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Color two dimension bar code with high compression ratio Chinese character coding capability and its coding and decoding method

A two-dimensional barcode and Chinese character coding technology, which is applied to the recording carrier used by the machine, the instrument, the induction recording carrier, etc., can solve the problems of small information capacity, low compression ratio of Chinese characters, and low information density of barcodes.

Inactive Publication Date: 2009-08-26
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the existing two-dimensional barcodes, such as low compression ratio of Chinese characters, low information density of barcodes, and less information capacity per unit area, the present invention provides a method that effectively improves the compression ratio of Chinese characters, increases the information density of barcodes, and increases the Color two-dimensional barcode with high compression ratio Chinese character encoding capability and its encoding and decoding method with information capacity per unit area

Method used

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  • Color two dimension bar code with high compression ratio Chinese character coding capability and its coding and decoding method
  • Color two dimension bar code with high compression ratio Chinese character coding capability and its coding and decoding method
  • Color two dimension bar code with high compression ratio Chinese character coding capability and its coding and decoding method

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Embodiment 1

[0062] Refer to Figure 1 ~ Figure 4 , A color two-dimensional barcode with high compression ratio Chinese character encoding capability, the entire barcode image of the color two-dimensional barcode is composed of regularly arranged rectangular modules, the entire barcode image includes a functional image and a data area, and the functional image is a color The four sides of a two-dimensional barcode, where the left side is composed of two color blocks with different optical characteristics alternately, the lower side is composed of single color blocks, and the upper and right sides are composed of different optical blocks in the order from left to right and bottom to top. The characteristic four-color modules are alternately composed; the data area is the middle part of the square, and the data area is alternately composed of two mutually perpendicular two-color modules with different optical characteristics; the codewords in the data area are arranged according to Arrange from l...

Embodiment 2

[0081] Refer to Figure 5 , Figure 6 with Figure 7 , A color two-dimensional barcode encoding method with high compression ratio Chinese character encoding capability, including:

[0082] (1) Encode the source data information stream into a hexadecimal data bit stream according to the data information encoding rules, calculate the length of the data bit stream, and convert the data bit stream length into a six-digit hexadecimal number and add it to the original data bit stream Form a new data bit stream before, and the length of the data bit stream is k;

[0083] (2) According to the data bit stream length k, select the minimum size bar code with the data bit stream length greater than the data bit stream length k in the data area, and add padding characters to supplement the part of the data less than the fixed data length;

[0084] (3) Combine the new data bit stream into a codeword by 4 bits, generate error correction codewords according to the Reed-Solomon error correction a...

Embodiment 3

[0132] Refer to Figure 8 with Picture 9 , A method for decoding color two-dimensional bar codes with high compression ratio Chinese character encoding capability, including:

[0133] (1) The image is preprocessed, and the red, green, and blue channels of the image are binarized separately;

[0134] (2) According to the function image of the barcode image in any one of the red, green, and blue channels or combining the characteristics of any two color channels, perform barcode area positioning and barcode image correction; if the barcode image has a color cast phenomenon, it can Perform color cast correction based on alternating color modules with different optical characteristics of functional images;

[0135] (3) According to the functional image of the barcode image, perform code word segmentation on the data image of the entire barcode image, and convert the segmented image information into corresponding code words;

[0136] (4) Use Reed-Solomon error correction algorithm to ...

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Abstract

The invention discloses a color two dimension bar code with high compression ratio Chinese character coding capability, the whole bar code image comprises rectangular modules which are regularly ranged and includes a functional image and a data area, the functional image is the four sides of the color two dimension bar code, wherein the left side comprise two alternate color blocks with different chemical feature, the lower side comprises single color block, the upper side and the right side comprises four alternate color modules with different chemical feature from left to right and from bottom to up; the data area is the middle part of square and comprises two alternate two-color modules which are vertical and have different chemical feature, the code words in the data area are arranged from left to right and from the up down. The invention also provides a method for coding and decoding the color two dimension bar cod. The invention effectively improves the compression ratio of Chinese character, the information density of the bar code and the information content of the unit area.

Description

Technical field [0001] The invention relates to a two-dimensional bar code and its encoding and decoding methods. Background technique [0002] Bar code technology has become one of the main computer automatic identification technologies today, and it is an important method and means for automatic identification and input of information and data. It is widely used in industry, commerce, national defense, transportation, finance, medical and health, post and telecommunications, and office automation. In various fields, they have made great contributions to the scientific and modernization of management. Currently, barcodes are divided into one-dimensional barcodes and two-dimensional barcodes. One-dimensional barcodes generally only express information in the horizontal direction, so they have shortcomings such as small information capacity, only letters and numbers, low recognition rate, and weak anti-interference ability, which greatly limit their scope of use. In the 1990s, two...

Claims

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Application Information

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IPC IPC(8): G06K19/06G06K7/00
Inventor 郑河荣袁远松赵小敏
Owner ZHEJIANG UNIV OF TECH
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