Method of compressing digital ink
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United States of America Patent
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Jan 19, 2010
Grant Date -
Feb 19, 2009
app pub date -
Oct 6, 2008
filing date -
Nov 16, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of compressing a digital ink input including a sequence of strokes is provided in which each stroke is represented as a series of digital words representing x and y co-ordinates, at least one reference co-ordinate of each stroke is expressed in absolute terms, and a co-ordinate other than the at least one reference co-ordinate is expressed as an offset from a preceding co-ordinate. The co-ordinate other than the at least one reference co-ordinate is represented as a combination of an estimate determined from the previous m co-ordinates and a residual error value.
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