Braille Document Recognition in Southern Indian Languages– A Review

Braille document recognition involves image acquisition stage, image preprocessing, binarization, enhancement, feature extraction and recognition of the Braille script from the given image. The paper concentrates on various methods for the conversion from Southern IndianBraille script to corresponding language. The proposed methods were based on histogram technique, Piece wise enhancement techniques, Image filtering, horizontal profiling, vertical profiling, image Thresholding, de-skewing the image, template matching etc. This paper discusses research efforts proposed earlier for recognition the Southern IndianBraille script from a Braille document.