Cylindrical surface bidimensional bar code reading method based on image splicing

A technology of two-dimensional barcode and image stitching, which is applied in the direction of electromagnetic radiation induction, and can solve problems such as cylinder distortion, incomplete collection information, and uneven illumination of two-dimensional barcodes on cylinders.

Inactive Publication Date: 2012-09-19
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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Problems solved by technology

[0010] In order to solve the problems existing in the prior art, the present invention proposes a method for reading cylindrical two-dimensional barcodes based on image stitching. By studying the characteristics of the Data Matrix barcode images marked on the cylinder, a new image stitching method is designed to achieve Solve the problems of uneven illumination, cylinder distortion, and incomplete collection information when reading cylindrical two-dimensional barcodes, so as to achieve fast and accurate acquisition of high-quality two-dimensional barcode images, realize cylinder information collection, and improve cylinder two-dimensional The purpose of dimensional barcode reading efficiency

Method used

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  • Cylindrical surface bidimensional bar code reading method based on image splicing
  • Cylindrical surface bidimensional bar code reading method based on image splicing
  • Cylindrical surface bidimensional bar code reading method based on image splicing

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Embodiment Construction

[0088] Describe the present invention below in conjunction with specific embodiment:

[0089] In this example, a cylindrical metal of Φ6 is used, and a set of sequence images are collected with MV1300 under the reading tool. In this example, the camera parameters are selected as follows: shutter speed 10us, gain adjustment 60, acquisition speed is high speed. In order to achieve the above object, the overall process of the technical solution of the present invention is as follows: figure 1 shown.

[0090] Step 1: Under the reading tooling, adjust and reduce the gap of the baffle until there is no highlight reflection in the collected barcode image, and then rotate and continuously collect N images of the two-dimensional barcode The N images contain all the information of the two-dimensional barcode; the width of each image is w=97, the height is h=384, Represents the nth image Mvtemp n The pixel value of the pixel in column i and row j in . In this embodiment, 8 images ...

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Abstract

The invention provides a cylindrical surface bidimensional bar code reading method based on image splicing. The method comprises the following steps of: acquiring a group of bidimensional bar code pictures in a rotatable manner, correcting non-uniform image illumination, enhancing edge information of bar codes, identifying bar code images and bar code positions, classifying bar code modules, roughly registering the bar code images, finely registering the bar code images, splicing the images and identifying the bar codes.. The identification theory based on an image of the conventional bidimensional bar code identification system is changed, so that cylindrical surface bar code information can be completely acquired, and the problems of distortion, non-uniform illumination and the like of the cylindrical surface bar codes can be solved. According to the characteristic of a Data Matrix bidimensional bar code image, the outstanding problems of low correctness, low efficiency and the like during splicing of bidimensional bar code images can be well solved by the designed splicing fusion algorithm; and the cylindrical surface bidimensional bar code information can be read quickly and accurately.

Description

technical field [0001] The invention relates to the technical field of cylindrical two-dimensional barcode reading, in particular to a cylindrical two-dimensional barcode reading method based on image splicing. Background technique [0002] Fast and accurate reading of two-dimensional barcodes directly marked on the surface of products is the basis for product lifecycle management and information tracking, and is the key to improving inventory management efficiency and realizing production process information collection and real-time tracking. At present, the two-dimensional Data Matrix barcode is often used as the permanent two-dimensional barcode of the product, because the Data Matrix barcode has a large encoding capacity, high density, and strong error correction capability. [0003] The current two-dimensional barcode reading methods all use a CCD camera to capture an image containing a two-dimensional barcode, and then perform a series of processing on the image to rem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/10
Inventor 何卫平林清松雷蕾王伟刘涛
Owner NORTHWESTERN POLYTECHNICAL UNIV
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