Image processing method and image processing apparatus

Details Image processing method and image processing apparatus Image processing method and image processing apparatus

1993-11-29

1995-09-12

Reinhart, Mark J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

H04N 121

Patent

active

054502080

ABSTRACT:
The image processing apparatus for smoothing edges in a reproduced image includes an image data generating circuit for generating image data including a specified pixel and a plurality of pixels surrounding the specified pixel; a sub-pixel data generating circuit for dividing the specified pixel included in the image data into N sub-pixels, for detecting the condition of the specified pixel and the condition of the plurality of pixels surrounding the specified pixel included in the image data by matching the image data with a plurality of predetermined patterns, and for generating sub-pixel data for determining the number and position of sub-pixels to be exposed of the N sub-pixels, based on the condition of the specified pixel and the condition of the plurality of pixels surrounding the specified pixel; and supplying circuit for supplying the sub-pixel data to exposure circuit which makes exposure. The sub-pixel data generating circuit generates sub-pixel data for exposing M sub-pixels of the N sub-pixels, when the specified pixel is detected to be an exposed pixel which requires no exposure correction, where M is smaller than N.

REFERENCES:
patent: 4361394 (1982-11-01), Sakai et al.
patent: 4437122 (1984-03-01), Walsh et al.
patent: 4847641 (1989-07-01), Tung
patent: 5131058 (1992-07-01), Ting et al.
patent: 5249242 (1993-09-01), Hanson et al.

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