Bar code image identification method

A barcode image and recognition method technology, which is applied in the field of computer automatic information recognition, and achieves the effect of easy threshold selection, good reading, and improved adaptability and robustness.

Inactive Publication Date: 2011-07-27
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is:...

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Embodiment Construction

[0049] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0050] Such as figure 1 Shown, method of the present invention comprises the following steps:

[0051] S1. First, grayscale the color image collected by the camera of the mobile phone.

[0052] Most mobile devices collect color images, and the storage of color images takes up more space than grayscale images, and the processing time is much longer than that of grayscale images. At the same time, the barcode is printed in black and white, so in the process of reading the barcode, the color information component in the actual shot barcode image has no effect on the barcode recognition, so it is necessary to convert the color image into a grayscale image in order to reduce the...

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Abstract

The invention disclose a bar code image identification method, belonging to the field of computer information automatic identification technology, the method comprises the following steps: S1. carrying out gradation to a colored image which is captured by an Android mobile phone camera, wherein the colored image is a bar code image; S2. conducting median filtering processing to a grayed image; S3. conducting binaryzation processing to the image which carries out the median filtering processing; S4. conducting bar code positioning to the image which carried out the binaryzation processing; S5. conducting geometric distortion correction to the positioned image; and S6. decoding the corrected image, so as to obtain a code word of the image. In the invention, the precision of the bar code identification is improved and the complexity is reduced.

Description

technical field [0001] The invention relates to computer information automatic recognition technology, in particular to a barcode image recognition method. Background technique [0002] The common electronic barcode is a widely used one-dimensional barcode technology. The international common encoding methods include various standards such as EAN-8, EAN-13, UPC-A and UPC-E, which have been widely used; however, the information contained in it The amount is quite small, and it is limited to the use of numbers. It is no longer used in this era of information explosion. Due to the advancement of information technology and hardware development, we can expand the capacity of electronic barcodes, thus producing the standard and technology of two-dimensional barcodes. Common international standards for two-dimensional barcodes include PDF417, Data Matrix, MaxiCode, and QR Code. In addition to numbers and symbols, some coding methods can also be added to the language and text sets o...

Claims

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Application Information

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IPC IPC(8): G06K7/10G06K9/60
Inventor 孙明赵凡
Owner CHINA AGRI UNIV
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