Communications: electrical – Digital comparator systems
Patent
1978-11-15
1980-09-30
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
364726, G06K 900, A61B 510
Patent
active
042258502
ABSTRACT:
Signalling means for enhancing the performance of automatic fingerprint identification systems by reducing system response to non-fingerprint-like regions within an image field pattern of interest. A two dimensional generalized sequency analyzer, such as a fast Fourier transform machine, responsive to a binary coded image signal identifies discrete frequency terms occurring within a selected bandwidth corresponding to a spatial frequency region of interest, associated with a fingerprint image. Logic means, responsive to the sequency analyzer, further identifies the relative energy levels of the bandwidth-limited spectral content of the binary coded image signal to signal the identity of a non-fingerprint-like region within the scanned image.
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patent: 4160237 (1979-07-01), McMahon
Chang Tien-Lin
Kabaian Jimmy H.
Riganati John P.
White Stanley A.
Boudreau Leo H.
Hamann H. Fredrick
Humphries L. Lee
Pitts Rolf M.
Rockwell International Corporation
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