White balance for video applications

Details White balance for video applications White balance for video applications

2011-01-04

2011-01-04

Chan, Jason (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C396S225000

Reexamination Certificate

active

07864221

ABSTRACT:
In some embodiments, images for the video conference may be white balanced. White balancing may include dividing at least a subset of an image's pixels into multiple ranges according to their luminance and chrominance values. For example, at least a portion of the pixels in an image may be sorted into different groups (i.e., by incrementing counters respective to each group) according to the luminance and chrominance values of the pixels. If enough pixels are found to be in a particular group, a portion or all of the image may be adjusted by a ratio corresponding to that particular group. For example, blue and red analog gains (corresponding to the selected pixels) may be modified by a corresponding ratio to bring red and blue accumulations closer to green accumulations.

REFERENCES:
patent: 3542947 (1970-11-01), Thurston
patent: 4264928 (1981-04-01), Schober
patent: 5038216 (1991-08-01), Easterly et al.
patent: 5347599 (1994-09-01), Yamashita et al.
patent: 5528274 (1996-06-01), Hyodo
patent: 5528740 (1996-06-01), Hill et al.
patent: 5537157 (1996-07-01), Washino et al.
patent: 5579053 (1996-11-01), Pandel
patent: 5617539 (1997-04-01), Ludwig et al.
patent: 5629734 (1997-05-01), Hamilton et al.
patent: 5654759 (1997-08-01), Augenbraun et al.
patent: 5661525 (1997-08-01), Kovacevic et al.
patent: 5689641 (1997-11-01), Ludwig et al.
patent: 5692159 (1997-11-01), Shand
patent: 5719540 (1998-02-01), Takaoka et al.
patent: 5751338 (1998-05-01), Ludwig, Jr.
patent: 5757424 (1998-05-01), Frederick
patent: 5831666 (1998-11-01), Palmer et al.
patent: 5832143 (1998-11-01), Suga et al.
patent: 6043844 (2000-03-01), Bist et al.
patent: 6173069 (2001-01-01), Daly et al.
patent: 6301370 (2001-10-01), Steffens et al.
patent: 6377702 (2002-04-01), Cooper
patent: 6563537 (2003-05-01), Kawamura et al.
patent: 6594688 (2003-07-01), Ludwig et al.
patent: 6614474 (2003-09-01), Malkin et al.
patent: 6717578 (2004-04-01), Deering
patent: 6809358 (2004-10-01), Hsieh et al.
patent: 6816904 (2004-11-01), Ludwig et al.
patent: 6850565 (2005-02-01), Martins et al.
patent: 6965705 (2005-11-01), Ma et al.
patent: 7035481 (2006-04-01), Kim et al.
patent: 7038709 (2006-05-01), Verghese
patent: 7088392 (2006-08-01), Kakarala et al.
patent: 7130446 (2006-10-01), Rui et al.
patent: 7202904 (2007-04-01), Wei
patent: 2002/0131635 (2002-09-01), Cooper
patent: 2003/0052978 (2003-03-01), Kehtarnavaz et al.
patent: 2003/0174146 (2003-09-01), Kenoyer
patent: 2004/0183897 (2004-09-01), Kenoyer et al.
patent: 2004/0218837 (2004-11-01), Shiyama
patent: 2006/0082676 (2006-04-01), Jenkins et al.
patent: 2007/0139517 (2007-06-01), Jenkins
“A history of video conferencing (VC) technology” http://web.archive.org/web/20030622161425/http://myhome.hanafos.com/˜soonjp/vchx.html (web archive dated Jun. 22, 2003); 5 pages.
“MediaMax Operations Manual”; May 1992; 342 pages; VideoTelecom; Austin, TX.
“MultiMax Operations Manual”; Nov. 1992; 135 pages; VideoTelecom; Austin, TX.
Ross Cutler, Yong Rui, Anoop Gupta, JJ Cadiz, Ivan Tashev, Li-Wei He, Alex Colburn, Zhengyou Zhang, Zicheng Liu and Steve Silverberg; “Distributed Meetings: A Meeting Capture and Broadcasting System”; Multimedia '02; Dec. 2002; 10 pages; Microsoft Research; Redmond, WA.
