Method for coding and decoding three-dimensional video depth map based on segmentation of irregular homogenous blocks

Abstract

The invention relates to a method for coding and decoding a three-dimensional video depth map based on the segmentation of irregular homogenous blocks. The method comprises the following steps: (1) inputting a frame of depth map and a corresponding texture image; (2) coding a texture video by virtue of a standard coding method; (3) carrying out superpixel segmentation on the reconstructed texture video; (4) dividing the depth map into the irregular homogenous blocks; (5) calculating to enable the irregular homogenous blocks to correspond to a depth pixel value with minimum distortion in a synthetic region, wherein the depth pixel value represent the whole irregular homogenous block; (6) carrying out lossless coding on the depth map represented by the irregular homogenous blocks; (7) receiving and decoding a frame of three-dimensional video image code stream; (8) carrying out superpixel segmentation on the decoded video image; (9) reconstructing the decoded depth map; and (10) carrying out quality enhancement on the reconstructed depth map by virtue of a fake edge filtering method. By adequately considering the internal characteristic of smooth fragments of the depth map and the synthetic distortion of a virtual viewpoint, the coding efficiency of the depth map can be improved, the computation complexity of the coding of the depth map can be decreased, and the method can be compatible with any standard depth map coding method.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional video coding, and relates to a three-dimensional video depth map coding and decoding method based on irregular and homogeneous block segmentation. Background technique [0002] With the rapid development of multimedia technology, 3D video applications have been supported by more and more consumer electronic devices, such as 3D TVs, free-viewpoint TVs, and interactive video game devices. Compared with traditional video technology, 3D video can provide a perspective description of natural scenes through depth information, the so-called stereo perception. In addition, 3D video allows users to interactively select viewpoints. Currently, a 3D video is represented in a multi-view video plus depth map (Multi-view video plus depth, MVD) format, where the depth map is used to indicate a 3D geometric relationship of a scene. The advantage of the MVD format is that only a small number of texture ...

AI Technical Summary

Problems solved by technology

First, the compression of texture videos and depth maps affects the synthesis quality of virtual viewpoints in different ways

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