Patent ID: 6668078
Filing Date: 2003-12-23
Classification: G06K,G06T

Abstract:
A computer imaging system, having one or more memories and one or more central processing units (CPU), the system segmenting images of one or more objects from a background image, the system comprising:one or more image acquisition units that acquire the background image and a combined image of one or more of the objects in front of the background image, the background image and the combined image having two or more spectral bands and being stored in one or more of the memories; an intensity transform that isolates a light intensity component from each of the combined image and background image, so that a relative reflectance value for each of the spectral bands in both the combined image and background image remains; and a comparison process that performs a pixel by pixel comparison to determine a set of locations where the relative reflectance values differ between the combined image and background image, the set of locations representing a portion of the combined image corresponding to the objects without the background.