Braille Converter For Exam

Background What is Braille? Braille is a series of raised dots that can be read with the fingers by people who are blind or whose eyesight is not sufficient for reading printed material. Teachers, parents, and others who are not visually impaired ordinarily read Braille with their eyes. Braille is not a language. Rather, it is a code by which languages such as English or Sinhala may be written and read.

Background cont...  In this system targets General exams in Sri Lanka like Ordinary Level(O\L) or Advance Level(A\L)  Basically exam paper creator only creates English version of the exam paper  If he needs to create Braille version of that paper he need external person who expert in Braille language  That conversion process is time consuming and unsecure  Using this system exam paper creator can convert standard exam paper to Braille paper by not getting any help of external person

Background cont... And also who answer the Braille version exam paper write Braille version answer That Braille answer cant read examiner because he haven't any knowledge about Braille language Then he must convert it into standard text(English) with the help of external Braille experts That is time consuming approach Using this system can be converted Braille version answer sheet into standard text document in English All above operations based on image processing technique call Optical Character Recognition (OCR) and template matching

Research Objectives Common Objectives – To provide a perfect solution for how to convert Braille words into computer readable format and Standard English words into Braille words – To implement Offline Character Recognition System for Braille character recognition – To reduce the wasting time of typing Braille version of the exam paper or any other document – To provide the facility of editing the converted document after the conversion by providing an editor – To recognize words in the scanned document by achieving accuracy level between 80% - 90%

Applicable techniques Binarization Image enhancing techniques Filtering the characters Character segmentation Word segmentation

Overall System Diagram Exam paper creator Create exam paper e-Exam paper Print exam paper Scan text paper or Braille paper Exam paper’s Scanned Image Braille Answer Sheets Scanned Image Converter Generated Braille exam paper Generated text Answer sheet Text to braille converterBraille to Text converter Printed exam paper (hard copy) Braille Answer Sheet Blind candidate

System Architecture Scanned Braille Answer Sheet Filtering Scanned Exam Paper Enhance Image Character Segmentation English Character Database Braille Character Database Create Braille Exam Paper Create English Answer Sheet Post Configuration English Answer Sheet Braille Exam paper Features Extraction

Tools and Technologies Image Enhancement Adaptive Binarization Filtering Character Segmentation Histogram profile Character Recognition Template Matching Post Processing Noisy channel Model Character based segmentation model Bigram Language model

Tools and Technologies cont... OpenCV : using Aforge.NET wrapper to visual c# (Open Source Computer Vision Library) Microsoft Visual Studio 2010 : Visual C# (Integrated development environment) MS office package 2007 : (OCR)

Benefits of using Braille Converter Easy to examine answer sheets –Because Braille answer sheet also converts into normal English paper, its easy to correct answer papers Easy to make papers –Both normal vision and blind vision papers can create by participation of limited people

Expected Results When converting a Braille document into word document, it should be accurate at least 80%-90% When converting a word document into braille document, it should be accurate at least 80%-90% Less time consuming and minimize operational cost

System Interfaces

System Interface

Work Brake Down Structure TaskAllocated Member 1 Detection of Braille characters in the above edited image. A character of English alphabet is mapped corresponding to each code. And convert it into a printable English answer sheet version. IT Ranasinghe A.D.E.S 2 Analysis the characters in the Braille answer sheet. And make the dots (Braille characters) in the image. IT Chamalika Hewawitharana G.H.P 3 Extraction of characters in the examination paper and it converts to an Image. And make the characters in the image useful to reorganize format. IT Ranaweera R.K.I.M 4 Detection of English characters in the above edited image. And convert it into a printable Braille paper version. IT Gunawardhana R.D

Group Members 1.IT Ranasinghe A.D.E.S 2.IT Ranaweera R.K.I.M 3.IT Chamalika Hewawitharana G.H.P 4.IT Gunawardhana R.D Group Title – Braille Converter For Exams Group Number