Printing and scanning recognition method and system for two-dimensional code of special value-added tax invoice

Abstract

The invention provides a scanning recognition method and system for a matrix type two-dimensional code image of a special value-added tax invoice. The method comprises the following steps of: processing content information for printing the special value-added tax invoice to form a character string; representing a binary '1' module through four printing points to obtain a matrix type two-dimensional code of the character string; printing the content information and the matrix type two-dimensional code on the special value-added tax invoice; scanning to obtain a whole image of the special value-added tax invoice to be recognized; cutting out matrix type two-dimensional code images of the whole image and carrying out decoding treatment on the matrix type two-dimensional code images; and outputting decoding data information of the matrix type two-dimensional code images. According to the invention, a condition of punching the invoice is effectively avoided when a needle type printer is used for printing the two-dimensional code of the multi-copy special value-added tax invoice; meanwhile, the information capacity of a unit area is improved; the printing and scanning recognition method and system provided by invention also can be used for recognizing the condition that a file paper surface contains a plurality of the two-dimensional code images and the recognition efficiency is high.

Description

technical field [0001] The invention relates to the field of bill anti-counterfeiting, in particular to a printing and scanning recognition technology of a two-dimensional code image of a value-added tax special invoice. Background technique [0002] Compared with the existing barcodes and digital passwords, the two-dimensional code has the advantages of small printing area and large capacity. The use of the two-dimensional code has become the current trend, but for the multi-part VAT invoice, the pin type must be used. The printer prints. In the existing two-dimensional code dot matrix printing, a 2*2 or 3*3 printing dot matrix is ​​used to form a module, and multiple blanks need to be reserved at the same time, which is conducive to the identification of equipment for printing. Module identification, but this printing method has the following problems: [0003] First of all, because the modules that represent "1" need to print 2*2 or 3*3 dots densely, during the printing...

AI Technical Summary

Problems solved by technology

[0002] Compared with the existing barcodes and digital passwords, the two-dimensional code has the advantages of small printing area and large capacity. The use of the two-dimensional code has become the current trend, but for the multi-part VAT invoice, the pin type must be used. printer to print

Using a barcode gun to identify a QR code image is inconvenient and inefficient in some environments

Usually there are multiple QR codes printed on the processed documents, and the existing QR code recognition system needs to obtain the information of each QR code image on the file when processing these files, so the business process has such characteristics: the operator It is necessary to hold the document in one hand and scan each QR code image on the document in turn with the barcode gun in the other hand. When two QR code images are adjacent to each other, it is easy to cause misreading. One QR code image that has been read is covered, and then another QR code image is read. It is not completed until all the QR code images are read. This series of operations is very cumbersome and laborious, especially when there are not several When there are thousands of documents, such work efficiency and work characteristics will undoubtedly bring a heavy burden to the operators

[0006] The inconvenience of the above business problem is that when processing documents, if each document has multiple QR code images, the scanning operation needs to be performed multiple times, and the decoding of the QR code images also needs to be performed multiple times

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