Image analysis – Pattern recognition – On-line recognition of handwritten characters
Reexamination Certificate
2005-05-24
2005-05-24
Lee, Thomas D. (Department: 2624)
Image analysis
Pattern recognition
On-line recognition of handwritten characters
C382S198000, C382S203000, C382S241000
Reexamination Certificate
active
06898315
ABSTRACT:
A feature extractor samples points on an input pattern drawn in real time. In addition to X and Y coordinates, each sample has an up/down or Z coordinate value representing whether or not the sample point is a perceptible part of the pattern. The groups of coordinate values are transformed into respective sets of coefficients of Chebyshev polynomials by least-squares fit. A recognition unit can use the coefficients as features to identify the character. Additional features, such as aspect ratio and center of gravity, are also derived to aid in recognizing the pattern or reconstructing its image.
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Law Offices of Albert S. Michalik PLLC
Lee Thomas D.
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