NDLI: Epipolar Contrained User Pushbutton Selection in Projected Interfaces

Content Provider	IEEE Xplore Digital Library
Author	Kale, A. Kwan, K. Jaynes, C.
Copyright Year	2004
Description	Author affiliation: UK Center for Visualization and Virtual Reality, Lexington KY (Kale, A.)
Abstract	An almost ubiquitous user interaction in most HCI applications is the task of selecting one of out of a given list of options. For example, in common desktop environments, the user moves the mouse pointer to the desired option and clicks it. The analog of this action in projector-camera HCI environments involves the user raising her finger to touch one of the different virtual buttons projected on a display surface. In this paper, we discuss some of the challenges involved in tracking and recognizing this task in an projected immersive environment and present a hierarchical vision based approach to detect intuitive gesture-based "mouse clicks" in a front-projected virtual interface. Given the difficulty of tracking user gestures directly in a projected environment, our approach first tracks shadows cast on the display by the user and exploits the multi-view geometry of the camera-projector pair to constrain a subsequent search for the users hand position in the scene. The method only requires a simple setup step in which the projector's epipole in the cameras frame is estimated. We demonstrate how this approach is capable of detecting a contact event as a user interacts with a virtual pushbutton display. Results demonstrate that camera-based monitoring of user gesture is feasible even under difficult conditions in which the user is illluminated by changing and saturated colors.
Starting Page	156
Ending Page	156
File Size	530946
Page Count	1
File Format	PDF
DOI	10.1109/CVPR.2004.332
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-06-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Human computer interaction Geometry Computer vision Visualization Computer displays Event detection Fingers Virtual reality Mice Application software
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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