Patent ID: 6480619
Filing Date: 2002-11-12
Classification: G06T

Abstract:
A method of displaying on a display device a radiographic image represented by a digital signal representation comprising the steps of1) applying a transformation to the radiographic image to decompose it into a pyramidal multi-resolution representation comprising a sequence of detail images representing detail present in said radiographic image at one of a multiple resolution levels, and a residual image, 2)â€”storing said multiresolution representation into a memory 3)â€”retrieving said multi-resolution representation up to a predefined resolution level, 4)â€”modifying the retrieved multi-resolution representation at least one resolution level, 5)â€”generating an overview image by applying the inverse of said transform to said modified multi-resolution representation, 6)â€”displaying said overview image, 7)â€”defining an area of interest on said displayed overview image, 8)â€”retrieving the multi-resolution representation of the part of the image within said area of interest of said memory, 9)â€”modifying the retrieved multi-resolution representation of said area at at least one resolution level by applying to pixel values of the detail images within said area a non-linear monotonically increasing odd conversion function with a slope that gradually decreases, 10)â€”reconstructing said image area by applying the inverse of said transform to the modified multi-resolution representation of said area, 11)â€”displaying said reconstructed image area.