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Image processing method and image processing apparatus

An image processing and pixel technology, which is applied in image data processing, image communication, image coding, etc., can solve the problems that cannot be converted into palette pixels, etc.

Active Publication Date: 2016-08-03
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The present invention provides an image processing method and device to at least solve the problem in the related art that any pixel other than the current block cannot be converted into a palette pixel of the current block

Method used

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  • Image processing method and image processing apparatus
  • Image processing method and image processing apparatus
  • Image processing method and image processing apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The palette pixels (or equivalently, the pixel index) are divided into K groups according to the characteristics of predetermined pixel values; for an arbitrary pixel sample value, the conversion method includes at least the following steps:

[0065] According to the characteristics of the above-mentioned predetermined pixel value and the value of the arbitrary pixel sample value, determine that the arbitrary pixel sample value is classified into one of the K groups, that is, determine the optimal group;

[0066] Calculate the distance between the arbitrary pixel sample value and some or all palette pixel sample values ​​in the optimal group, and determine a palette pixel sample value with the optimal distance, that is, determine the optimal color palette Plate pixel samples.

Embodiment 2

[0068] The distance in Embodiment 1 is an error between pixels.

Embodiment 3

[0070] The characteristic of the predetermined pixel numerical value in Embodiment 1 is the characteristic of the magnitude of the numerical values ​​of the three components of the pixel.

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PUM

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Abstract

The invention provides an image processing method and an image processing apparatus. The method comprises the steps of determining a correspondent pixel among all the pixels of a color palette and corresponding to an input pixel, wherein the input pixel comprises a pixel outside the range of the pixels of the color palette; and converting the input pixel into the correspondent pixel of the color palette. According to the technical scheme of the invention, the problem in the prior art that any pixel outside a current block cannot be converted into one pixel of the color palette can be solved. Furthermore, the purpose of converting any pixel outside the current block into the pixel of the color palette within the current block can be realized. Meanwhile, the compression efficiency is improved.

Description

technical field [0001] The present invention relates to the field of digital video compression coding and decoding systems, in particular to an image processing method and device. Background technique [0002] As TVs and monitors enter ultra-high-definition (4K) and ultra-high-definition (8K) resolutions, as well as the development and popularization of a new generation of cloud computing and information processing models and platforms with remote desktops as a typical form, the video image The need for data compression is also moving towards higher resolutions and composite images that include camera ingested images and computer screen images. It has become an indispensable technology to perform ultra-high compression ratio and extremely high-quality data compression on video images. [0003] Make full use of the characteristics of 4K / 8K images and computer screen images to compress video images with ultra-high efficiency. It is also the latest international video compress...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/182H04N19/186
CPCH04N19/182H04N19/186G06T9/00H04N19/103H04N19/196
Inventor 林涛李明尚国强吴钊
Owner TONGJI UNIV