Patent ID: 6965702
Filing Date: 2005-11-15
Classification: G06K,G06T

Abstract:
1. A method of sharpening a digital image having image pixels according to its noise content, comprising the steps of: generating a noisy pixel belief map corresponding spatially to the image pixels having belief values indicating the likelihood that the modulation about respective pixels are due to system noise, said noisy pixel belief map being based upon both a local noise measure of pixels of the digital image and a noise table separate from said digital image; and using the noisy pixel belief map to vary a variable parameter of an image sharpener; wherein the step of generating a noisy pixel belief map comprises the steps of; creating a low resolution version of the digital image; generating a low resolution noisy pixel belief map from the low resolution version of the digital image; and interpolating the low resolution noisy pixel belief map to produce the noisy pixel belief map.