Patent ID: 7693331
Filing Date: 2010-04-06
Classification: G06K,G06T,G08B

Abstract:
1. A method for segmenting an object in images, method comprising the steps of: maintaining concurrently a visible background image from each current visible image in a sequence of visible images, and an infrared background image from each current infrared image in a sequence of infrared images; comparing concurrently each current visible image and the visible background image, and each current infrared image and the infrared background image to generate corresponding changed pixels; and discarding shadow pixels from the changed pixels to identify foreground pixels associated with a moving object in the scene, wherein the discarding further comprising: projecting the current image on the corresponding background image to determine projection scores; applying intensity constraints and hue constraints to the projection scores to determine possible shadow pixels; and evaluating the possible shadow pixels using IR difference score to determine the shadow pixels.