3D Model Retrieval Based on Multi-Shell Extended Gaussian Image

摘要

In this paper, we consider a new shape representation for 3D object, called multi-resolution Multi-Shell Extended Gaussian Image (MSEGI) which eliminates the major drawback of EGI for not containing any direct distance information. MSEGI decomposes a 3D mesh model into multi-concentric shells by the normal distance of the outward surfaces to the origin, and captures the surface area distribution of a 3D model with surface orientation in each concentric shell. Then this distribution function is transformed to spherical harmonic coefficients which can provide multi-resolution shape descriptions by adopting different dimensions. Experimental results based on the public Princeton Shape Benchmark (PSB) dataset of 3D models show that the MSEGI significantly improves EGI, and outperforms CEGI and some popular shape descriptors.