Toward Optimization of Gaze-Controlled Human–Computer Interaction: Application to Hindi Virtual Keyboard for Stroke Patients

Yogesh Kumar Meena, Hubert Cecotti, KongFatt Wong-Lin, Ashish Dutta, Girijesh Prasad

Research output: Contribution to journalArticle

12 Citations (Scopus)
106 Downloads (Pure)

Abstract

Virtual keyboard applications and alternative communication devices provide new means of communication to assist disabled people. To date, virtual keyboard optimization schemes based on script-specific information,along with multimodal input access facility, are limited.In this paper, we propose a novel method for optimizing the position of the displayed items for gaze-controlled tree based menu selection systems by considering a combination of letter frequency and command selection time.The optimized graphical user interface layout has been designed for a Hindi language virtual keyboard based on a menu wherein 10 commands provide access to type 88 different characters, along with additional text editing commands. The system can be controlled in two different modes: eye-tracking alone and eye-tracking with an access soft-switch. Five different keyboard layouts have been presented and evaluated with ten healthy participants. Furthermore, the two best performing keyboard layouts have been evaluated with eye-tracking alone on ten stroke patients.The overall performance analysis demonstrated significantly superior typing performance,high usability (87% SUS score), and low workload (NASA TLX with 17 scores) for the letter frequency and time-based organization with script specific arrangement design. This paper represents the first optimized gaze-controlled Hindi virtual keyboard, which can be extended to other languages.
Original languageEnglish
Pages (from-to)911-922
Number of pages12
JournalIEEE Transactions on Neural Systems and Rehabilitation Engineering
Volume26
Issue number4
Early online date12 Mar 2018
DOIs
Publication statusE-pub ahead of print - 12 Mar 2018

Keywords

  • Gaze tracking
  • human computer interaction
  • graphical user interfaces
  • optimization methods
  • performance evaluation.

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