Bangla Talking Calculator for Visually Impaired Students in Bangladesh

  • Lutfun NaharEmail author
  • Azizah Jaafar
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9429)


An application named “BTbrailleCal” based on Android smart phone is designed to help visually impaired students (VIS) in calculating numbers. This paper describes a user interface with an easy-to-distinguish layout that enables VIS to interact with touch screen on the smart phone. Vibration feedback and audio feedback will be provided to the user regarding their input. Additionally, the paper illustrates the Braille method specially details about math Braille. Paper prototypes are created at the beginning and then the final design is done by using the designing software “Pencil”. This educational application will assist the visually impaired students to solve their mathematical problems.


Talking calculator Visually impaired Braille Prototyping Mathematics 


  1. 1.
    WHO Media Centre: Visual impairment and blindness.
  2. 2.
    Mitra, S., Posarac, A., Vick, B.. Disability and poverty in developing countries: a snapshsot from the world health survey. World Bank Sp discussion paper 1109 (2011)Google Scholar
  3. 3.
    Rahman, K.F.: Blindness, ‘Vision 2020’ and Bangladesh. Financ. Express 20(436), 10 (2012)Google Scholar
  4. 4.
    Das, A.: Inclusion of student with disabilities in mainstream primary education of Bangladesh. J. Int. Dev. Cooperation 17(2), 1–10 (2011)Google Scholar
  5. 5.
    Braille, L.: Procedure for Writing Words, Music and Plain-song Using Dots for the Use of the Blind and Made Available to Them. Institute National des Jeunes Aveugles (Royal Institution Of Blind Youth), Paris (1829)Google Scholar
  6. 6.
    Southern, C., Clawson, J., Frey, B., Abowd, G.D., Romero, M.: An evaluation of brailletouch: mobile touch screen text entry for the visually impaired. In: 14th International Conference on Human-Computer Interaction with Mobile Devices and Services Companion (MobileHCI 2012), San Francisco (2012)Google Scholar
  7. 7.
    Kway, E.H., Salleh, N.M., Majid, R.A.: Slate and stylus: an alternative tool for Braille writing. Procedia Soc. Behav. Sci. 7, 326–335 (2010)CrossRefGoogle Scholar
  8. 8.
    Tai, Z., Cheng, S., Verma, P., Zhai, Y.: Braille document recognition using belief propagation. J. Vis. Commun. Image Represent. 21(7), 722–730 (2010)CrossRefGoogle Scholar
  9. 9.
    Yeh, F.H., Tsay, H.S., Liang, S.H.: Human computer interface and optimized electro-mechanical design for Chinese Braille display. Mech. Mach. Theor. 43(12), 1495–1518 (2008)zbMATHCrossRefGoogle Scholar
  10. 10.
    Ren, K., Liu, S., Lin, M., Wang, Y., Zhang, Q.M.: A compact electroactive polymer actuator suitable for refreshable Braille display. Sens. Actuators A Phys. 143(2), 335–342 (2008)CrossRefGoogle Scholar
  11. 11.
    Yeh, F.H., Liang, S.H.: Mechanism design of the flapper actuator in Chinese Braille display. Sens. Actuators A Phys. 135(2), 680–689 (2007)MathSciNetCrossRefGoogle Scholar
  12. 12.
    Kwon, H.J., Lee, S.W., Lee, S.S.: Braille dot display module with a PDMS membrane driven by a thermopneumatic actuator. Sens. Actuators A Phys. 154(2), 238–246 (2009)MathSciNetCrossRefGoogle Scholar
  13. 13.
    Cheadle, B.: A parent’s guide to the slate and stylus. Future Reflections 13, 6–14 (1994)Google Scholar
  14. 14.
    Tang, J.: Using ontology and RFID to develop a new Chinese Braille learning platform for blind students. Expert Syst. Appl. 40, 2817–2827 (2013)CrossRefGoogle Scholar
  15. 15.
    Halder, S., Hasnat, A., Khatun, A., Bhattacharjee, D., Nasipuri, M.: Development of a bangla character recognition (BCR) system for generation of Bengali text from Braille notation. Int. J. Innov. Technol. Exploring Eng. 3(1), 5–10 (2013)Google Scholar
  16. 16.
    Yousuf, M.A., Shams, S.M.S.: Bangla Braille information system: an affordable system for the sightless population. Asian J. inf. Technol. 6(6), 696–699 (2007)Google Scholar
  17. 17.
    Hossain, G., Asaduzzaman, M., Ullah, A., Shams, S.M.S.: Bangla Braille embosser: a tool for Bengli speaking blinds. In: IEEE 5th International Conference on Advance Learning Technologies, Washington, DC, USA (2005)Google Scholar
  18. 18.
    Nahar, L., Jaafar, A., Ahamed, E., Kaish, A.B.M.A.: Design of a Braille learning application for visually impaired students in Bangladesh. Assistive Technol. (ID: 1011758) (2015). doi: 10.1080/10400435.2015.1011758
  19. 19.
    Harland, H., Roberts, C.: Unified English Braille for math.
  20. 20.
    Saffer, D.: Prototyping interactive gestures. In: Designing Gestural Interfaces, 1st edn., pp. 117–138. Mary Treseler, O’Reilly Media Inc., Canada (2008)Google Scholar
  21. 21.
    Hugo, N., Montague, K., Guerreiro, T., Guerreiro, J., Hanson, V.L.: B#: chord-based correction for multitouch braille input. In: Proceedings of the 32nd Annual ACM Conference on Human Factors in Computing Systems, pp. 1705–1708. ACM, New York (2014)Google Scholar
  22. 22.
    Guerreiro, T., Nicolau, H., Jorge, J., Gonçalves, D.: NavTap: a long term study with excluded blind users. In: Proceedings of SIG ASSETS. AMC Press (2009)Google Scholar

Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  1. 1.Institute of Visual InformaticsUniversiti Kebangsaan MalaysiaBangiMalaysia

Personalised recommendations