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Shadow tracking on multi-touch tables

Authors:

Florian Echtler,

Manuel Huber,

Gudrun KlinkerAuthors Info & Claims

AVI '08: Proceedings of the working conference on Advanced visual interfaces

Pages 388 - 391

https://doi.org/10.1145/1385569.1385640

Published: 28 May 2008 Publication History

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Abstract

Multi-touch interfaces have been a focus of research in recent years, resulting in development of various innovative UI concepts. Support for existing WIMP interfaces, however, should not be overlooked. Although several approaches exist, there is still room for improvement, particularly regarding implementation of the "hover" state, commonly used in mouse-based interfaces.

In this paper, we present a multi-touch system which is designed to address this problem. A multi-touch table based on FTIR (frustrated total internal reflection) is extended with a ceiling-mounted light source to create shadows of hands and arms. By tracking these shadows with the rear-mounted camera which is already present in the FTIR setup, users can control multiple cursors without touching the table and trigger a "click" event by tapping the surface with any finger of the corresponding hand.

An informal evaluation with 15 subjects found an improvement in accuracy when compared to an unaugmented touch screen.

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Fan NXiao R(2022)Reducing the Latency of Touch Tracking on Ad-hoc SurfacesProceedings of the ACM on Human-Computer Interaction10.1145/35677306:ISS(489-499)Online publication date: 14-Nov-2022
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Index Terms

Shadow tracking on multi-touch tables
1. Human-centered computing
  1. Human computer interaction (HCI)
    1. Interaction devices
      1. Touch screens

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Published In

AVI '08: Proceedings of the working conference on Advanced visual interfaces

May 2008

483 pages

ISBN:9781605581415

DOI:10.1145/1385569

General Chair:
Stefano Levialdi
Sapienza, Università di Roma, Roma, Italy

Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Association for Computing Machinery

New York, NY, United States

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Published: 28 May 2008

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AVI '08: The International Conference on Advanced Visual Interfaces

May 28 - 30, 2008

Napoli, Italy

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https://dl.acm.org/doi/10.1145/3567737
Fan NXiao R(2022)Reducing the Latency of Touch Tracking on Ad-hoc SurfacesProceedings of the ACM on Human-Computer Interaction10.1145/35677306:ISS(489-499)Online publication date: 14-Nov-2022
https://dl.acm.org/doi/10.1145/3567730
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Fluid DTMouse: better mouse support for touch-based interactions

Direct and indirect multi-touch interaction on a wall display

Design and evaluation of interaction models for multi-touch mice

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Fluid DTMouse: better mouse support for touch-based interactions

Direct and indirect multi-touch interaction on a wall display

Design and evaluation of interaction models for multi-touch mice

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