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Method for recognizing punctiform characters on surfaces of cables

A character recognition, wire and cable technology, used in character and pattern recognition, insulated cables, cables, etc., can solve the problems of high work repetition, high cost, and high missed detection rate

Inactive Publication Date: 2015-08-05
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most domestic cable manufacturers use manual inspection, which is costly, inefficient, high missed detection rate, and highly repetitive.

Method used

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  • Method for recognizing punctiform characters on surfaces of cables
  • Method for recognizing punctiform characters on surfaces of cables
  • Method for recognizing punctiform characters on surfaces of cables

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Experimental program
Comparison scheme
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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Step 1: Read in the grayscale image of the cable containing dotted characters.

[0029] Step 2: Image binarization; use the Otsu algorithm to extract the binarization threshold of the grayscale image, and then use the binarization threshold to binarize the grayscale image.

[0030] Step 3: Image preprocessing; first perform median filtering on the binarized image to remove small noise points, and then use the morphological method to select a suitable morphological template to open the image so that the image belongs to the same character The origin of is close to the bond;

[0031] Step 4: Roughly extract the cable area; project the image obtained after preprocessing, select an appropriate threshold, calculate the cutting points at the upper and lower ends of the cable area, and cut the original image according to the position of the cutting point to reduce the...

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PUM

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Abstract

The invention discloses a method for recognizing punctiform characters on the surfaces of cables and belongs to the image processing field, in particular, belongs to the automated optical character recognition field. The method mainly comprises the steps of Otsu method threshold extraction and binarization, image preprocessing, cable regional coarse extraction, cable tilt correction, character segmentation, character tilt correction, template matching and identification logic design. The processing method of the punctiform characters on the surfaces of cables is put forward for the first time. With the method adopted, punctiform digits, English characters and few symbols on the surfaces of various kinds of cables can be accurately recognized. In a cable production process, character tilt appears in character jet printing inevitably, while, with the method of the invention adopted, accurate reorganization can be still performed when characters tilt slightly, and therefore, the method has a certain anti-interference ability.

Description

technical field [0001] The invention belongs to the field of image processing, in particular to the field of automatic optical character recognition. Background technique [0002] Characters on the surface of wires and cables are used to mark important product information such as cable production batch numbers, product numbers, production dates, and production lengths. Production costs have significant implications. Most of the characters on the surface of wire and cable are laser printing or inkjet printing, and the character forms are mainly divided into continuous characters and dot characters. Due to the discontinuity of the font, dot characters need to go through special processing steps before being recognized. At present, most cable manufacturers in China use manual inspection, which is costly, inefficient, has a high rate of missed inspections, and is highly repetitive. Contents of the invention [0003] The technical problem to be solved by the present inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/54G06V10/10
CPCH01B7/365G06V10/10
Inventor 张静王耀杰付大鹏谭沛岩任程辉易少宾刘霖刘娟秀叶玉堂刘永
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA