NDLI: Camera-based Scrolling Interface for Hand-held Devices

Content Provider	IEEE Xplore Digital Library
Author	Davanzo, G. Medvet, E. Bartoli, A.
Copyright Year	2008
Description	Author affiliation: DEEI, Univ. of Trieste, Trieste (Davanzo, G.; Medvet, E.; Bartoli, A.)
Abstract	Hand-held devices have become widespread and provided with significant computing capabilities, which results in an increasing pressure for using these devices to perform tasks formerly limited to notebooks, like web browsing. Due to their small screens, however, hand-held devices cannot visualize directly documents that were not designed explicitly for small-screen rendering. Such documents may be rendered either at a scale too small to be useful, or at a scale that requires intensive scrolling operations by the user. Unfortunately, scrolling a small window across a large document with a hand-held device is quite cumbersome. In this paper we propose a scrolling system much simpler and more natural to use, based on the embedded camera-a component available in every modern hand-held device. We detect device motion by analyzing the video stream generated by the camera and then we transform the motion in a scrolling of the content rendered on the screen. This way, the user experiences the device screen like a small movable window on a larger virtual view, without requiring any dedicated motion-detection hardware. We performed an experimental evaluation aimed at assessing the effectiveness of the proposed system in the considered scenario, characterized by low image quality, unpredictable framed scene and soon. We performed an objective benchmark quantifying the accuracy of the detected trajectory and a subjective benchmark examining users' confidence with the proposed system. For the latter evaluation, we involved a panel of 20 subjects that executed a trajectory with our system and, as a comparison, with keyboard, mouse and touchpad. The results demonstrate that our approach is indeed practical.
Starting Page	527
Ending Page	532
File Size	187716
Page Count	6
File Format	PDF
ISBN	9780769532684
ISSN	15506037
DOI	10.1109/IV.2008.92
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-07-09
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Motion Detection Hand-held Devices Camera Phones Scrolling Computer-Human Interaction
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
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in