Patent ID: 6272234
Filing Date: 2001-08-07
Classification: H04N

Abstract:
A method of processing a digital image comprising the steps of:providing a digital medical image; andprocessing siad digital medical image for contrast as follows:for contrast <0 use a linear function to calculate the entire contrast look-up-table;for contrast 0, the contrast look-up-table is an identity table, andfor contrast greater than 0, linear function is used to calculate the linear region and for regions near D.sub.min and D.sub.max, the nonlinear function y=x.sup.n is used wherein for contrast <0, said linear function iscontrast (cv)=cv+[(slope-1) * (cv-pivot)cv]where ""cv"" is the code value having a value of 0 to 2.sup.n -1;""slope"" is the ratio between no change and the desired slope;""pivot"" is a fixed cv having value between 0 and 2.sup.n -1, and .sup.n is the depth of the digital image pixel in bits.