Method for modeling cast shadows in videos

Details Method for modeling cast shadows in videos Method for modeling cast shadows in videos

2005-06-27

2009-08-11

Mehta, Bhavesh M (Department: 2624)

Image analysis

Image segmentation

C382S103000, C382S291000, C382S254000

Reexamination Certificate

active

07574043

ABSTRACT:
A method models a scene. A video is acquired of the scene, and for each frame of the video, the method updates a set of background models for each pixel; a set of shadow models for each pixel; a set of shadow flow vectors for each color; and a background shadow map. Each pixel in each background model and each shadow model is represented by multiple layers. Each layer includes Gaussian distributions and each Gaussian distribution includes a mean and a covariance. The covariance is an inverse Wishart distribution and the updating is according to a recursive Bayesian estimation process.

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