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Method and device for compressing composite image

A composite image and compression device technology, applied in the field of image processing, can solve the problem of low image compression efficiency

Inactive Publication Date: 2014-04-02
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present invention provides a composite image compression method and device, aiming to solve the technical problem of low image compression efficiency in the prior art

Method used

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  • Method and device for compressing composite image
  • Method and device for compressing composite image
  • Method and device for compressing composite image

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Embodiment 1

[0031] figure 1 The implementation process of the composite image compression method provided by Embodiment 1 of the present invention is shown, and the details are as follows:

[0032] In step S1, the composite image is segmented according to image features to obtain several segmented areas, the image features include color and grayscale, and the segmented areas include text / graphic areas and image areas.

[0033] In this embodiment, the image features include color and grayscale. The composite image is a type of mixed image including text, graphics and natural image information, such as desktop images and web pages. The sub-block is a sub-block of a composite image including several pixels. Specifically, the composite image is divided into 16*16 sub-blocks. A continuous-tone image has a large number of colors in a small area, but only a small number of colors in a large area of ​​text / graphics. The different characteristics of the gradient value of the pixels are divided...

Embodiment 2

[0073] Image 6 A specific structural block diagram of the apparatus for compressing a composite image provided in Embodiment 2 of the present invention is shown. For convenience of description, only parts related to the embodiment of the present invention are shown. In this embodiment, the device for compressing a composite image includes: an image segmentation unit 61 and a compression unit 62 . The image segmentation unit 61 includes an image block subunit, a first classification subunit, a second classification subunit and a third classification subunit.

[0074] Wherein, the image segmentation unit 61 is used to segment the composite image according to the image features to obtain several segmented areas, the image features include color and grayscale, and the segmented areas include text / graphic areas and image areas;

[0075] The compressing unit 62 is configured to compress the plurality of segmented regions by using corresponding coding methods respectively.

[0076...

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Abstract

The invention is suitable for the technical field of image processing, and provides a method and a device for compressing a composite image. The method comprises the following steps: S1, partitioning the composite image according to image features to obtain a plurality of partitioned areas, wherein the image features include color and grayscale, and the partitioned areas include a text / graph area and an image area; S2, compressing the partitioned areas by adopting a corresponding encoding way respectively. In the method, the composite image is partitioned into text / graph partitioned areas and natural image partitioned areas according to information of different features included in the composite image, so that corresponding compression methods can be adopted for different partitioned areas, and high compression ratio is ensured. Meanwhile, the text / graph areas are clear and readable after being reconstructed.

Description

technical field [0001] The invention belongs to the technical field of image processing, in particular to a method and device for compressing composite images. Background technique [0002] With the rapid development of computer networks, people are paying more and more attention to real-time desktop image transmission technology. At present, image transmission technology is widely used in fields such as distance teaching, remote office, network multimedia conference and product demonstration. At the same time, network-based voice, text, and video can no longer meet people's needs. People begin to use the network to achieve remote control and monitoring. Using this image transmission technology, not only can communicate with other remote computers on current digital devices Interactive, but also can manipulate remote computers to solve problems that cannot be solved by current resources. [0003] Since the realization of this kind of multi-screen interaction requires the tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T9/00
Inventor 张艳
Owner TCL CORPORATION
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