Geometrically Correct Imagery for Teleconferencing

Ruigang Yang; Michael S. Brown; W. Brent Seales; Henry Fuchs

doi:10.1145/319463.319596

Geometrically Correct Imagery for Teleconferencing

Ruigang Yang, Michael S. Brown, W. Brent Seales, Henry Fuchs

Computer Science

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Current camera-monitor teleconferencing applications produce unrealistic imagery and break any sense of presence for the participants. Other capture/display technologies can be used to provide more compelling teleconferencing. However, complex geometries in capture/display systems make producing geometrically correct imagery difficult. It is usually impractical to detect, model and compensate for all effects introduced by the capture/display system. Most applications simply ignore these issues and rely on the user acceptance of the camera-monitor paradigm. This paper presents a new and simple technique for producing geometrically correct imagery for teleconferencing environments. The necessary image transformations are derived by finding a mapping between a capture and display device for a fixed viewer location. The capture/display relationship is computed directly in device coordinates and completely avoids the need for any intermediate, complex representations of screen geometry, capture and display distortions, and viewer location. We describe our approach and demonstrate it via several prototype implementations that operate in real-time and provide a substantially more compelling sense of presence than the standard teleconferencing paradigm.

Original language	English
Title of host publication	MULTIMEDIA 1999 - Proceedings of the 7th ACM International Conference on Multimedia (Part 1)
Pages	179-186
Number of pages	8
ISBN (Electronic)	9781581131512
DOIs	https://doi.org/10.1145/319463.319596
State	Published - 1999
Event	7th ACM International Conference on Multimedia (Part 1), MULTIMEDIA 1999 - Orlando, United States Duration: Oct 30 1999 → Nov 5 1999

Publication series

Name	MULTIMEDIA 1999 - Proceedings of the 7th ACM International Conference on Multimedia (Part 1)
Volume	1

Conference

Conference	7th ACM International Conference on Multimedia (Part 1), MULTIMEDIA 1999
Country/Territory	United States
City	Orlando
Period	10/30/99 → 11/5/99

Bibliographical note

Funding Information:
This work is supported by the National Science Foundation cooperative agreement AX-8920219: “Science and Technology Center for Computer Graphics and Scientific Visualization”, the “National Tele-lmmersion Initiative” sponsored by Advanced Networks and Services, Link Foundation, and Intel Corporation. We would like to thank Ramesh Raskar for’ proposing use of the UNC Camera-Cluster use in a very-wide-field-of-view teleconferencing environment. We also gratefully acknowledge John Thomas, Jim Mahaney and David Harrison in the design and assembly of our test environment. We give special thanks to Herman Towles for useful discussions of implementation, hardware layout, and overall motivation.

Publisher Copyright:
© 1999 ACM.

Keywords

Teleconference
graphics
immersive display
real-time
telepresence
video conference

ASJC Scopus subject areas

Computer Graphics and Computer-Aided Design
Human-Computer Interaction
Software

Access to Document

10.1145/319463.319596

Cite this

@inproceedings{ed91c0d4450b4c92877b9d8a1a720c81,

title = "Geometrically Correct Imagery for Teleconferencing",

abstract = "Current camera-monitor teleconferencing applications produce unrealistic imagery and break any sense of presence for the participants. Other capture/display technologies can be used to provide more compelling teleconferencing. However, complex geometries in capture/display systems make producing geometrically correct imagery difficult. It is usually impractical to detect, model and compensate for all effects introduced by the capture/display system. Most applications simply ignore these issues and rely on the user acceptance of the camera-monitor paradigm. This paper presents a new and simple technique for producing geometrically correct imagery for teleconferencing environments. The necessary image transformations are derived by finding a mapping between a capture and display device for a fixed viewer location. The capture/display relationship is computed directly in device coordinates and completely avoids the need for any intermediate, complex representations of screen geometry, capture and display distortions, and viewer location. We describe our approach and demonstrate it via several prototype implementations that operate in real-time and provide a substantially more compelling sense of presence than the standard teleconferencing paradigm.",

keywords = "Teleconference, graphics, immersive display, real-time, telepresence, video conference",

author = "Ruigang Yang and Brown, {Michael S.} and Seales, {W. Brent} and Henry Fuchs",

