Television – Monitoring – testing – or measuring – Testing of image reproducer
Reexamination Certificate
2006-10-10
2006-10-10
Hsia, Sherrie (Department: 2622)
Television
Monitoring, testing, or measuring
Testing of image reproducer
C348S745000
Reexamination Certificate
active
07119833
ABSTRACT:
A technique, and associated system and computer executable program code on a computer readable storage medium, for automatically correcting distortion of a front-projected display under observation by at least one camera. The technique may be employed in a myriad of front-projected display environments, e.g., single or multiple projectors and cameras are used. The technique includes: observing a first image, projected from at least one projector, comprising at least one target distribution of light intensities; for each conglomeration of white pixels of a difference image, compute a bounding box comprising a corresponding conglomeration of pixels in a framebuffer information of the camera, compute a bounding box comprising a corresponding conglomeration of pixels in a framebuffer information of the projector, compute an initial homography matrix, Htemp, mapping pixels of the projector's bounding box to those of the camera's bounding box, optimize the initial homography matrix, compute a central location, (Cx, Cy), of the camera's bounding box using the initial homography matrix; and using a plurality of correspondence values comprising the correspondence, compute a corrective transform to aid in the automatic correcting of the display.
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Rahul Sukthankar, Stockton, R.G., and Mullin, M.D., “Smarter Presentations: Exploiting Homography in Camera-Projector Systems,”ICCV(2001) {labeled “ATTACHMENT C” of applicants' provisional app. filed Dec. 3, 2002 as background technical information}.
Claudio Pinhanez, “Augmenting Reality with Projected Interactive Displays,”VAA(2001) 9 pages {labeled “ATTACHMENT D” of applicants' provisional app. filed Dec. 3, 2002 as background technical information}.
Rahul Sukthankar, Stockton, R.G., and Mullin, M.D., “Automatic Keystone Correction for Camera-assisted Presentation Interfaces,” {labeled “ATTACHMENT E” of applicants' provisional app. filed Dec. 3, 2002 as background technical information}.
R. Raskar and Beardsley, P., “A Self Correcting Projector,”In Proceedings of IEEE Computer Vision and Pattern Recognition(CVPR), 2001, Hawaii (Dec. 2001) pp. ??.
Ruigang Yang, Gotz, D., Hensley, J., Towles, H., and Brown M.S., “PixelFlex: A Reconfigurable Multi-Projector Display System,” date ??.
Han Chen, R. Sukthankar, G. Wallace, and Tat-Jen Cham, “Calibrating Scalable Multi-Projector Displays Using Camera Homography Trees.” Included here by way of background, only; noting that a corresponding citation of this group was made to [1] Technical Report TR-639-01, Princeton University, dated Sep. 2001; this document was available on-line for viewing on Dec. 4, 2001 and printed on that date.
R. Samantha, J. Zheng, T. Funkhouser, K. Li and J. Pal Singh, “Load Balancing for Multi-Projector Rendering Systems.” Included here by way of background, only; noting that this document was available on-line for viewing on Dec. 4, 2001 and printed on that date from: http://citeseer.nj.nec.com/update/201288 (listed on cover page).
R. Samantha, and T. Funkhouser, “Dynamic Algorithms for Sorting Primitives Among Screen-Space Tiles in a Parallel Rendering System.” Included here by way of background, only; noting that this document was available on-line for viewing on Dec. 4, 2001 and printed on that date from: http://citeseer.nj.nec.com/.
Jaynes Christopher O.
Steele Robert M.
Hsia Sherrie
Macheledt Bales & Heidmiller LLP
University of Kentucky Research Foundation
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