Character recognition arrangement

Details Character recognition arrangement Character recognition arrangement

1982-01-04

1985-06-25

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 30, G06K 980

Patent

active

045258600

ABSTRACT:
There is disclosed an algorithm for electronically recognizing characters. The algorithm relies upon the establishment of a particular standard "name" for each character. A name is a sequence of "u"s, "d"s, "l"s, "r"s, and "-"s that describes the path that results when the character is traversed in a particular way. The name contains a "u" when the path goes up, a "d" when it goes down and "l"s and "r"s when it goes left and right respectively. "-"s are used to retrace the path so that a (second or third) branch can be attached to an earlier point in the path. The algorithm constructs a name for an unknown character, and then, using a unique directory lookup algorithm, determines which standard name is closest to the derived name. The algorithm contains a series of rules for traversing characters to minimize ambiguities while still allowing a great deal of latitude in the recognition process. Under the procedure disclosed, no prior knowledge is required pertaining to the actual font or design of the character to be recognized.

REFERENCES:
patent: 3609685 (1971-09-01), Deutsch
patent: 3863218 (1975-01-01), Oka et al.
patent: 4020463 (1977-04-01), Himmel
patent: 4034344 (1977-07-01), Saraga et al.
patent: 4040009 (1977-08-01), Kadota et al.
patent: 4162482 (1979-07-01), Su
patent: 4204232 (1980-05-01), Mizuno
patent: 4310827 (1982-01-01), Asai

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