06052481 is referenced by 149 patents and cites 8 patents.

A system and method for processing stroke-based handwriting data for the purposes of automatically scoring and clustering the handwritten data to form letter prototypes. The present invention includes a method for processing digitized stroke-based handwriting data of known character strings, where each of the character strings is represented by a plurality of mathematical feature vectors. In this method, each one of the plurality of feature vectors is labelled as corresponding to a particular character in the character strings. A trajectory is then formed for each one of the plurality of feature vectors labelled as corresponding to a particular character. After the trajectories are formed, a distance value is calculated for each pair of trajectories corresponding to the particular character using dynamic time warping method. The trajectories which are within a sufficiently small distance of each other are grouped to form a plurality of clusters. The clusters are used to define handwriting prototypes which identify subcategories of the character.

Title
Automatic method for scoring and clustering prototypes of handwritten stroke-based data
Application Number
8/300426
Publication Number
6052481
Application Date
September 2, 1994
Publication Date
April 18, 2000
Inventor
Yen Lu Chow
Saratoga
CA, US
Kamil A Grajski
San Jose
CA, US
Agent
Sawyer & Associates
Assignee
Apple Computers
CA, US
IPC
G06K 9/62
G06K 9/48
G06K 9/00
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