An efficient coding for 3-D geometry data based on surface simplification and wavelet transform

This paper presents a new coding method for 3-D geometry data using surface simplification and the wavelet transform. A polygonal mesh model is constructed from the connectivity information and the geometric data. We have previously presented a coding method for the structured geometry data structured on a 2-D lattice plane. In this paper we present a coding method for the structured geometry data including the vertices which were contracted by the surface simplification as extended nodes on the 2-D plane. We apply the shape-adaptive wavelet transform to the structured geometry data containing the extended nodes to obtain the wavelet coefficients. Defining the parent-children dependency of the wavelet coefficients among the different frequency bands in consideration of the extended nodes, we obtain the coded data by using SFQ. Some experiments for a statue showed that the proposed method gives good coding performance compared to TAGC scheme.