Image processing method, device and system

Abstract

The embodiment of the invention provides an image processing method, a device and a system, and relates to the field of multimedia. Transformation errors caused by DLT and generated in the process of conducting SDC image processing on a depth image can be reduced. According to the scheme, the method particularly includes the steps that an original image block, at least one image processing mode and a depth query table of the depth image to be encoded are acquired, and prediction image blocks corresponding to the image processing modes are acquired; an original direct current component is acquired according to the original image block; a prediction direct current component is acquired according to a pixel value of a pixel point in the prediction image blocks; index residuals are acquired according to the depth query table, the prediction direct current component and the original direct current component; an optimal image processing mode is selected from the image processing modes according to a preset rule; the optimal image processing mode, the index residual corresponding to the optimal image processing mode and the depth query table are encoded to acquire encoding data. The image processing method and device and the system are used for image processing.

Description

technical field [0001] The present invention relates to the field of multimedia, in particular to an image processing method, device and system. Background technique [0002] SDC (Segment-wise Direct Component Coding, region-wise DC component coding) is a residual data coding method applied in 3D-HEVC (High Efficiency Video Coding, high-efficiency video coding standard). When using SDC to perform image processing on the depth image, by establishing a DLT (Depth Lookup Table, depth lookup table) to encode the index residual value into the encoded data and send it to the video decoding device (such as a decoder), the video decoding device then uses the DLT to index The residual value is converted into a depth residual value, and finally the depth residual value is added to the pixel value of each pixel in the corresponding area (such as a predicted image block) to obtain a reconstructed image block. [0003] DC (Direct Component, DC component) is a parameter used for DLT tran...

AI Technical Summary

Problems solved by technology

However, the DLT transformation will generate transformation errors, which will affect the accuracy of the prediction of the depth residual value, and then affect the coding performance when generating the reconstructed image block.

Therefore, there are some methods that try to reduce the transformation error in order to improve the coding performance when generating reconstructed image blocks, but none of them can obtain coding gain, which reflects the degree of improvement in coding performance when generating reconstructed image blocks

[0004] Therefore, the existing improved technology of the traditional method of performing SDC on the depth image cannot reduce the transformation error generated by DLT, and cannot improve the coding performance when generating the reconstructed image block of the depth image

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