Local Shape Similarity Retrieval of Mechanical Parts

Abstract

A scale-invariant shape feature is proposed. The shape feature is extracted on gray voxel models by a SIFT-like algorithm to describe the local shape information of 3D models. Shape feature vectors are constructed by a BoF method. A distance function that supports the part-in-whole matching is employed to compute the dissimilarity between 3D models. Experiments demonstrate that the proposed method achieves a satisfactory retrieval performance.