Communications: electrical – Digital comparator systems
Patent
1974-04-22
1976-08-24
Cook, Daryl W.
Communications: electrical
Digital comparator systems
235 6111E, 3401463MA, G06K 900, G06K 710
Patent
active
039769739
ABSTRACT:
Variations in scan rate and in position of a character within a field resulting from positional inaccuracies caused by use of a hand-held scanning device and/or loosely constrained document printing mechanisms and techniques are accommodated by sweeping a two-dimensional sensing array of about one character width and several character heights horizontally along a line across the field and applying a matrix of output signals resulting from each character to a recognition unit. Each set of signals is shifted vertically through the recognition unit at a rate such that all cells of the array are scanned in an interval required for movement of the field on the array of less than one resolution cell. Character recognition is attempted for each one-cell-height increment that the set is vertically shifted. A recognition output signal is produced when a character in the shifted set is brought into registration with a set of inputs leading to the recognition unit.
REFERENCES:
patent: 3105956 (1963-10-01), Greanias et al.
patent: 3184732 (1965-05-01), Haynes
patent: 3277286 (1966-10-01), Preston et al.
patent: 3613080 (1971-10-01), Angeloni, Sr. et al.
patent: 3634823 (1972-01-01), Dietrich et al.
Martin Charles E.
Muir by William
Requa, deceased Stanley C.
Cook Daryl W.
Recognition Equipment Incorporated
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