Method, device and system for compressing and decompressing transparent images

A transparent image and compression method technology, applied in the field of digital images, can solve the problems of not removing space redundancy, loss, and affecting image quality, so as to reduce the consumption of storage space and bandwidth resources and improve compression efficiency

Inactive Publication Date: 2011-04-27
TENCENT TECH (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For transparent images, the lossless compression method is adopted without removing redundant data such as spatial redundancy and visual redundancy contained in the image information, so the compression efficiency is far lower than JPEG (Joint Photographic Experts Group, Joint Photographic Experts Group), JPEG2000 and other commonl

Method used

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  • Method, device and system for compressing and decompressing transparent images
  • Method, device and system for compressing and decompressing transparent images
  • Method, device and system for compressing and decompressing transparent images

Examples

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Embodiment 1

[0064] In order to improve the compression efficiency of transparent images without significantly reducing the subjective quality of images, an embodiment of the present invention provides a method for compressing transparent images, see figure 1 , the method includes:

[0065] 101: Obtain color channel information and transparent color channel information of the original transparent image;

[0066] Among them, it is necessary to analyze the original transparent image to separate the transparent color channel information and the information of each color channel; to analyze the original transparent image, image processing software or other tools can be used, as long as the transparent color channel information can be separated and the information of each color channel, which is not limited in this embodiment of the present invention.

[0067] Among them, the color channel information and transparent color channel information of the original transparent image are obtained, spe...

Embodiment 2

[0089] In order to improve the compression efficiency of transparent images without significantly reducing the subjective quality of images, an embodiment of the present invention provides a method for compressing transparent images, using lossless compression for transparent color channel information and lossy compression for each color channel information , and organize the compressed transparent color channel information and color channel information according to a specific format, thereby improving the compression efficiency of the transparent image. The specific content is as follows:

[0090] First, the compression method for transparent images provided by the embodiment of the present invention is described in detail:

[0091] see figure 2 , realize the transparent image compression system device of the embodiment of the present invention: first, the original format analysis is performed on the original transparent image, and then LZW compression is performed on the t...

Embodiment 3

[0123] An embodiment of the present invention provides a transparent image compression device, see Figure 5 , the device consists of:

[0124] An acquisition module 301, configured to acquire color channel information and transparent color channel information of the original transparent image;

[0125] A compression module 302, configured to perform lossy compression on color channel information to obtain color channel compression information, and perform lossless compression to transparent color channel information to obtain transparent color channel compression information;

[0126] The data synthesis module 303 is configured to perform compressed data synthesis on the compressed information of the color channel and the compressed information of the transparent color channel to obtain a compressed transparent image.

[0127] Wherein, the data synthesis module 303 includes:

[0128] The data format synthesis unit is used to compress the color channel compression informatio...

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Abstract

The invention discloses a method, a device and a system for compressing and decompressing transparent images and belongs to the field of digital images. The method comprises the following steps of: acquiring color channel information and transparent color channel information of original transparent images; performing loss compression on the color channel information to obtain color channel compression information, and performing lossless compression on the transparent color channel information to obtain transparent color channel compression information; and performing compression data synthesis on the color channel compression information and the transparent color channel compression information to obtain compressed transparent images. By the scheme provided by the invention, the transparent color channel information of the transparent images is subjected to lossless compression, while the color channel information is subjected to loss compression, the compressed transparent color channel information and color channel information are organized according to a specific format, redundancy contained in the image information is removed to the greatest extent, the compression efficiency of the transparent images is improved and the subjective quality of the images is not obviously reduced.

Description

technical field [0001] The invention relates to the field of digital images, in particular to a method, device and system for compressing and decompressing transparent images. Background technique [0002] With the development and widespread application of Internet technology, the network is increasingly affecting people's work and lifestyle. Because the picture information has the characteristics of strong intuition and rich content, a large number of pictures are used in websites and online games. Each pixel of these color digital images usually contains three color channel information of red (R), green (G), and blue (B), and each color channel information of each pixel generally needs to be represented by 8 bits . [0003] Transparent images are images that are widely used in Internet webpage production and games. It is based on general color digital images, adding an 8-bit transparent color channel to each pixel, and recording the transparency information of the pixel....

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N1/41
CPCH04N7/3011H04N19/00848G06T9/00H04N7/26643H04N19/649
Inventor 谷沉沉刘俊何健
Owner TENCENT TECH (SHENZHEN) CO LTD
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