Two-dimension code preprocessing method and device

A preprocessing and two-dimensional code technology, which is applied in the field of two-dimensional codes, can solve problems such as barcode image binarization processing, and achieve the effect of eliminating uneven illumination and improving recognition rate

Inactive Publication Date: 2014-07-23
胡建国
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Problems solved by technology

[0006] In view of the deficiencies in the prior art and the inability to perform accurate binarization processing on barcode images in the binarization processing, the embodiment of the present invention provi

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  • Two-dimension code preprocessing method and device

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0028] In the embodiment of the present invention, in the process of two-dimensional code preprocessing, adaptive brightness equalization processing is performed on the collected pictures in the step of light equalization, and the parts that are too dark and too bright in the image are removed; In the step, the Otsu algorithm is used to binarize the image after adaptive brightness equalization processing, thereby effectively eliminating the influence of uneven illum...

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Abstract

The invention discloses a two-dimension code preprocessing method which comprises the following steps of luminance equalization: performing self-adaptation brightness equalization processing on the captured images to remove a too faint part and a too bright part in each image; binarization processing: performing binarization processing on the images subjected to the self-adaptation brightness equalization processing through an Otsu's method. The invention further discloses a two-dimension code preprocessing device which comprises a luminance equalization processing module for performing self-adaptation brightness equalization processing on the captured images to remove the too faint part and the too bright part in each image and a binarization processing module for performing binarization processing on the images subjected to the self-adaptation brightness equalization processing through the Otsu's method. By means of the two-dimension code preprocessing method and device, effect caused by uneven illumination in the bar code images is eliminated effectively, binarization can be performed on the bar code images with uneven illumination correctively, and the recognition rate of two-dimension codes is increased.

Description

technical field [0001] The invention relates to the technical field of two-dimensional codes, in particular to a method and device for preprocessing two-dimensional codes. Background technique [0002] A two-dimensional bar code (2-dimensional bar code) is a black and white graphic that distributes specific geometric figures on a plane according to certain rules. It is a kind of data symbol information. Two-dimensional codes have many significant advantages, such as high coding density, large information capacity, wide coding range, strong error correction ability, easy production, and low production cost. Due to the above reasons, two-dimensional codes have been widely used in many fields of life, such as logistics, medical and health, transportation, production and so on. [0003] Image readers usually include barcodes and other irrelevant background information when capturing two-dimensional barcodes, making the information in the photo very complicated. Moreover, due t...

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Application Information

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IPC IPC(8): G06T5/00G06T7/00
Inventor 胡建国
Owner 胡建国
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