Communications: electrical – Digital comparator systems
Patent
1978-12-22
1980-06-03
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
3401463AE, G06K 900
Patent
active
042064414
ABSTRACT:
A palm pattern detector detects a palm pattern and produces an analog signal corresponding to the palm pattern. The analog signal is converted into a palm bit pattern corresponding to a palm pattern comprised of a number of bit data. Bit data corresponding to the contour of a palm from the palm bit pattern is read out and a contour bit pattern is formed. A displacement between adjacent bit data of the contour bit pattern is detected and is coded into slope code information. A slope change between adjacent line components of the palm contour is detected from adjacent slope code information to obtain a curvature code information. The curvature code information representing a concave part of the palm contour is removed from the curvature code information and the curvature code information reperesenting the convex part is used as a personal feature parameter in the personal identification.
REFERENCES:
patent: 3576537 (1971-04-01), Ernst
patent: 3576538 (1971-04-01), Miller
patent: 3581282 (1971-05-01), Altman
patent: 3636513 (1972-01-01), Tisdale
patent: 3648240 (1972-03-01), Jacoby et al.
patent: 3766520 (1973-10-01), Patterson
patent: 4032889 (1977-06-01), Nassimbene
patent: 4083035 (1978-04-01), Riganati et al.
Boudreau Leo H.
Tokyo Shibaura Denki Kabushiki Kaisha
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