METHOD AND APPARATUS FOR PATCH-BASED TEXTURE IMAGE PREPROCESSING FOR EFFICIENT TEXTURE IMAGE COMPRESSION

摘要

A method and an apparatus for pre-processing patch-based texture image to compress the texture image effectively are provided to improve degradation of picture quality of a rendered image that an unintentional color appears on a 3D model due to a quantization error of texture coordinate information of 3D mesh. A pixel area separating unit(310) divides a patch-based texture image into a used pixel region including pixels which are used for texture mapping and a non-used pixel region including pixels which are not used for the texture mapping. A non-used pixel value setting unit(320) searches one or more valid pixels positioned to be adjacent pixels of each of non-used pixels in the non-used pixel region, and sets the value of the non-used pixel with a representative value obtained from the valid pixel value. The valid pixel includes a pixel which has been subjected for searching of an adjacent valid pixel, among the pixels within the used pixel region and the pixels within the non-used pixel region.