Patent ID: 7139416

Claim:
A method of enhancing a contrast of an image represented by a digital signal representation by decomposing said digital signal representation into a multi-scale representation comprising at least two detail images representing detail at multiple scales, modifying pixel values of said detail images to yield pixel values of a set of modified detail images by applying at least one conversion function to the detail images and computing a processed image representation by applying a reconstruction algorithm to the modified detail images wherein a segmentation map is constructed wherein with each pixel of said image a label is associated indicating a tissue type which said pixel represents, a tissue coefficient table is constructed relating a tissue coefficient with a scale of a layer and a tissue type of said pixel, for each said pixel of the layer of multi-scale representation a tissue coefficient corresponding with the scale of said layer and with the tissue type of said pixel is retrieved, and layers of said multi-scale representation are pixel-wise multiplied by a retrieved corresponding tissue coefficient.