Depth map prediction method, pixel detection method and related devices

Abstract

The embodiment of the invention discloses a depth map prediction method, a pixel detection method and related devices. The depth map prediction method comprises the following steps: the maximum value and the minimum value in the characteristic values of a current block are acquired; if the current block is an image block in a depth map, the characteristic values are original pixel values; or if the current block is a residual block obtained by predicating the image block in the depth map, the characteristic values are residual values; and if the absolute value of the difference between the maximum value and the minimum value of the characteristic values of the current block is greater than or equal to a first threshold, segment-wise DC coding is carried out on the current block according to the characteristic values of part of pixels of the current block, wherein the part of pixels of the current block do not include a first class of pixels in the current block, and the first class of pixels in the current block are pixels of which the characteristic value is greater than or equal to a second threshold in the current block. The scheme of the embodiment of the invention can improve the coding efficiency and the quality of vision-synthesized reconstructed images.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a method for predicting a depth map, a method for detecting pixel points, and related devices. Background technique [0002] With the development of photoelectric acquisition technology and the growing demand for high-definition digital video, the amount of video data is increasing. The limited heterogeneous transmission bandwidth and diversified video applications continue to put forward higher requirements for video coding efficiency. The formulation of High Efficient Video Coding (English: high efficient video coding, abbreviation: HEVC) standard was started due to need. [0003] The basic principle of video coding and compression is to use the correlation between space domain, time domain and code words to remove redundancy as much as possible. The current popular practice is to use a block-based hybrid video coding framework to achieve video coding and comp...

AI Technical Summary

Problems solved by technology

Among them, since the pixel value of the pixel in the depth map represents the relative depth position of the object in the scene, the synthetic view image obtained by each pixel in the depth map is likely to cause the image quality of the synthetic view due to the existence of such pixels. Decrease, because these pixels usually cannot reflect the real object depth position

On the other hand, the existence of these pixels is also likely to affect the coding quality of the depth map

[0007] However, such pixels in the block are not specially considered in conventional techniques

For example, in segment-wise DC coding (English: segment-wise DC coding, abbreviation: SDC), in the estimation of the DC component of the segment in the block, such pixels usually cause the estimation of the DC component of the segment to be inaccurate, resulting in low prediction accuracy. , there is a large prediction residual, which affects the coding efficiency. In addition, such pixels are likely to affect the reconstructed image quality of the synthetic view

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