Image compression method

An image compression, image block technology, used in image communication, television, electrical components, etc.

Active Publication Date: 2008-01-16
逐点半导体(上海)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an image compression method for the defects of the existing image compression method, which can use different compression methods for embedded compression for different contents in the image, and the image compression effect is very good

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Embodiment Construction

[0030] The invention is an embedded compression method based on image content with a fixed compression rate, which can adaptively adopt different compression methods for embedded compression based on different image contents, and realize high-quality image compression with less resources.

[0031] The image compression method of the present invention comprises the steps:

[0032] Step 1, perform grayscale detection on the image block segmented from the original image data, if it is a grayscale image block, then perform step 2; otherwise, perform step 3;

[0033] Step 2, perform lossless compression on the grayscale image block, and perform step 6;

[0034] Step 3, calculate the number of different pixel values ​​in the image block, if the number of different pixel values ​​in the image block does not exceed the first threshold value, then perform step 4, if the number of different pixel values ​​in the image block exceeds For the first domain value, execute step 5;

[0035] ...

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Abstract

The invention relates to an image compression method, including the following steps: step (1), conduct gray scale detection on image blocks separated from the original image data, if gray image block, then execute step (2); otherwise execute step (3); step (2), conduct lossless compression on the gray image block, and execute step (6); step (3), calculate the number of different pixel values in the image block, if the number of different pixel values in the image block doesn't exceed the first threshold value, then execute step (4), if the number of different pixel values in the image block exceeds the first threshold value, then execute step (5); step (4), conduct lossless compression on the image block, and execute step (6); step (5), conduct lossy compression on the image block, and execute step (6); step (6), end. Therefore, the image compression method in the invention can self-adapt to adopting different compression methods based on difference of image contents, and use less resource to realize high quality image compression.

Description

technical field [0001] The invention relates to an image compression method, in particular to an embedded image compression method for performing double compression rate compression according to image content. Background technique [0002] In recent years, with the development of the times, people's living standards have been improving day by day, which has promoted the progress of electronic integration technology, and the size and resolution of various display devices have continued to increase. An increase in resolution means an increase in the number of pixels per frame of picture, so that the amount of data that needs to be processed during video and image processing will increase sharply, and the cost of video and image processing will also increase accordingly. [0003] Generally speaking, as the resolution supported by the image processing chip increases, the cost of the chip will also increase. This is because the increase in image resolution increases the amount o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N19/103H04N19/156H04N19/176
Inventor 李蔷
Owner 逐点半导体(上海)股份有限公司
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