Shifting technique for signature verification
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United States of America Patent
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-
Dec 31, 1985
Grant Date -
N/A
app pub date -
Dec 30, 1983
filing date -
Dec 30, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A signature verification system includes means for obtaining acceleration data and pressure data related to a given signature and means for comparing that data with reference data previously obtained from an identified signer. The correlations between segments of a reference pressure signal and a sample pressure signal are computed. This process involves successively measuring the correlation as the two segments are shifted with respect to each other. The amount of the shifts that produce the maximum correlations between the pressure signal segments is stored in memory, and these shift values are utilized to determine the correlations of respective pairs of segments of the acceleration data. Since the acceleration data is not independently shifted in computing the correlations, substantial processing time is saved. In addition, the overall performance of the signature verification system is improved both in terms of processing time and in error rate as compared to the prior system.
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