Patent ID: 6097849
Filing Date: 2000-08-01
Classification: G06T

Abstract:
A method of producing an enhanced image, comprising the steps of:providing image intensity at each pixel of an image;measuring contrast of said image by computing a central histogram moment I.sub.MOM wherein ##EQU3## where H(k) is an image histogram of said image and I.sub.MAX is a maximum value of the dynamic range of said image;scaling said image at each said pixel thereof based on said central histogram moment I.sub.MOM and said maximum value I.sub.MAX wherein a scaled image is defined at each said pixel;estimating a background of said image at each said pixel thereof;subtracting said background from said scaled image at each said pixel to produce a low contrast enhancement value associated with each said pixel of said image;adding said background to said scaled image at each said pixel to produce a high contrast enhancement value associated with each said pixel of said image; andsumming, for each said pixel of said image, a first portion of said low contrast enhancement value with a second portion of said high contrast enhancement value to generate an enhanced image intensity at each said pixel.