Lossless image compression system

A compression system and lossless image technology, applied in image processing and computer application fields, can solve problems such as information loss

Inactive Publication Date: 2013-12-04
JIANGSU XINRUIFENG INFORMATION TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Generally speaking, this step will bring about the loss of information, and this is the main difference between lossy compression methods and lossless compression methods

Method used

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  • Lossless image compression system

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] The main idea of ​​the present invention is exactly: introduce error correction BCH code into image compression algorithm, improve the compression ratio of image, realize lossless compression, concrete compression steps are as follows:

[0026] (1) The central processing unit in the computer calls the scanning device to scan the original image into a binary digital image, and the format of the image can be any one of pdf / jpg / bmp / tif / png / gif;

[0027] (2) The central processing unit invokes the (7, 4) BCH code encoder to convert the binary digital image scanned in step (1) into a block with a length of 7 generated by 4-bit data;

[0028] The encoding method of the BCH code encoder is to form a code word with a length of n by adding a check bit of m bits to a block with a size of K bits. In this method, we define the size of n a...

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Abstract

The invention discloses a new binary (bit level) lossless image compression system. An error correction BCH (Broadcast Channel) code is introduced into an image compression algorithm; a four-bit binary of each image adds a 3-bit check code to compose a code word in a size of 7; these blocks enter into a BCH decoder, so that the size of the original blocks is reduced to 4 bits after the check bits are removed. The experiment result shows that the compression algorithm is effective, and a very well compression ratio is given without data loss. The use of the BCH code is better than the use of single Huffman compression in the aspect of improving the compression ratio.

Description

technical field [0001] The invention belongs to the field of computer applications, in particular to the field of image processing. Background technique [0002] With the development of informatization, the construction of the current digital urban construction archives has broken through the traditional and closed archives management mode, and realized the transformation of archives work from manual management to computer management. The construction of digital urban construction archives is inseparable from the processing and compression of archive images, and the quality of the processing and compression results directly affects the utilization of archive information. [0003] Image compression falls into two categories: lossy compression and lossless compression. Lossy compression allows images to be somewhat different before compression and after decompression. For lossless compression, the image should be exactly the same before compression and after decompression, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26
Inventor 刘迎春魏华峰
Owner JIANGSU XINRUIFENG INFORMATION TECH
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