Braille square adaptive positioning method and system

Abstract

The invention relates to a braille square adaptive positioning method and system, comprising: acquiring braille dot position information of a braille image; performing vertical coordinate clustering on the braille dot position information to obtain the positions of multiple pre-selected braille square horizontal lines; According to the vertical coordinates of the horizontal lines of each pre-selected braille square, judge from top to bottom whether there are horizontal lines that meet the standard. Expand upwards and downwards, and in the process of expansion, the newly expanded set of three horizontal lines is used as the benchmark, and at the same time, the horizontal lines in the wrong position are eliminated until reaching the upper and lower ends of the Braille image, and multiple sets of three horizontal lines are obtained. Lines are a group of braille square horizontal lines; similarly, the braille square vertical lines are obtained; the intersection points of the braille square vertical lines and the braille square vertical lines form the braille square grid.

Description

technical field [0001] The invention relates to the field of braille recognition, in particular to a braille square adaptive positioning method and system. 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 ...

AI Technical Summary

Problems solved by technology

There will be a certain dislocation phenomenon in the area of ​​convex points and concave points, but in the dense area of ​​double-sided Braille, the convex points and concave points are often interlaced, resulting in the appearance of Braille images showing diversity, and the appearance of concave and convex points Great changes will also occur, which brings great difficulties and challenges to the blind side positioning and Braille recognition of double-sided Braille

Braille square positioning is the basis of braille recognition, and there is still a lack of robust braille square positioning methods

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