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Authors: Takashi Homma 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 ; Motion, Tracking and Stereo Vision ; Video Surveillance and Event Detection

Abstract: We propose a large interactive display with virtual touch buttons and sliders on a pale-colored flat wall. Our easy-to-install system consists of a front projector and a single commodity camera. A button touch is detected based on the area of the shadow cast by the user’s hand; this shadow becomes very small when the button is touched. The shadow area is segmented by a brief change of the button to a different color when a large foreground (i.e., the hand and its shadow) covers the button region. Therefore, no time consuming operations, such as morphing or shape analysis, are required. Background subtraction is used to extract the foreground region. The reference image for the background is continuously adjusted to match the ambient light. Our virtual slider is based on this touch-button mechanism. When tested, our scheme proved robust to differences in illumination. The response time for touch detection was about 150 ms. Our virtual slider has a quick response and proved suitable as a controller for a Breakout-style game. (More)

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Paper citation in several formats:
Homma, T. and Nakajima, K. (2014). Virtual Touch Screen “VIRTOS” - Implementing Virtual Touch Buttons and Virtual Sliders using a Projector and Camera. In Proceedings of the 9th International Conference on Computer Vision Theory and Applications (VISIGRAPP 2014) - Volume 3: VISAPP; ISBN 978-989-758-009-3; ISSN 2184-4321, SciTePress, pages 34-43. DOI: 10.5220/0004728600340043

@conference{visapp14,
author={Takashi Homma. and Katsuto Nakajima.},
title={Virtual Touch Screen “VIRTOS” - Implementing Virtual Touch Buttons and Virtual Sliders using a Projector and Camera},
booktitle={Proceedings of the 9th International Conference on Computer Vision Theory and Applications (VISIGRAPP 2014) - Volume 3: VISAPP},
year={2014},
pages={34-43},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004728600340043},
isbn={978-989-758-009-3},
issn={2184-4321},
}

TY - CONF

JO - Proceedings of the 9th International Conference on Computer Vision Theory and Applications (VISIGRAPP 2014) - Volume 3: VISAPP
TI - Virtual Touch Screen “VIRTOS” - Implementing Virtual Touch Buttons and Virtual Sliders using a Projector and Camera
SN - 978-989-758-009-3
IS - 2184-4321
AU - Homma, T.
AU - Nakajima, K.
PY - 2014
SP - 34
EP - 43
DO - 10.5220/0004728600340043
PB - SciTePress