Steven D Hickman

US Patent:

39874117, Oct 19, 1976

Filed:

Aug 11, 1975

Appl. No.:

5/603592

Inventors:

Karlis Kruklitis - Plymouth MI
Christopher J. Ratkowski - Dearborn MI
Steven C. Hickman - Inkster MI

Assignee:

Burroughs Corporation - Detroit MI

International Classification:

G06K 913

US Classification:

3401463C

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.