Patent ID: 6731788
Filing Date: 2004-05-04
Classification: G06F,G06K,G11B

Abstract:
A device for classifying symbols in an image data stream containing symbols, comprising:an image data storage unit with an input connected to capture data from said image data stream and an output; an image processor, connected to said image data storage unit output, programmed to detect an image coextensive with a symbol to be classified embedded therein; said image processor including a back propagation neural network (BPNN) trained on a feature space; said feature space including at least two shape-dependent features; said image processor being programmed to derive a feature vector from said image based on said feature space and to apply said feature vector to said BPNN to classify said symbol, wherein: said image processor is programmed to identify feature points in said image; and said at least two shape-dependent features include a measure of an incidence of angles appearing in a triangulation of said feature points.