Title :
Image processing techniques to perform an autonomous system to translate relief braille into black-ink, called: Lectobraille
Author :
Dubus, J.P. ; Benjelloun, M. ; Devlaminck, V. ; Wauquier, F. ; Altmayer, P.
Author_Institution :
Lab. de Mesures Autom., Univ. des Sci. et Tech. de Lille-Flandres-Artois, Villeneuve d´´Ascq, France
Abstract :
The principles of relief acquisition with the use of a camera and a frame memory controlled by a microcomputer are presented. The use of spatial filtering techniques, especially polynomial filtering, followed by median filtering, erosion, and dilatation, permits the contrasted relief to be extracted from the bottom. After thresholding, an adaptive recognition method is applied, using projection of the braille characters to supply the braille-coded chain of the text.<>
Keywords :
computerised picture processing; handicapped aids; microcomputer applications; Lectobraille; adaptive recognition method; autonomous system; braille characters projection; braille to black ink translation; braille-coded chain; camera; dilatation; erosion; frame memory; image processing technique; median filtering; microcomputer control; polynomial filtering; spatial filtering techniques; thresholding;
Conference_Titel :
Engineering in Medicine and Biology Society, 1988. Proceedings of the Annual International Conference of the IEEE
Conference_Location :
New Orleans, LA, USA
Print_ISBN :
0-7803-0785-2
DOI :
10.1109/IEMBS.1988.94726
