Communications: electrical – Digital comparator systems
Patent
1975-08-11
1976-10-19
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
3401463AQ, G06K 913
Patent
active
039874117
ABSTRACT:
A character recognition system utilizing precisely designed correlation network to match the voltage waveform of a character being read with the closest ideal waveform in a standard character font along with an extraneous peak detector that determines whether extraneous peaks are present in the voltage waveform and a required peak detector that determines whether a predetermined pattern of required peaks are missing from the voltage waveform for that voltage waveform to have been induced by the printed character with which it was preliminarily identified, under the control of a variable threshold controlled timing circuit for an extended dynamic range of voltage waveforms.
REFERENCES:
patent: 3103646 (1963-09-01), Sheaffer, Jr. et al.
patent: 3221303 (1965-11-01), Bradley
patent: 3638238 (1972-01-01), Milford et al.
patent: 3868635 (1975-02-01), Shah et al.
Hickman Steven C.
Kruklitis Karlis
Ratkowski Christopher J.
Boudreau Leo H.
Burroughs Corporation
Fissell, Jr. Carl
Redman Leon E.
Taylor Ronald L.
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