Communications: electrical – Digital comparator systems
Patent
1978-08-01
1979-05-08
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
235456, G06K 900
Patent
active
041538951
ABSTRACT:
A mark sense reader is disclosed that views each document individually to ascertain how each individual person has marked the document in regard to the density of each mark and then sets a reading threshold for that person. Each mark is scanned, divided into individual cells and a mark quality is determined. Erasures and smudges are differentiated from intended marks.
REFERENCES:
patent: 3619569 (1971-11-01), Hoehn et al.
patent: 3761876 (1973-09-01), Flaherty et al.
patent: 4064484 (1977-12-01), Mese et al.
Dorr et al., "Thresholding Method for a Mark Reading System", IBM Tech. Disclosure Bulletin, vol. 15, No. 8, Jan., 1973. pp. 2595-2596.
Crawford, "Pictorial Information Disector and Analyzer System" IBM Tech. Disclosure Bulletin, vol. 15, No. 1 Jun. 1972, pp. 61-62.
Eby, Jr. John C.
Weisbrod James G.
Boudreau Leo H.
Recognition Equipment Incorporated
Vandigriff John E.
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