Patent ID: 6975755
Filing Date: 2005-12-13
Classification: G06K,G06T

Abstract:
1. An apparatus for generating characterization data characterizing features in an image comprising: an image data receiver for receiving data representative of an image; a feature detector for detecting the presence of features represented by image data received by said image data receiver, said feature detector being arranged to determine, for image data representative of a plurality of different sized regions of an image, values representative of the presence of features in the regions; and an image point characterizer for characterizing image points selected as being representative of features in the image data on the basis of the detection by said feature detector, by calculating characterization values for the features, wherein the characterization values are determined utilizing image data for regions of the image including the feature, and wherein said image point characterizer is arranged to determine said characterization values on the basis of image data for different sized regions, the size of the region being selected on the basis of the size of a said region utilized to detect the feature by said feature detector.