Two-dimension bar code system and its positioning method

A two-dimensional barcode and positioning method technology, applied in the field of barcodes, can solve the problems of long strip positioning graphics occupying the barcode position, one-dimensional codes have no error correction function, affecting positioning effects, etc., and achieve a simple and efficient identification method. Complexity and processing time, aesthetic-enhancing effects

Active Publication Date: 2009-05-13
成都市思博睿科技有限公司
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Problems solved by technology

[0007] (2) Strong error correction ability: In terms of encoding algorithm, one-dimensional code has no error correction function
The long bar-shaped positioning graphics occupy more barcode positions and reduce the barcode capacity; the large light-colored interval areas distributed around the bar-shaped area also occupy more information positions, and are easily polluted and affect the positioning effect

Method used

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  • Two-dimension bar code system and its positioning method
  • Two-dimension bar code system and its positioning method
  • Two-dimension bar code system and its positioning method

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Embodiment Construction

[0045] The two-dimensional code system and its positioning algorithm in the present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0046] figure 1 The codeword structure of the two-dimensional code in the present invention is described. The two-dimensional code pattern includes a positioning area 1, a spacer area 2, a data area 3, and a pattern area 4.

[0047] The codeword size of the two-dimensional code can be any N×N size. The code word is composed of a square unit block arrangement,

[0048] The positioning area 1 is composed of four identical positioning graphics. The positioning graphics are located at the top left, top right, bottom left, and bottom right corners of the codeword. Each positioning graphics consists of 2 overlapping concentric graphics, which are 3×3. Dark-colored cell blocks and light-colored circular blocks with an area close to 3.

[0049] The data area is composed of unit blocks that rep...

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Abstract

The invention discloses a 2D bar code system and a locating method thereof. A code word is formed by arranged quadrate cell blocks, and a code word area is divided into a locating area, a spacer area, a data area and a pattern area. A sampled and preprocessed digital image signal is binarized by a maximum between-cluster variance algorithm; and a plurality of deep-color and light-color connected domains are obtained by a fast filling algorithm; a plurality of dead square deep-color and light-color connected domains are selected according to a shape factor and an area factor; then concentric selection is performed to obtain a plurality of candidate location graphs; in succession, square topologic selection is performed to determine an effective code word area, and finally, the space is sampled, thus achieving 2D code location.

Description

Technical field [0001] The invention relates to bar code technology, in particular to a two-dimensional code system and a positioning method thereof. Background technique [0002] A barcode is an optical symbol with a special shape and special arrangement. [0003] At present, one-dimensional barcodes (hereinafter referred to as one-dimensional codes) have been widely used in various fields such as logistics and warehousing, manufacturing, and transportation. The amount of data stored in one-dimensional barcodes is relatively small, and more information can be expressed only by relying on the support of the back-end database. Aiming at the shortcomings of one-dimensional barcodes such as small capacity, poor confidentiality, poor error correction ability, and low confidentiality, a two-dimensional barcode has been produced. [0004] Two-dimensional bar code is abbreviated as two-dimensional code. It uses graphic units of different colors to express specific data information. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/06G06K7/10G06K9/32
Inventor 刘涛
Owner 成都市思博睿科技有限公司
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