Patent ID: 7953280
Filing Date: 2011-05-31
Classification: G06K

Abstract:
1. A method for identifying pixels in co-registered first and second images that correspond to anomalous changes within the images, comprising: selecting said first and second images for comparison; writing sample (x,y) pairs to represent a pixel at a specified location in the first and second image; wherein x represents the pixel from the first image, and y represents the corresponding pixel from the second image; estimating P(x); wherein P(x) comprises the distribution of pixels in the first image; estimating P(y); wherein P(y) comprises the distribution of pixels in the second image; estimating P(x,y); wherein P(x,y) comprises the distribution of (x,y) values in the first and second images; and computing for every (x,y) pair the ratio of f(x,y)=P(x,y)/[P(x)P(y)].