Conversion of Braille to Text in English, Hindi and Tamil Languages

摘要

The Braille system has been used by the visually impaired for reading andwriting. Due to limited availability of the Braille text books an efficientusage of the books becomes a necessity. This paper proposes a method to converta scanned Braille document to text which can be read out to many through thecomputer. The Braille documents are pre processed to enhance the dots andreduce the noise. The Braille cells are segmented and the dots from each cellis extracted and converted in to a number sequence. These are mapped to theappropriate alphabets of the language. The converted text is spoken out througha speech synthesizer. The paper also provides a mechanism to type the Braillecharacters through the number pad of the keyboard. The typed Braille characteris mapped to the alphabet and spoken out. The Braille cell has a standardrepresentation but the mapping differs for each language. In this paper mappingof English, Hindi and Tamil are considered.