adjacency or connectivity information, defining and detecting holes is a non-trivial task. In this paper we\ninvestigate properties of point sets to derive criteria for automatic hole detection. For each point, we combine several\ncriteria into an integrated boundary probability. A final boundary loop extraction step uses this probability and\nexploits additional coherence properties of the boundary to derive a robust and automatic hole detection algorithm.