Floor interaction with wearable projection interface using hand and toe

Abstract

We conducted a user study to unveil the usability of a wearable input/ output interface using hands and toes for operating applications such as telephone calls and e-mails. Specifically, subjects performed tasks in the states “hands-free,” “having baggage in their dominant hands,” and “having baggage in both hands” using the proposed system and a smartphone. Then, we evaluated the usability according to a questionnaire, an interview, and the task completion time. The results indicate that hand and toe input in the proposed system were accepted when performing simple button operations such as answering the phone. In addition, hand input in the proposed system was accepted when performing scroll operations such as reading an e-mail. However, when performing accurate button operations such as text entry tasks, hand and toe input in the proposed system were seldom accepted.