Intra prediction method and device for depth image

Abstract

The invention discloses an intra-frame prediction method and device of a depth image. The method includes the steps of determining a prediction block of a current image block corresponding to an intra-frame prediction mode according to the intra-frame prediction mode of the current image block, wherein the prediction block comprises a first area and a second area; taking a value of a sample point where a first position of the prediction block is located as a prediction datum of a pixel point of the first area of the prediction block, wherein the first position comprises the upper left corner of the prediction block; detecting the value of a sample point where the preset position of the prediction block is located and taking the value of the sample point where the preset position is located as a prediction datum of a pixel point of the second area of the prediction block if it is determined that the value of the sample point where the preset position is located is not equal to the value of the sample point where the first position is located. The values of the two different sample points can be found without traversal of values of sample points of the whole image block, and accordingly encoding and decoding efficiency is improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of image processing, and in particular, to a method and device for intra-frame prediction of a depth image. Background technique [0002] The 3D video image system includes two types of images, the view image and the depth image. The view image includes the information of the image itself, such as color information, and the depth image includes the depth information of the view image, such as contour information. In the transmission of 3D video images, in order to reduce the bandwidth occupied by video transmission, it is necessary to perform coding processing on video images, including coding processing of view images and depth images, so as to reduce the size of 3D video image data. [0003] In the prior art, the intra-frame prediction method is used for the encoding processing of the depth image in the 3D video image system. First, the encoding end divides the image to be encoded int...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a method and device for intra-frame prediction of depth images, which are used to solve the problem in the prior art that the encoding and decoding efficiency is not high due to the large number of sample points of image blocks that need to be detected

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