Patent ID: 6351571
Filing Date: 2002-02-26
Classification: A61B,G06T

Abstract:
A method of analyzing the low- and high-frequency components of a digital image comprising the steps of:providing a rectangular digital image with pixel coordinates ranging from (0,0) to (xmax,ymax); specifying the size of a rectangular kernel, Kx by Ky; processing the image as follows: for each image pixel (x,y) within the image, sum all image pixels included in the rectangular region (max(xâˆ’Kx/2,0), max(yâˆ’Ky/2,0)) to (min(x+Kx/2,xmax), min(y+Ky/2,ymax)) and divide said sum by the total number of pixels included in said sum, the result is the low frequency component pixel (x,y) in the low-frequency image; subtracting said low-frequency component from said provided digital image to obtain the high frequency component of said provided digital image.