Optical correlation system

Details Optical correlation system Optical correlation system

1988-04-08

1989-02-28

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 9, 382 31, 35016213, 209584, 209900, G06K 976

Patent

active

048093408

ABSTRACT:
Invention provides optical correlation apparatus comprised of optical means producing a light image of the mailpiece including the address information, holographic filter means receiving the optical means light image and producing a filtered light image correlated to an address information reference pattern, detector means receiving the holographic filter means filtered light image and producing an output electronic signal which contains the degree of correlation of the mailpiece address information to the address information reference pattern, and signal processor means receiving the detector means output electronic signal and producing an address location signal based on a high degree of correlation of the mailpiece address information to the address information reference pattern.

REFERENCES:
patent: 3566137 (1971-02-01), Lemmond
patent: 3604778 (1971-09-01), Burckhardt
patent: 3873181 (1975-03-01), Chivian et al.
patent: 3914742 (1975-10-01), Munster et al.
patent: 4013338 (1977-03-01), Sato et al.
patent: 4037918 (1977-07-01), Kato
patent: 4094011 (1978-06-01), Nagao
patent: 4735486 (1988-04-01), Leib

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