Authors:
Akira Nozaki
and
Katsuto Nakajima
Affiliation:
Tokyo Denki University, Japan
Keyword(s):
Projector-camera Systems, Projector-based Display, Touch Detection, Virtual Touch Screen.
Related
Ontology
Subjects/Areas/Topics:
Applications and Services
;
Computer Vision, Visualization and Computer Graphics
;
Enterprise Information Systems
;
Human and Computer Interaction
;
Human-Computer Interaction
Abstract:
We propose a virtual remote control interface called the “Everywhere Switch” as an alternative to multiple
remote controllers for many computerized home appliances. The interface consists of a group of virtual
touch buttons projected near the user from a projector affixed to a pan-tilt mount just below the living-room
ceiling. Methods to implement our system, including methods to search for a place to project the virtual
touch buttons, to extract finger and shadow regions on the virtual button area and determine their ratio, and
to detect touch operations, are described. We evaluated the precisions of the foreground extraction (finger or
its shadow) and the segmentation of the finger and its shadow under three different brightness conditions
(dim, semi-bright, and bright). The foreground extraction showed an F value of more than 0.97, and the
finger/shadow segmentation showed an F value of about 0.8 in all tested brightness conditions.