Patent ID: 6633684
Filing Date: 2003-10-14
Classification: G06T

Abstract:
A method for maximizing contrast between neighboring points of a data population selected from a digital image, each image point being defined by a position and an intensity, the image having an intensity dynamic range, the method comprising the steps of:(a) determining a first low frequency trending function which is curve fit to the data population's maximum intensities; (b) determining a second low frequency trending function, independent from the first trending function, and which is curve fit to the data population's minimum intensities; (c) establishing a maximum and minimum fairway for the data population bounded by the first and second trending functions; and for each point in the data population, (d) extracting a range of the local minimum and maximum intensity from the fairway; (e) determining a local scaling factor as the ratio between the dynamic range for the image and the extracted local range; and f) scaling the point by the local scaling factor.