Rapid depth map sequence interframe mode selection fractal coding method

Abstract

The invention provides a rapid depth map sequence interframe mode selection fractal coding method. The method includes: firstly, utilizing a fractal video compression method to code a color video, then decoding the color video by a fractal video decompression method to obtain macro block coding modes of the color video, and designing a complexity calculation formula of the depth map sequence frame macro block coding modes by utilizing correlation of depth map sequence frame macro blocks and the corresponding color video macro block coding. A frame coding I of a depth map sequence adopts an H.264 intra-frame prediction coding method; a frame coding P of the depth map sequence adapt an Roberts operator to detect object boundaries, and if the object boundaries are contained in the current depth map sequence frame macro blocks, a traditional full-search coding method is used, all the modes are traversed, and the best coding modes are obtained according to a Lagrangian rate-distortion optimization model; otherwise, coding model complexity of the current depth map sequence frame macro blocks is calculated, the best coding modes are selected in different effective modes to aim at two situations when the complexity is larger than a threshold value T and smaller than or equal to the threshold value T, and then the depth map sequence frame macro blocks are decoded by a fractal method.

Description

Technical field: [0001] The invention belongs to the field of three-dimensional video compression coding, relates to the compression coding of depth map sequences, lays a foundation for the real-time application of three-dimensional stereo video coding, and further improves the performance of depth map-based stereo video compression coding. Background technique: [0002] The depth map represents the distance information from the scene to the camera imaging plane, and it quantizes the actual depth value to [0,255] to obtain a grayscale image representing the depth information (see Tanimoto M, Fujii T, Suzuki K, et al.Multi -view depth map of Rena and Akko&Kayo[C], ISO / IEC JTC1 / SC29 / WG11, MPEG-M14888, China: Shenzhen, 2007.). [0003] Depth map compression is the core technology in 3D video system. Currently, methods for compressing depth image sequences are mainly based on the H.264 / AVC standard. For example, Yang Xu et al. proposed a fast depth image intra-frame coding met...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of high complexity of the current 3D video coding based on the depth map, the method of the present invention realizes a method of using the correlation between the depth map sequence frame macroblock and the corresponding color video macroblock encoding mode to pre-calculate the depth map sequence frame macroblock Coding mode complexity, in order to achieve the purpose of fast inter-frame mode selection during fractal coding of depth image sequences

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