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Method and system for detecting Braille dot

A point detection and Braille technology, applied in the direction of instruments, character and pattern recognition, computer parts, etc., can solve the problem of slow speed, paper version Braille point detection technology is not robust enough, unable to adapt to a variety of Braille printing forms and acquisition forms, etc. question

Active Publication Date: 2018-04-24
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the above paper-based Braille dot detection technology is not robust enough, the speed is slow, and cannot adapt to various Braille printing forms and collection forms, the present invention proposes a Braille dot detection method and system

Method used

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  • Method and system for detecting Braille dot
  • Method and system for detecting Braille dot

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Embodiment Construction

[0040] For realizing above-mentioned technical effect, the present invention is made up of the following steps:

[0041] Step 1, Braille image acquisition;

[0042] Step 2. Interactive labeling of Braille dots;

[0043] Step 3, rapid detection of Braille dots;

[0044] In order to make the above-mentioned characteristics and effects of the present invention more clear and understandable, the following specific embodiments are used to describe the above-mentioned steps, and the detailed description is as follows in conjunction with the accompanying drawings.

[0045] Such as Figure 10 As shown, the present invention includes, step 1, Braille image acquisition:

[0046] Acquire digitized images of paper-based Braille using a capture device. The collection method may include scanning by a scanner, photographing by a camera, or a special Braille image collection device, etc. The paper version of Braille includes Braille dots in the form of raised dots and / or recessed dots. T...

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Abstract

The invention relates to a method and a system for detecting a Braille dot. The method comprises the steps of acquiring a digitized image of paper Braille by use of a collecting device; performing Braille dot labeling on Braille of the digitized image; intercepting a Braille dot image region as a positive sample with the Braille dot as a center according to the labeled Braille image, and intercepting a background image region except the Braille dot image region as a negative sample; extracting a plurality of characteristics of the positive sample and the negative sample, and training a cascadeclassifier; and performing detection and location on the Braille dot on the to-be-detected Braille image by use of the cascade classifier. Therefore, automatic labeling for the Braille dot of the Braille digitalized image can be realized.

Description

technical field [0001] The invention relates to the field of braille marking, in particular to a method and system for detecting braille dots. Background technique [0002] Due to visual impairment, the visually impaired cannot obtain information in plain text like a sighted person. They mainly obtain information by touching Braille symbols to read Braille. At present, the number of Braille books in circulation is still small, which cannot meet the reading needs of blind friends. On the other hand, the Braille library has stored many valuable early books and documents in Braille. Due to the lack of digital information in Braille, these books are expensive to republish. Moreover, in the field of special education, the preparation and marking of test papers for blind students is still done by manual translation by Braille teachers, which is time-consuming and laborious, and lacks objectivity. Therefore, Braille automatic detection and recognition technology for paper Braille...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62
CPCG06F18/22G06F18/2148G06F18/24
Inventor 刘宏钱跃良王向东
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI