Communications: electrical – Digital comparator systems
Patent
1977-06-22
1978-12-19
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
G06K 912
Patent
active
041308190
ABSTRACT:
An optical character recognition device including means to define a scanning area which includes portions of a printed character to be scanned by a television camera, said camera scanning discrete points of said area arranged in spaced vertical paths, and including means to measure the optical density of the character portion encountered at each point and to assign a binary-coded numerical value to each point and to store each of said numerical values in a matrix-like fashion corresponding to the respective point's position in said scanning area. Electronic circuitry is also provided to derive a plurality of identifying characteristics from said numerical values which uniquely describe the scanned character, said identifying characteristics then being compared to the identifying characteristics of a predetermined number of reference characters by application of predetermined comparison criteria to determine which reference character is the closest match to the scanned character, said closest reference character is then outputted, and means are also provided for modifying the identifying characteristics of said reference characters to compensate for type irregularities and typing ribbon wear.
REFERENCES:
patent: 3346845 (1967-10-01), Fomenko
patent: 3873972 (1975-03-01), Levine
patent: 3999161 (1976-12-01), Van Bilzem et al.
Adams John W.
Adams John W.
Boudreau Leo H.
Seifried Hildegarde
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