PREDICTIVE POSITION ENCODING

摘要

A method and apparatus for position coding of three dimensional mesh models are described including estimating a symbol probability of a non-empty-child-cell C1,k, where Q1,k denotes the kth cell at layer /, wherein the symbol probability is estimated based on an accuracy of a fitted plane P, sub-dividing the non-empty-child-cell to produce a sub-cell, if the non-empty-child-cell has more than one vertex, determining if there are more unprocessed non-empty-child-cells at layer /, if there are no more unprocessed non-empty-child-cells at layer /, determining if all non-empty-child-cells at layer / have only one vertex and a distance between the center of the sub-cell and a point inside the sub-cell is less than or equal to a first threshold and entropy coding symbols representing a position of the non-empty-child-cells, if all non-empty-child-cells at layer / have only one vertex and the distance between the center of the sub-cell and the point inside the sub-cell is less than or equal to the first threshold.