Communications: electrical – Continuously variable indicating – With meter reading
Patent
1997-05-19
1999-01-26
Horabik, Michael
Communications: electrical
Continuously variable indicating
With meter reading
34082531, 34082534, 382124, 382116, 382125, 382127, 178 18, 178 17D, 345173, 345174, 345179, H04Q 100
Patent
active
058642960
ABSTRACT:
A technique for detecting and verifying a fingerprint includes a skin resistance sensing array for translating the skin resistance of a fingertip into an electrical signal. The fingertip is moved relative to the skin resistance sensing array in a first linear direction for producing a reference trajectory signal which is stored into a memory. The fingertip is again moved relative to the skin resistance sensing array in a second linear direction for producing a sample trajectory signal. The second linear direction of movement is offset from the first linear direction of movement by a predetermined angle. A processor is provided for performing a set of functions on the reference trajectory signal and the sample trajectory signal. The sample trajectory signal is correlated with the reference trajectory signal for producing a verification signal related to the probability that the fingertip generated both the sample trajectory signal and the reference trajectory signal.
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Dalencourt Yves
Horabik Michael
TRW Inc.
Yatsko Michael S.
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