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Novel color image coding method

A color image and coding method technology, applied in the field of color image coding, can solve the problems of not being able to guarantee the optimal interpolation of RGB color images, restricting the compression efficiency of color image coding, etc.

Active Publication Date: 2017-04-26
成都睿图信通科技有限公司
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AI Technical Summary

Problems solved by technology

Such an implementation method cannot guarantee the overall optimal interpolation of RGB color images, so it also restricts the encoding and compression efficiency of color images

Method used

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Embodiment Construction

[0085] The present invention mainly adopts the mode of simulation experiment to verify the feasibility of the system model, and all steps have been verified by experiment. In order to realize the image compression based on the transform domain down-sampling technology, the specific implementation steps are as follows:

[0086] Step 1, image preprocessing

[0087] First, record the original RGB color image with a resolution of w×h as X, where w is the width of the image, and h is the height of the image;

[0088] Secondly, the three color component images of red, green and blue are extracted according to the standard method of extracting RGB image components, and the extracted three color component images of red, green and blue are respectively recorded as R, G and B, where R, G and The resolution of B is w×h;

[0089] Then, then, make the width and height of each square image block be 8, i.e. n=8; divide R into N=(w×h) / 8 according to the standard non-overlapping image block m...

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Abstract

The invention provides a novel color image coding method. The method is characterized by, according to the characteristic that a transfer matrix between RGB and YCbCr color space is a non-unitary matrix, that is, unequivalence of error between RGB images and YCbCr images, with minimization of interpolation error of an RGB space being an objective, carrying out combined optimized filtering on three components of Y, Cb and Cr, after filtering, the resolution of the component Y keeping unchanged, and the resolutions of the two components Cb and Cr being reduced; after finishing filtering, carrying out compression on the three components through a standard JPEG image compression method; and carrying out coding on the RGB images based on the above, so that coding efficiency is improved greatly. The method can improve coding efficiency of the RGB color images, is not high in complexity and is easy to realize.

Description

technical field [0001] The invention belongs to the field of image compression, and mainly relates to a novel color image coding method. Background technique [0002] With the advent of the era of big data, there is an increasing demand for efficient high-color-fidelity image compression methods. In the face of this growing demand and the current limitation that most display devices only support RGB color video input, how to It is particularly important to achieve high-efficiency encoding of RGB color images. There is a large amount of color redundancy between the three color channels in the RGB color image. Therefore, in order to achieve efficient compression of the RGB image, it is first necessary to convert the RGB image into a YCbCr image and then compress it. A YCbCr image consists of a luminance component (denoted as Y) and two chrominance components (respectively denoted as Cb and Cr). Inside each chrominance component, there is a large amount of spatial redundancy....

Claims

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Application Information

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IPC IPC(8): H04N19/625H04N19/186H04N19/124H04N19/176
CPCH04N19/124H04N19/176H04N19/186H04N19/625
Inventor 朱树元李明宇
Owner 成都睿图信通科技有限公司
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