Method of detecting a processing area of a document for an image

Details Method of detecting a processing area of a document for an image Method of detecting a processing area of a document for an image

1990-03-28

1992-08-18

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358452, H04M 100

Patent

active

051404400

ABSTRACT:
A method of detecting a particular area of a document where an image to be processed exists, and applicable to an image forming apparatus. Image information representative of an image printed on a document and position information representative of a marked area of the image data are detected. The image information lying in the marked area is extracted, erased, inverted as to black and white or otherwise processed on the basis of the detected image information and position information and without a mark being directly written on the document.

REFERENCES:
patent: 4538183 (1988-08-01), Kanno et al.
patent: 4733304 (1988-03-01), Homma et al.
patent: 4985930 (1991-01-01), Takeda et al.

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