Handwritten Image Filter for Enabling Effective Display With Least Points
Original Publication Date: 1985-Jan-01
Included in the Prior Art Database: 2005-Feb-18
This handwriting display technique reduces the number of sampling points that must be retained in storage for effectively displaying handwritten shapes. This is accomplished by filtering out superfluous points which are generated when the pen motion is erratic, very slow or has no significant curvature or other change of direction. The filtering scheme utilizes three independent selection criteria to eliminate any sampling point that (l) is too close to the point at which the pen was placed upon the paper to begin writing, or (2) is displaced by less than a predetermined minimum distance from the previously retained point, or (3) has less than a predetermined angular displacement from the direction in which the pen was traveling when the previously retained point was sampled.