Image analysis – Histogram processing – For setting a threshold
Patent
1991-01-07
1992-03-10
Mancuso, Joseph
Image analysis
Histogram processing
For setting a threshold
382 13, 382 30, G06K 900
Patent
active
050955101
ABSTRACT:
The stress wave activity produced in a surface by a writing instrument during the generation of a given piece of handwriting is detected by a transducer and is electrically processed. The stress wave activity is compared with a stress wave activity, produced during at least one previous generation of the given piece of handwriting, held in a store, by a processing unit in order to determine whether the detected and stored handwriting pieces have a common author. If the detected and stored handwriting pieces are determined to have a common author a weighted average of the stored stress wave activity and the detected stress wave activity is produced. The weighted average includes a weighted average of the amplitudes and a weighted average of times of events. This weighted average stress wave activity then replaces the stored stress wave activity in the store. This allows natural variations in the way an individual writes a given piece of handwriting to be accommodated without false indications of inauthenticity.
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patent: 4724542 (1988-02-01), Williford
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Sakoe et al., "Dynamic Programming Algorithm Optimization for Spoken Word Recognition", IEEE Transactions On Acoustics, Speech, and Signal Processing, vol. ASSP-26, No. 1, Feb., 1978, pp. 43-49.
Mancuso Joseph
Rolls-Royce plc
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