Shadow detection in images

Details Shadow detection in images Shadow detection in images

2005-11-17

2009-12-29

Werner, Brian P (Department: 2624)

Image analysis

Pattern recognition

Feature extraction

C382S103000, C382S199000, C348S169000

Reexamination Certificate

active

07639878

ABSTRACT:
In an embodiment, a novel, scene adaptive, robust shadow detection method has been disclosed. An adaptive division image analysis compares one or more images containing objects and shadows to a reference image that is void of the objects and shadows. Ratios are calculated comparing the frame with shadows and/or objects to the reference frame. Shadows are identified by identifying pixels that fall within a certain range of these ratios. In another embodiment, projection histograms are used to identify the penumbra region of shadows in the image.

REFERENCES:
patent: 5592567 (1997-01-01), Kilger
patent: 6349113 (2002-02-01), Mech et al.
patent: 2007/0104389 (2007-05-01), Wells
patent: WO-2007061779 (2007-05-01), None
Ibrahim, Mohd. M., et al., “Scene Adaptive Shadow Detection”,Enformatika Transactions on Engineering, 42, (Dec. 2004),88-91.
Bevilacqua, Alessandro , “Effective Shadow Detection in Traffic Monitoring Applications”,Journal of WSCG, 11(1), (Feb. 3-7, 2003,),1-8.
Cucchiara, R. , et al., “Improving shadow suppression in Moving Object Detection with HSV colour information”,2001 IEEE Intelligent Transportation Systems Conference Proceedings, (2001),334-339.
Horprasert, Thanarat , et al., “A Statistical Approach for Real-time Robust Background Subtraction and Shadow Detection”,7th IEEE ICCV Frame-Rate Workshop Conference Proceedings, (1999),1-19.
Javed, Omar , et al., “Tracking and Object Classification for Automated Surveillance”,Proceedings of the 7th European Conference on Computer Vision-Part IV, (2002),343-357.
Kaewtrakulpong, P. , et al., “An Improved Adaptive Background Mixture Model for Realtime Tracking with Shadow Detection”,Proc. 2nd European Workshop on Advanced Video Based Surveillance Systems, AVBS01., (Sep. 2001),1-5.
Rosin, Paul L., et al., “Image difference threshold strategies and shadow detection”,6th BMVC 1995 Conference Proceedings, Birmingham, UK,(1995),347-356.
Stander, J. , et al., “Detection of moving cast shadows for object segmentation”,IEEE Transactions on Multimedia, 1(1), (Mar. 1999),65-76.

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