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A method for compressing digitalized archive file using computer

An archival file, computer technology, applied in computing, electrical components, image data processing and other directions, can solve problems such as improvement and difficult compression rate

Inactive Publication Date: 2004-11-10
南宁海蓝数据有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

They are all pixel-based compression methods, so it is difficult to further improve the compression rate

Method used

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  • A method for compressing digitalized archive file using computer
  • A method for compressing digitalized archive file using computer
  • A method for compressing digitalized archive file using computer

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Embodiment Construction

[0022] Below, the present invention will be further described in conjunction with the accompanying drawings.

[0023] Depend on figure 1 As can be seen from the flowchart of the compression algorithm of the present invention, the compression algorithm includes two parts: symbol extraction, reordering, and symbol encoding. In the first part, the extraction of symbols in the binary bitmap and the reordering of symbols are completed; in the second part, the process of encoding the proposed symbols is realized. The details are as follows:

[0024] (1) Symbol extraction and reordering

[0025] 1. Symbol extraction

[0026] Symbol extraction uses conventional edge tracking and area filling methods to extract the symbol from the bitmap. On this basis, we also need to extract some important features of the symbol, such as the center of mass and area of ​​the symbol. These features are used in symbol comparison and classification plays an important role.

[0027] Symbol extractio...

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Abstract

The invention discloses a method of compressing digital document files by computer, including: computer and digital binary graphics and text document files, where during the course of processing by the computer, the document files are operated by the following algorithm, which includes the steps: extracting symbols from the binary graphics and text and reordering, and symbol coding. It makes a symbol-based non-graphic pixel compression on the document files, heightens the compression ratio by 50 percentage points in comparison with PDG algorithm of Superstar and by 30 percentage points in comparison with NLC algorithm of the National Library. And it is applied to compression and management of document files.

Description

technical field [0001] The invention relates to a method for processing image data by using a computer, especially a method for compressing digitized archive files by using a computer. Background technique [0002] At the end of 2002, the "National Economic and Social Development Tenth Five-Year Plan Informatization Key Special Plan" promulgated by the Chinese government clearly pointed out that information resources are the core of informatization when defining the connotation of informatization, and digitization of paper archives has become It is a common and critical problem in information construction, and the compression of digitized documents is the core problem in the core. High-efficiency and high-quality compression algorithms can save storage costs, increase the speed of file transmission on the network and the speed of image decompression and restoration during data sharing. [0003] The technology of storing and managing digital archival files in the form of bin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T9/20H03M7/30
CPCH03M7/30
Inventor 廖宏
Owner 南宁海蓝数据有限公司
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