Patent ID: 6339655
Filing Date: 2002-01-15
Classification: G06K

Abstract:
A handwritten stroke recognition system for recognizing which, of a plurality of reference strokes, matches an input stroke wherein the input and reference strokes have a plurality of sample points, the system comprising:a reference database for storing tangents of sample points of said reference strokes and stable points of said reference strokes, wherein said stable points are points which generally define the shapes of different types of strokes; a tangent and stable point extractor for determining tangents to at least some of said sample points of said input stroke and for determining which of said sample points between a beginning and end of said input stroke are the stable points of said input stroke; and a stable-point-based classifier for defining substrokes of each of said input stroke and said reference strokes as portions of said strokes having at least one of said stable points at an end thereof, for generating a predetermined number N of generally equally spaced sample points within each substroke, for generating stroke match values indicating the quality of the match between said input stroke and said reference strokes based on a sample-by-sample comparison of said N sample points of each of said substrokes of said input stroke with corresponding said N sample points of said corresponding substrokes of said reference strokes and for selecting the reference stroke providing the best match to said input stroke in accordance with a matching criterion.