3 Method and Apparatus for compressing vertex position of 3D mesh model

摘要

The invention relates to a method and apparatus for three-dimensional vertex position (vertex position) data indicating the coordinates on the three-dimensional space of the information used to present a mesh model by using the compression of the second quantization step.; Conventional compression methods occurs when the residual error is very large and the quantization error greatly in this case, is the shape of the reconstructed three-dimensional model to be visually very distorted or deformed, and do lowered away from the entropy encoding operation efficiency compression there was. Compression top position of a three-dimensional mesh model method according to the invention made in view of solving the above problems is characterized in that the compression method applied to the vertex position encoder and the decoder of a 3D mesh model, constituting the 3D mesh model a first step of receiving input to the vertex position information for determining a first quantization step and the second quantization step used in the quantization process, and a single 2; A second step of predicting the current position from the previous vertex to the vertex location encoding; A third step of comparing the predicted peak position and the actual peak position to obtain the prediction error of the peak position; A fourth step of compression by quantizing the prediction error of the peak position in the first quantization step; And a fifth step of compression by quantizing the first quantization error that occurred after the first quantizer with a secondary quantization step.