Image processing unit processing pixel data according to scan li

Details Image processing unit processing pixel data according to scan li Image processing unit processing pixel data according to scan li

1993-02-17

1995-04-18

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358447, 358451, 358453, 358456, 382 54, G06K 940, H04N 140, H04N 1393, H04N 1387

Patent

active

054083389

ABSTRACT:
An image processing unit comprises an image scanning unit for scanning an original at a plurality of predetermined line densities, a smoothing unit for smoothing the intensity of each pixel, the intensity of each pixel being corrected to be the average intensity of a predetermined number of pixels surrounding each pixel in a predetermined pixel area, a binarizing unit for binarizing the corrected pixel by a half-tone processing, and a pixel area changing unit for changing the pixel area based on the line density employed by the image scanning unit. The intensity of each pixel may be corrected, by using pixels included in the predetermined pixel area, based on the existence of a pixel corresponding to a contour or a fine line in the original in the pixel area. A clear image of a mesh picture is obtained without generation of moire, blurring of contours, or breaking of fine lines.

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