Patent ID: 6097837
Filing Date: 2000-08-01
Classification: G06T

Abstract:
A method of removing temporal light variations from a sequence of images comprising:selecting a reference image and designating a portion of the reference image as a reference image region;designating a first portion of at least one base image of the sequence of images as a first selected image region and a second portion as a second selected image region;generating a color mapping by comparing the first selected image region of the base image with the reference image region of the reference image frame; andapplying the color mapping to the second selected image region of the base image to generated a corrected image;wherein generation of the color mapping includes:generating a first histogram for at least one color band for the pixels in the reference image region of the reference image and a second histogram for at least one color band for the pixels in the first selected image region of the base image; andgenerating a lookup table based on the first and second histograms that maps original values of the pixels in the base image to corrected values in the corrected image.