note = "Funding Information: This work is supported by the National Science Foundation cooperative agreement AX-8920219: “Science and Technology Center for Computer Graphics and Scientific Visualization”, the “National Tele-lmmersion Initiative” sponsored by Advanced Networks and Services, Link Foundation, and Intel Corporation. We would like to thank Ramesh Raskar for{\textquoteright} proposing use of the UNC Camera-Cluster use in a very-wide-field-of-view teleconferencing environment. We also gratefully acknowledge John Thomas, Jim Mahaney and David Harrison in the design and assembly of our test environment. We give special thanks to Herman Towles for useful discussions of implementation, hardware layout, and overall motivation. Publisher Copyright: {\textcopyright} 1999 ACM.; 7th ACM International Conference on Multimedia (Part 1), MULTIMEDIA 1999 ; Conference date: 30-10-1999 Through 05-11-1999",

year = "1999",

doi = "10.1145/319463.319596",

language = "English",

series = "MULTIMEDIA 1999 - Proceedings of the 7th ACM International Conference on Multimedia (Part 1)",

pages = "179--186",

booktitle = "MULTIMEDIA 1999 - Proceedings of the 7th ACM International Conference on Multimedia (Part 1)",

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Yang, R, Brown, MS, Seales, WB & Fuchs, H 1999, Geometrically Correct Imagery for Teleconferencing. in MULTIMEDIA 1999 - Proceedings of the 7th ACM International Conference on Multimedia (Part 1). MULTIMEDIA 1999 - Proceedings of the 7th ACM International Conference on Multimedia (Part 1), vol. 1, pp. 179-186, 7th ACM International Conference on Multimedia (Part 1), MULTIMEDIA 1999, Orlando, United States, 10/30/99. https://doi.org/10.1145/319463.319596

Geometrically Correct Imagery for Teleconferencing. / Yang, Ruigang; Brown, Michael S.; Seales, W. Brent et al.
MULTIMEDIA 1999 - Proceedings of the 7th ACM International Conference on Multimedia (Part 1). 1999. p. 179-186 (MULTIMEDIA 1999 - Proceedings of the 7th ACM International Conference on Multimedia (Part 1); Vol. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N1 - Funding Information: This work is supported by the National Science Foundation cooperative agreement AX-8920219: “Science and Technology Center for Computer Graphics and Scientific Visualization”, the “National Tele-lmmersion Initiative” sponsored by Advanced Networks and Services, Link Foundation, and Intel Corporation. We would like to thank Ramesh Raskar for’ proposing use of the UNC Camera-Cluster use in a very-wide-field-of-view teleconferencing environment. We also gratefully acknowledge John Thomas, Jim Mahaney and David Harrison in the design and assembly of our test environment. We give special thanks to Herman Towles for useful discussions of implementation, hardware layout, and overall motivation. Publisher Copyright: © 1999 ACM.

PY - 1999

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N2 - Current camera-monitor teleconferencing applications produce unrealistic imagery and break any sense of presence for the participants. Other capture/display technologies can be used to provide more compelling teleconferencing. However, complex geometries in capture/display systems make producing geometrically correct imagery difficult. It is usually impractical to detect, model and compensate for all effects introduced by the capture/display system. Most applications simply ignore these issues and rely on the user acceptance of the camera-monitor paradigm. This paper presents a new and simple technique for producing geometrically correct imagery for teleconferencing environments. The necessary image transformations are derived by finding a mapping between a capture and display device for a fixed viewer location. The capture/display relationship is computed directly in device coordinates and completely avoids the need for any intermediate, complex representations of screen geometry, capture and display distortions, and viewer location. We describe our approach and demonstrate it via several prototype implementations that operate in real-time and provide a substantially more compelling sense of presence than the standard teleconferencing paradigm.

AB - Current camera-monitor teleconferencing applications produce unrealistic imagery and break any sense of presence for the participants. Other capture/display technologies can be used to provide more compelling teleconferencing. However, complex geometries in capture/display systems make producing geometrically correct imagery difficult. It is usually impractical to detect, model and compensate for all effects introduced by the capture/display system. Most applications simply ignore these issues and rely on the user acceptance of the camera-monitor paradigm. This paper presents a new and simple technique for producing geometrically correct imagery for teleconferencing environments. The necessary image transformations are derived by finding a mapping between a capture and display device for a fixed viewer location. The capture/display relationship is computed directly in device coordinates and completely avoids the need for any intermediate, complex representations of screen geometry, capture and display distortions, and viewer location. We describe our approach and demonstrate it via several prototype implementations that operate in real-time and provide a substantially more compelling sense of presence than the standard teleconferencing paradigm.

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KW - immersive display

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KW - telepresence

KW - video conference

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Geometrically Correct Imagery for Teleconferencing

Abstract

Publication series

Conference

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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Cite this