P. H. Down; “Introduction to Videoconferencing”; http://www.video.ja.net/intro/; 2001; 26 pages.
Elan Amir, Steven McCanne, and Hui Zhang; “An Application Level Video Gateway”; In Proceedings of ACM Multimedia '95; 1995; 18 pages.
“Polycom Demonstrates High Definition (HD) Video on Industry Leading VSX Video Communications Platform”; Apr. 26, 2005; 2 pages.
Tim Hewson, Cliff McKnight, Anne Clarke, and Peter Marsh; “Video Communication”; Desktop Video AGOCG Report; Feb. 24, 1999; 48 pages.
Bill Birney and David Workman; “Determining the Shape of Pixels and Frames”; May 2003; 15 pages; Microsoft Corporation.
Paul Bourke; “YCC colour space and image compression”; Apr. 2000; 7 pages.
Fredo Durand and Julie Dorsey; “Fast Bilateral Filtering for the Display of High-Dynamic-Range Images”; International Conference on Computer Graphics and Interactive Techniques; 2002; pp. 257-266.
Armando Fox, Steven D. Gribble, Eric A. Brewer, and Elan Amir; “Adapting to Network and Client Variability via On-Demand Dynamic Distillation” Proceedings of the seventh international conference on Architectural support for programming languages and operating systems;1996; pp. 160-170.
Jefferson Han and Brian Smith; “CU-SeeMe VR Immersive Desktop Teleconferencing”; Proceeding of the Fourth ACM international conference on Multimedia; 1997; pp. 199-207.
Tohru Hoshi, Kenjiro Mori, Yasuhiro Takahashi Yoshiyuki Nakayama, and Takeshi Ishizaki; “B-ISDN Multimedia Communication and Collaboration Platform Using Advanced Video Workstations to Support Cooperative Work”; IEEE Journal on Selected Areas in Communications; Dec. 1992; pp. 1403-1412; vol. 10, No. 9.
A.B. Larsen and E.F. Brown; “‘Continuous Presence’ Video Conferencing at 1.5-6 Mb/sec”; Teleconferencing and Interactive Media, University of Wisconsin Extension Center for Interactive Programs; 1980; 8 pages.
D. Darian Muresan and Thomas M. Parks; “Optimal Recovery Demosaicing”; The IASTED Conference on Signal and Image Processing; 2002; 6 pages.
Roderick E. Perkins; “Spider: Investigation in Collaborative Technologies and Their Effects on Network Performance”; Global Telecommunications Conference; Dec. 1991; pp. 2074-2080; vol. 3.
Nicolas Roussel and Michel Beaudouin-Lafon; “VideoSpace: A Toolkit for Building Mediaspaces”; 1999; 11 pages.
Fred Sammartino and Dean Blackketter; “Desktop Multimedia Communications—Breaking the Chains”; 1991; 5 pages; Advanced Technology Group Apple Computer, Inc.
Scott R. Sharer; “What-Is ‘HD’/‘Hi-Def’”; Tandberg presentation; Aug. 2005; 43 pages.
Marc H. Willebeek-Lemair and Zon-Yin Shae; “Videoconferencing over Packet-Based Networks” IEEE Journal on Selected Ares in Communications; Aug. 1997; 1101-1114; vol. 15, No. 6.
“Polycom Executive Collection”; Jun. 2003; 4 pages; Polycom, Inc.; Pleasanton, CA.
U.S. Appl. No. 11/461,635, entitled “Dual Sensor Video Camera”, by Michael V. Jenkins, filed Aug. 2006.
Joe Duran and Charlie Sauer; “Mainstream Videoconferencing—A Developer's Guide to Distance Multimedia”; Jan. 1997; pp. 228-230; Addison Wesley Longman, Inc.

Affiliated with

Also associated with

Rating

White balance for video applications does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with White balance for video applications, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and White balance for video applications will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2741102