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Letter and Word Prediction for Virtual Braille Keyboard

Authors:
Krzysztof Dobosz
Łukasz Prajzler

Keywords: Text entry; Braille code; Letter prediction; Word prediction; Virtual keyboard.

Abstract:
The aim of this work was to study whether word prediction can be applied to virtual Braille keyboards and can improve typing text by visually impaired smartphone user. First the keyboards’ advantages and disadvantages were compared to choose one to extend with word prediction mechanism. Next the method was proposed and implemented in a form of a mobile application. Due to Braille code’s structure, it was possible to apply not only word, but also a letter and dot prediction. Finally, both number of dots and letters necessary for predicting letters and words respectively within the shortest time were studied. This work verified that prediction in on-screen Braille keyboards is possible and brings noticeable benefits in typing speed. The most important observation is that just after the first dot (or blank place) it is worth searching the suggested letters and words.

Pages: 465 to 470

Copyright: Copyright (c) IARIA, 2020

Publication date: March 22, 2020

Published in: conference

ISSN: 2308-4138

ISBN: 978-1-61208-761-0

Location: Valencia, Spain

Dates: from November 21, 2020 to November 25, 2020