Image data processing method and apparatus with mixture of simpl

Details Image data processing method and apparatus with mixture of simpl Image data processing method and apparatus with mixture of simpl

1991-12-24

1994-03-29

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358453, 358458, 358455, 358448, 358443, H04N 140

Patent

active

052990303

ABSTRACT:
The present invention relates to a binary image processing method and apparatus for outputting a document image data inputted from an image input device through a binary image output device. The present invention comprises an A/D converting part for converting an analog image data signal applied from a image sensing element into a digital signal, a simple binarization processing part for transforming the image data signal applied from the A/D converting part into a simple binary image data signal, a pseudo intermediate tone processing part for transforming the image data signal applied from the A/D converting part into a binary image data signal having a gradation component, an image data coordinate system processing part for detecting the window portion of an image and outputting the control signal Cxy corresponding to the window mode select signal WMS, a data selecting part for selecting either the binary image data applied from the simple binarization processing part or the binary image data applied from the pseudo intermediate tone processing part by the control signal Cxy appiled from the image data coordinate system processing part. In processing an image comprising a text portion and a photograph portion, the present invention processes the image of the text portion with the simple binarization processing method and processes the image of the photograph portion with the pseudo intermediate tone processing method, thereby improving the picture quality of the reproduced image.

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patent: 4723173 (1988-02-01), Tanioka
patent: 5001767 (1991-03-01), Yoneda et al.
patent: 5014124 (1991-05-01), Fujisawa
patent: 5079638 (1992-01-01), Kishi et al.
patent: 5101438 (1992-03-01), Kanda et al.
patent: 5128748 (1992-07-01), Murakami et al.
patent: 5172291 (1991-12-01), Sekizawa

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