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A method for locating multiple barcodes

A positioning method and barcode technology, applied in the field of image processing, can solve problems such as not easy to distinguish, and achieve the effect of low price, high efficiency, and low configuration level

Inactive Publication Date: 2018-12-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is roughly manifested in the following aspects: First, the algorithm is easy to mix with the background in a more complex background, and it is not easy to distinguish; the other is that many algorithms cannot complete the detection of multiple barcodes in a picture

Method used

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  • A method for locating multiple barcodes
  • A method for locating multiple barcodes
  • A method for locating multiple barcodes

Examples

Experimental program
Comparison scheme
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Embodiment

[0048] Such as figure 1 Shown is a specific flow chart of a barcode positioning method based on image edge detection features, the steps of the method include:

[0049] (1) Preprocessing the detected image to obtain a binarized image.

[0050] The pretreatment step in described step (1) specifically comprises:

[0051] 1) Use the color gamut conversion of the weighted average method to change the image from a color image to a grayscale image;

[0052] 2) denoising the resulting grayscale image through Wiener filtering;

[0053] 3) Select the Otsu method (big law) as the method of threshold value processing, and further convert the grayscale image into a binary image.

[0054] The black and white binary image obtained after image preprocessing is as follows: figure 2 shown.

[0055] (2) edge detection is carried out to the circumscribed rectangle in the binarized image, and the positions of multiple rectangles are obtained;

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Abstract

The invention discloses a multi-bar code positioning method, which comprises the following steps: (1) preprocessing the detected image to obtain a binary image; (2) edge detection is performed on theexternal rectangles in the binary image to obtain positions of a plurality of rectangles; (3) judging by the bar code, selecting the rectangle which meets the conditions; (4) determining the angle ofthe smallest circumscribed rectangle and correcting the angle to realize the upright of the bar code; (5) sorting the upright rectangles of the bar codes, obtaining a plurality of sorted rectangular regions containing the bar codes under the condition that the bar code system is consistent, and completing the positioning of the bar codes. The invention can obtain the positioning of a plurality ofbar codes in one measurement, can greatly speed up the whole logistics speed, and thus achieves the purpose of improving the efficiency.

Description

technical field [0001] The invention relates to the field of image processing such as positioning, cutting and angle rotation of a plurality of barcodes in an image, and in particular relates to a multi-barcode positioning method. Background technique [0002] Today, with the rapid development of the logistics industry, the design of express orders has been improved to varying degrees according to various needs. However, due to the lack of national standards, the styles of express orders of each logistics company are different, and the specifications are very different. Among them Including the difference in barcode position, aspect ratio and barcode length. [0003] Image processing technology has been applied since the 1950s, and has penetrated into every aspect of daily life. The content of image technology is very rich, including image acquisition, image coding and compression, image storage and transmission, image transformation, image synthesis, image enhancement, ima...

Claims

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Application Information

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IPC IPC(8): G06K7/14
CPCG06K7/1443G06K7/1452
Inventor 谢巍刘希张浪文
Owner SOUTH CHINA UNIV OF TECH
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