Signature matching
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United States of America Patent
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Nov 26, 2002
Issued Date -
N/A
app pub date -
Feb 16, 1999
filing date -
Sep 6, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention is of an 'elastic matching' method for comparing one signature against another, comprising the operations of creating a mapping between corresponding points in two signatures to be compared measured at different times after the commencement of writing the signatures which maximizes the correlation between the local spatial neighborhood of the measured points and simultaneously minimizes the curvature of the elastic spatial distortion from the mapping, providing quantitative measures of both the degree of the spatial correlations and the degree of the non-uniform spatial distortions in the mapping, thereby providing measures of the similarity between the signatures.
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