Processing machine

Details Processing machine Processing machine

1988-02-24

1991-06-18

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 48, 382 10, 382 9, G06K 900

Patent

active

050254758

ABSTRACT:
To determine whether mail address characters are printed or handwritten by a single recognizer (OCR) in a mail processing machine, the front surface of a piece of mail is determined by the presence of a postage stamp, an address window, an address label or by comparing the character areas of both surfaces of the piece of mail. Further, when no stamp and no address window/label are attached, the mail address character area is detected by compressing and binarizing the entire front surface image signals. Thereafter, only the address character image signals corresponding to the detected address window/label or mail address character area are processed through the recognizer.

REFERENCES:
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patent: 3983366 (1976-09-01), Gunn
patent: 4034341 (1977-07-01), Isono et al.
patent: 4158835 (1979-06-01), Miura et al.
patent: 4475234 (1984-10-01), Nishijima et al.
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patent: 4632252 (1986-12-01), Haruki et al.
patent: 4736441 (1988-04-01), Hirose et al.
patent: 4783825 (1988-11-01), Hirose et al.
patent: 4845761 (1989-07-01), Cate et al.
patent: 4868570 (1989-08-01), Davis
Development of Bi-Functional OCR, by Sugita et al., published in Jan. 1981.
Japanese Patent Application Laid-Open No. P61-272891 (abstract).

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