Method for correcting distortion of two-dimension bar figure
A two-dimensional barcode and graphic distortion technology, applied in the field of automatic identification, can solve the problems of low data restoration efficiency, difficulty in reading, graphic distortion of two-dimensional barcodes, etc.
Active Publication Date: 2009-06-24
ARTICLE NUMBERING CENT OF CHINA
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[0012] In order to solve the problems of difficulty in reading and low data restoration efficiency caused by distortion, damage and irregular graphics in two-dimensional barcode graphics, the present invention provides a method for correcting distortion of two-dimensional barcode graphics
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[0037] figure 2 It is a schematic diagram of the structure of the Chinese Sensible Code, and the overall structural design of the Chinese Sensible Code has obvious characteristics different from the existing two-dimensional barcodes. The code map graph is a square composed of n×n modules, where n is related to the version number, and the graph storage capacity of different version numbers is different, and n is different. The Chinese Sensible code symbol is composed of image-finding graphics 1, functional information area 5, correction graphics 2, auxiliary correction graphics 3 and information coding area 4 arranged at the four vertices of a rectangular area. The information coding area includes data coding, error correction coding and Fill in information such as codewords. The image-finding figures in Chinese Sensible Code have the same shape, but they are placed in different directions, such as figure 2 As shown, the image finding patterns located in the upper right cor...
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The invention discloses a method for correcting the distortion of a two-dimensional bar code pattern, comprising: searching for a finder pattern in a read code pattern; obtaining version information from a function information area near the finder pattern; obtaining a standard two-dimensional code according to the version information The image space of the two-dimensional barcode graphic is determined and the coordinates of the sampling points in the two-dimensional barcode graphic are determined; each data element in the two-dimensional barcode graphic is transformed into the data element of the standard two-dimensional barcode graphic image space. The invention divides the entire barcode pattern into several sub-regions according to the structure of the two-dimensional bar code pattern and the correction pattern, and performs block correction, has fast image processing speed and high correction accuracy, and can be widely used in various fields of automatic identification. The invention can effectively solve the problems of distortion, damage and irregular graphics in the two-dimensional bar code graphics and slow subsequent reading speed, can provide corrected graphics, and provide standard symbol graphics for subsequent reading and decoding. .
Description
technical field [0001] The invention relates to a graphic correction method in automatic identification technology, in particular to a method for correcting distorted two-dimensional barcode graphics, which belongs to the technical field of automatic identification. Background technique [0002] Barcode technology is an emerging technology that integrates coding, printing, identification, data collection and processing developed on the basis of computer technology and information technology. The barcodes printed on commodity packaging that people see every day are ordinary one-dimensional barcodes. As an automatic identification technology, since the one-dimensional barcode came out in the early 1970s, it has been favored by people due to its advantages of fast, accurate, reliable and low production cost, and has been widely used in business, books, etc. Management, warehousing, post and telecommunications, transportation and industrial control and other fields. [0003] A...
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IPC IPC(8): G06K9/00
Inventor 张成海罗秋科王毅黄燕滨王越杨楚威
Owner ARTICLE NUMBERING CENT OF CHINA