Bar code reading method and device

A technology for reading devices and barcodes, applied in electromagnetic radiation induction, instruments, induction record carriers, etc., can solve problems such as inability to use correlation, achieve the effect of improving stability and accuracy, and increasing robustness

Active Publication Date: 2017-02-22
SHENZHEN HUAHAN WEIYE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Secondly, there is a strong correlation between each pixel in the image, and each pixel is not independent, so reading barcodes based on ima...

Method used

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  • Bar code reading method and device
  • Bar code reading method and device

Examples

Experimental program
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Embodiment Construction

[0052] The input image is obtained by taking pictures of the product packaging, and then the barcode in the image is located, and finally the barcode located is decoded and recognized. Among them, there are two key issues:

[0053] One is how to search and locate the barcode area in a complex background. Barcodes can mark the country of origin, manufacturer, product name, production date, book classification number, mail start and end location, category, date and many other information, so it is widely used in many fields such as commodity circulation, book management, postal management, banking system be widely used. Therefore, barcodes can be located on many different items including commodities, books, mail packages, etc. Even for similar items, their outer packaging is also different, which makes the background of the barcode complex. At the same time, due to the location of the barcode on each item It is also likely to be different, which further challenges the position...

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Abstract

The present invention discloses a bar code reading method and device. The method comprising an image acquiring step, a barcode positioning step of locating a bar code from an acquired image, and a barcode recognition step of decoding each bar code region to obtain information represented by each bar code. The bar code positioning step, in particular, comprises: dividing the acquired image into a plurality of non-overlapping regions, and calculating a feature score for each region and determining whether the feature score of the region is greater than a feature score threshold Tconfidence, if yes, making the region as useful, otherwise, discarding the area, wherein when the feature score of any region is calculated, the feature score of the region is equal to the sum of the symbolic contrast percentage score, the gray scale histogram peak difference score, the edge-angle histogram peak difference score, and the edge-angle histogram peak-valley area score, and the regions that are marked as useful are combined to obtain a number of merged barcode regions.

Description

technical field [0001] The application relates to a barcode reading method and device. Background technique [0002] At present, the devices for reading barcodes are mainly barcode scanners. By manual operation, the laser scanner is aimed at and close to the barcode, and the barcode is scanned, input and recognized. However, if the barcode printing quality is not up to standard or there is breakage or contamination during transportation, it will seriously affect the accuracy of barcode recognition. In this case, the technology of reading barcodes based on image processing is more advantageous. [0003] First of all, the laser scanner only uses one laser beam to scan the image. If some parts of the barcode are stained, errors may occur. Using image processing technology, the information of the entire barcode area can be used, and errors will not be caused by partial loss. . [0004] Secondly, there is a strong correlation between each pixel in the image, and each pixel is ...

Claims

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Application Information

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IPC IPC(8): G06K7/14
CPCG06K7/1413G06K7/1439
Inventor 杨洋
Owner SHENZHEN HUAHAN WEIYE TECH
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