Character recognition apparatus

Details Character recognition apparatus Character recognition apparatus

1983-10-20

1985-09-17

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 47, 382 59, G06K 922

Patent

active

045425264

ABSTRACT:
An apparatus for recognizing a character (including an alpha-numeric character, mark or other character) written using a stylus applied to a tablet which stylus and tablet include an arrangement for providing an indication of position of the stylus with respect to a surface of the tablet. The character recognition apparatus determines the length and gradient (slope) of line segments of strokes drawn by a user which strokes combine to form characters. After determining length and gradient of a line segment, there is assigned to the line segment a distinctive code. A particular character is determined by examining the order of codes which define particular combinations of strokes. Recognition of characters is carried out in substantially real time.

REFERENCES:
patent: 3111646 (1963-11-01), Harmon
patent: 3133266 (1964-05-01), Frishkopf
patent: 3875331 (1975-04-01), Hasenbalg
patent: 4061998 (1977-12-01), Ito
patent: 4075605 (1978-02-01), Hilley et al.
patent: 4180800 (1979-12-01), Isshiki et al.

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