Enhancing low quality videos of illuminated scenes

Details Enhancing low quality videos of illuminated scenes Enhancing low quality videos of illuminated scenes

2008-04-15

2008-04-15

Chen, Wenpeng (Department: 2624)

Image analysis

Image enhancement or restoration

Reexamination Certificate

active

07359562

ABSTRACT:
A method enhances a low quality video. An input video Vjinis acquired of a scene under uncontrolled illumination. The input video Vjinis smoothed to produce a noise-reduced video Sj. Temporal gradients Gtj(x, y) are determined for each frame j of the noise reduced video Sj. The gradients Gtj(x, y) are thresholded to generate a binary mask Mj(x, y). For each frame, weights are determined according Wj(x, y)=F(Mk(x, y), and a spatial gradient field is determined according to Gxyj(x, y). Then, an output video Vjoutis constructed from the spatial gradient field Gxyj.

REFERENCES:
patent: 4494140 (1985-01-01), Michael
patent: 5361105 (1994-11-01), Iu
patent: 5557330 (1996-09-01), Astle
patent: 5600731 (1997-02-01), Sezan et al.
patent: 5799111 (1998-08-01), Guissin
patent: 6061100 (2000-05-01), Ward et al.
patent: 6091389 (2000-07-01), Maeda et al.
patent: 6335990 (2002-01-01), Chen et al.
patent: 6480615 (2002-11-01), Sun et al.
patent: 7012649 (2006-03-01), Michel
patent: 7023487 (2006-04-01), Adams
patent: 7050501 (2006-05-01), Alvarez
patent: 7145607 (2006-12-01), Hui
patent: 2003/0095080 (2003-05-01), Colmenarez et al.
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. InProceedings 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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