Detecting silhouette edges in images

Image analysis – Pattern recognition – Feature extraction

Reexamination Certificate

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Details

C382S190000, C382S284000, C345S426000

Reexamination Certificate

active

10391999

ABSTRACT:
A method detects silhouette edges in images. An ambient image is acquired of a scene with ambient light. A set of illuminated images is also acquired of the scene. Each illuminated image is acquired with a different light source illuminating the scene. The ambient image is combined with the set of illuminated to detect cast shadows, and silhouette edge pixels are located from the cast shadows.

REFERENCES:
patent: 6490048 (2002-12-01), Rudd et al.
patent: 6859565 (2005-02-01), Baron
patent: 6903359 (2005-06-01), Miller et al.
patent: 2003/0231175 (2003-12-01), Pfister et al.
patent: WO 9207234 (1992-04-01), None
Elder, J. 1999. Are Edges Incomplete?International Journal of Computer Vision 34, 2/3, 97-122.
Fattal, R., Lischinski, D., and Werman, M. 2002. Gradient Domain High Dynamic Range Compression. InProceedings of SIGGRAPH 2002, ACM SIGGRAPH.
Hertzmann, A. 1988. Painterly Rendering with Curved Brush Strokes of Multiple Sizes. InProceeding of SIGGRAPH '98(Orlando, Jul. 1998), M. Cohen, Ed., Computer Graphics Proceedings, Annual Conference Series, ACM SIGGRAPH, 453-460.
Hertzmann, A. 1999. Introduction to 3D Non-Photorealistic Rendering: Sihouettes and Outlines. InSIGGRAPH '99 Course Notes. Course on Non-Photorealistic Rendering, S. Green. Ed. New York, ch.7.
Kowalski, M.A., Markosian, L., Northrup, J. D., Bourdev, L., Barzel, R., Holden, L. S., and hughes, J. F. 1999. Art-Based Rendering of Fur, Grass, and Trees. InProceeding of SIGGRAPH '99(Los Angeles, Aug. 1999), Computer Graphics Proceedings, Annual Conference Series, ACM SIGGRAPH, 433-438.
Markosian, L., Kowalski, M. A., Trychin, S. J., Bourdev, L. D., Goldstein, D., and Hughes, J.F. 1997. Real-Time Nonphotorealistic Rendering. InProceeding of SIGGRAPH '97(Los Angeles, Aug. 1997), T. Whitted, Ed., Computer Graphics Proceedings, Annual Conference Series, ACM SIGGRAPH, 415-420.
Ostromoukhov, V. 1999. Digital facial engraving. InProceeding of SIGGRAPH '99, A. Rockwood, Ed., ACM SIGGRAPH, 417-424.
Reinhard, E., Stark M., Shirley, P., and Ferwerda, J. 2002. Photographic Tone Reproduction for Images. InProceedings of SIGGRAPH 2002, ACM SIGGRAPH.
Savarese, S., Rushmeier, H., Bernardini, F., and Perona, P. 2001. Shadow Carving. InProc. of the Int. Conf. on Computer Vision.
Toyama, K., Krumm, J., Brumitt, B., and Meyers, B. 1999. Wallflower: Principles and Practice of Background Maintenance. InICCV(1), 255-261.
Zickler, T., Belhumeur, P. N., and J., K. D. 2002. Helmhotz Stereopsis: Exploiting Reciprocity for Surface Reconstruction. InECCV.

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