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Correction of Wild Points Within an Electronic Tablet Data

IP.com Disclosure Number: IPCOM000038665D
Original Publication Date: 1987-Feb-01
Included in the Prior Art Database: 2005-Jan-31

Publishing Venue

IBM

Related People

Authors:
Kim, J Tappert, CC [+details]

Abstract

Electronic tablets are used to record images of handwriting and drawings. This is done by recording periodically the x-y coordinate points obtained from the dynamic trace of a stylus moving over the tablet. An indication of pen up-down is also recorded and the coordinate points are generally recorded only when the pen is down. Thus, information is obtained of the strokes used in the writing or drawing. A stroke is the data from pen down to pen up. Writing with a special stylus on an electronic tablet has some differences from writing with pen or pencil on paper. The correspondence between the shape of the writing or drawing and the data points electronically recorded is not always precise. Apart from inaccuracies due to tablet resolution and sampling rate, data are sometimes poorly recorded due to tablet error.