The sense of contrast perceived by a viewer of an image is quantified and adequate image processing is carried out on image data based on the sense of contrast. Contrast-sense quantification means generates unsharp image data of the image data and then generates a histogram of the unsharp image data....http://www.google.com.au/patents/US7068328?utm_source=gb-gplus-sharePatent US7068328 - Method, apparatus and recording medium for image processing
