System for softening images in screen space

Computer graphics processing and selective visual display system – Computer graphics processing – Three-dimension

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C345S419000

Reexamination Certificate

active

07423645

ABSTRACT:
A graphics rendering system and method is disclosed, in which color values for certain pixels appearing on the screen may be adjusted to create a blurring effect. A pixel-by-pixel comparison may be used to compare differences in depth, as noted in a depth buffer, and if pixel depths are sufficiently close, the pixel's color may be softened to take into account color values of neighboring pixels.

REFERENCES:
patent: 4737921 (1988-04-01), Goldwasser et al.
patent: 5289305 (1994-02-01), Lake, Jr.
patent: 5812139 (1998-09-01), Morimoto
patent: 6349113 (2002-02-01), Mech et al.
patent: 6548800 (2003-04-01), Chen et al.
patent: 6661918 (2003-12-01), Gordon et al.
patent: 7106326 (2006-09-01), Deering et al.
patent: 7202867 (2007-04-01), Rodriguez et al.
patent: 2003/0194110 (2003-10-01), Brodsky
patent: 2004/0239673 (2004-12-01), Schmidt
Brabec, S.; Seidel, H.-P.; “Hardware-accelerated rendering of antialiased shadows with shadow maps”, Proceedings Computer Graphics International 2001, Jul. 3-6, 2001, pp. 209-214.
Michael D. McCool, “Shadow vol. reconstruction from depth maps”, ACM Transactions on Graphics (TOG), v.19 n.1, p. 1-26, Jan. 2000.
Ulf Assarsson , Michael Dougherty , Michael Mounier , Tomas Akenine-Möller, “An optimized soft shadow vol. algorithm with real-time performance”, Proceedings of the ACM SIGGRAPH/EUROGRAPHICS Conference on Graphics hardware, Jul. 26-27, 2003, pp. 33-40, 131.
Paul Haeberli , Kurt Akeley, “The accumulation buffer: hardware support for high-quality rendering”, ACM SIGGRAPH Computer Graphics, v.24 n.4, p. 309-318, Aug. 1990.
M. Isard , M. Shand , A. Heirich, “Distributed rendering of interactive soft shadows”, Proceedings of the Fourth Eurographics Workshop on Parallel Graphics and Visualization, Sep. 9-10, 2002, Blaubeuren, Germany, pp. 71-76, 148.
Tobias Isenberg , Bert Freudenberg , Nick Halper , Stefan Schlechtweg , Thomas Strothotte, “A Developer's Guide to Silhouette Algorithms for Polygonal Models”, IEEE Computer Graphics and Applications, v.23 n.4, p. 28-37, Jul. 2003.
Jakobsen, B.; Christensen, N.J.; Larsen, B.D.; Petersen, K.S.; “Boundary correct real-time soft shadows”, Proceedings of Computer Graphics International, 2004, pp. 232-239.
Pinel, J.-M.; Nicolas, H.; “Shadows analysis and synthesis in natural video sequences”, Proceedings of 2002 International Conference on Image Processing, vol. 3, Jun. 24-28, 2002, pp. III-285-III-288.
Reeves, W. T., Salesin, D. H., and Cook, R. L., 1987, “Rendering antialiased shadows with depth maps”, Proceedings of the 14th Annual Conference on Computer Graphics and interactive Techniques, M. C. Stone, Ed., SIGGRAPH '87, ACM Press, NY, NY, pp. 283-291.
Mark Segal , Carl Korobkin , Rolf van Widenfelt , Jim Foran , Paul Haeberli, “Fast shadows and lighting effects using texture mapping”, ACM SIGGRAPH Computer Graphics, v.26 n.2, p. 249-252, Jul. 1992.
Pradeep Sen , Mike Cammarano , Pat Hanrahan, “Shadow silhouette maps”, ACM Transactions on Graphics (TOG), v.22 n.3, Jul. 2003, pp. 521-526.
Williams, L. 1978. Casting curved shadows on curved surfaces. In Proceedings of the 5th Annual Conference on Computer Graphics and interactive Techniques (Aug. 23-25, 1978). SIGGRAPH '78. ACM Press, New York, NY, 270-274.
Chris Wyman , Charles Hansen, “Penumbra maps: approximate soft shadows in real-time”, Proceedings of the 14th Eurographics workshop on Rendering, Jun. 25-27, 2003, Leuven, Belgium, 7 pages.
Zhengming Ying; Min Tang; Jinxiang Dong; “Soft shadow maps for area light by area approximation”, Proceedings 10th Pacific Conference on Computer Graphics and Applications, Oct. 9-11, 2002, pp. 442-443.
Spencer, G., Shirley, P., Zimmerman, K., and Greenberg, D. P. 1995. Physically-based glare effects for digital images. In Proceedings of the 22nd Annual Conference on Computer Graphics and interactive Techniques S. G. Mair and R. Cook, Eds. SIGGRAPH '95. ACM, New York, NY, 325-334.
Tumblin, J., Hodgins, J. K., and Guenter, B. K. 1999. Two methods for display of high contrast images. ACM Trans. Graph. 18, (Jan. 1, 1999), 56-94.
Hasenfratz, J.-M., Lapierre, M., Holzchuch, N., and Sillion, F.X., A Survey of Real-Time Soft Shadows Algorithms, Article, Eurographics 2003, 20 pp., STAR—State of the Art Report, © The Eurographics Association 2003, http://w3imagis.imag.fr/Publications/2003/HLHS03/index.fr.html.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

System for softening images in screen space does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System for softening images in screen space, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for softening images in screen space will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3974924

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.