Adaptive character extraction method and system

Details Adaptive character extraction method and system Adaptive character extraction method and system

1985-11-08

1988-05-03

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 54, G06K 940

Patent

active

047425571

ABSTRACT:
A method and a system for extracting character information from a signal matrix of gray level picture elements which compares pixel elements positioned in annular rings around a central pixel of interest to determine neighbor pair occurrences for purposes of eliminating spurious signals and for establishing a threshold for each document read which is used to eliminate undesired signals from the signal matrix.

REFERENCES:
patent: 3715724 (1973-02-01), Demonte et al.
patent: 3737855 (1973-06-01), Cutaia
patent: 4544393 (1986-03-01), Blackwell et al.
patent: 4554593 (1985-11-01), Fox et al.
patent: 4646355 (1987-02-01), Petrick et al.
patent: 4656665 (1987-04-01), Pennebaker

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