Image analysis – Image compression or coding – Predictive coding
Reexamination Certificate
2007-12-11
2007-12-11
Rogers, Scott A. (Department: 2625)
Image analysis
Image compression or coding
Predictive coding
C382S242000, C382S244000, C382S186000, C382S187000
Reexamination Certificate
active
10492154
ABSTRACT:
A method of compressing a digital ink input is disclosed. The digital ink includes a sequence of strokes, each stroke being represented as a series of digital words representing x and y co-ordinates, the compressed digital ink data including, for each stroke, at least one reference co-ordinate expressed in absolute terms, with subsequent co-ordinates being expressed in terms of an offset from a co-ordinate, estimated using linear prediction, such that a given co-ordinate may be determined on the basis of the previous m co-ordinates as formula (1); whereare coefficients dependent on the nature of the digital ink, and α represents either an x or a y co-ordinate.
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