Similarity determination among patterns using affine-invariant features
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United States of America Patent
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Feb 17, 1998
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N/A
app pub date -
May 9, 1995
filing date -
Jul 6, 1992
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Expired
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Abstract
Pattern recognition, for instance optical character recognition, is achieved by forming a skeletal representation (400) of a pattern (300), processing the skeletal diagram (400) to improve representation of curved lines (308) in the pattern (300), representing the processed skeletal diagram (500) by a connectivity matrix (602), and finding a minimum spectral distance between the connectivity matrix (602) and a set of template matrices corresponding to known patterns.
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