Communications: electrical – Digital comparator systems
Patent
1978-11-03
1980-05-20
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
G06K 904
Patent
active
042041937
ABSTRACT:
A pattern recognition system in which the visual image of the scanned character or pattern is placed within a defined area, referred to as a video space, which contains ideally only picture elements associated with the character to be recognized. Initial alignment of the visual image in the video space is made by one of several prior art techniques (e.g., mark on the form). The pattern of picture elements in this video space are analyzed to determine what the visual image represents and the coded representation of this character is transmitted to associated equipment which includes apparatus for specifying the ideal coordinates or position of the recognized visual image in the video space. To aid in alignment of subsequent visual images in the video space, selected alignment features of the analyzed visual image are computed and these selected features are compared with ideal feature alignment values for the particular character being recognized. The differences between the selected feature values and the ideal feature alignment values are used as alignment correction values for subsequent characters to be aligned in the video space. The recognition of these subsequent characters is more accurate because of the enhanced alignment of the visual images in the video space.
REFERENCES:
patent: 3160855 (1964-12-01), Holt
patent: 3223973 (1965-12-01), Chatten
patent: 3231860 (1966-01-01), Chatten
patent: 3295105 (1966-12-01), Gray et al.
patent: 3506807 (1970-04-01), Malaby
patent: 3613081 (1971-10-01), Morimoto
patent: 4034343 (1977-07-01), Wilmer
patent: 4110737 (1978-08-01), Fahey
Boudreau Leo H.
Grosser George E.
International Business Machines - Corporation
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