Image processing device capable of reproducing a book document

Details Image processing device capable of reproducing a book document Image processing device capable of reproducing a book document

1997-05-02

1998-08-04

Frahm, Eric

Facsimile and static presentation processing

Facsimile

Recording apparatus

358452, 358453, 358474, 355 25, 399187, 399189, 399362, H04N 104, H04N 1387, G03B 2732, G03B 2100

Patent

active

057902623

ABSTRACT:
In a device for processing a signal representative of a document image from a document reading unit to thereby reproduce the document image, a first comparator binarizes a multilevel image signal from the document reading unit with a first threshold value to thereby output a first bilevel image signal. A second comparator binarizes the multilevel image signal with a second threshold value to thereby output a second bilevel image signal. An area discriminating circuit outputs, in response to the second bilevel image signal, an area discriminate signal representative of the inside and or outside of an image area of the document image. An area separating circuit outputs, in response to the area discriminate signal and first bilevel image signal, an image signal representative of only an image portion of the first bilevel image signal which corresponds to the area discriminate signal. The device is capable of reproducing both a sheet document and a book document accurately.

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