Patent ID: 6829383
Filing Date: 2004-12-07
Classification: A61B,G06T

Abstract:
A method for correcting errors resulting from differently illuminated eye fundus images, the method comprising the steps of:obtaining at least two fundus images; selecting a first group of pixels from a first image; selecting a second group of pixels from a second image, the second group of pixels associated with the first group of pixels; determining an intensity level for at least one color channel for each pixel in each group of pixels in each image; determining a mean intensity level and a variance for each group of pixels in each image; and altering the intensity level of pixels of the first group to approximate the intensity level of pixels in the second group by determining a new intensity level for both a first pixel of the first group and a corresponding second pixel of the second group, each intensity level being between the intensity level of the first pixel and the intensity level of the second pixel and altering the intensity level of the first and second pixels to be the new intensity level.