Sampling grid partitioning method and sampling grid partitioning device for matrix two-dimensional barcode

Abstract

The invention discloses a sampling grid partitioning method and a sampling grid partitioning device for a matrix two-dimensional barcode. The method comprises the following steps: taking the positions of peaks in a horizontal gradient projection of a two-dimensional barcode image in the horizontal direction and in a vertical gradient projection of the two-dimensional barcode image in the vertical direction as the positions of vertical segmentation lines and horizontal segmentation lines used to segment the two-dimensional barcode image; adjusting the vertical segmentation lines according to the column number of the two-dimensional barcode image and the module width in the horizontal direction; adjusting the horizontal segmentation lines according to the row number of the two-dimensional barcode image and the module width in the vertical direction; and partitioning the sampling grid of the two-dimensional barcode image according to the vertical segmentation lines and the horizontal segmentation lines after adjustment. The method provided by the invention makes use of the rich gradient features in the two-dimensional barcode image, and has low requirement on module orderliness and module size consistency. The method does not depend on the characteristics of a locator, and is of very high adaptability and robustness. Higher rate of decoding is achieved in the subsequent decoding process.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a sampling grid division method and device for a matrix two-dimensional code. Background technique [0002] Two-dimensional bar code (2-dimensional bar code) records data symbol information with a specific geometric figure distributed on a plane (two-dimensional direction) according to certain rules. The concept of "0" and "1" bit streams based on internal logic uses several geometric shapes corresponding to binary to represent text and numerical information, which can be automatically read by image input equipment or photoelectric scanning equipment to realize automatic processing of information. According to the realization principle and structural shape difference of two-dimensional code, it can be divided into stacking two-dimensional code and matrix two-dimensional code, among which matrix two-dimensional code mainly includes Code One, MaxiCode, QR Code, Data Matrix...

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a sampling grid division method and device for a matrix two-dimensional code, which is used to solve the problem in the prior art that the sampling grid for a matrix two-dimensional code cannot be reasonably divided

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