Braille recognition system

Details Braille recognition system Braille recognition system

1996-06-13

1999-11-09

Johns, Andrew W.

Image analysis

Applications

Reading aids for the visually impaired

434112, 434113, 434114, 348 62, G06K 900

Patent

active

059829117

ABSTRACT:
In a braille recognition system according to the present invention, light is obliquely irradiated onto the surface of a document in braille, and its reflected light is received by imaging means, to obtain a gray image. An image corresponding to a pattern of projected points on the document in braille is obtained on the basis of the obtained gray image. An image is then cut in braille units from the image corresponding to the pattern of projected points. A braille code is generated for each cut image in the braille unit.

REFERENCES:
patent: 2866279 (1958-12-01), Surber
patent: 3640368 (1972-02-01), Weinberger
patent: 4972501 (1990-11-01), Horyu
patent: 5103485 (1992-04-01), Yamada
Oyama, Yoshifumi et al., "Development of Braille Reading System by Optical Sensing," Den-O-Ken Technical Report, vol. 4, No. 1, Mar. 1995, pp. 10-12 (English Translation).
Oyama, Yoshifumi et al., "Charater Recognition of Convex and Concave Hybrid Braille Points and Estimation of Deteriorated Braille Points," Journal of Electronics, Information & Communication Engineer Institute, D-II, vol. J79-D-II, No. 5, May 1996, pp. 727-736 (English Translation).

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