Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1994-10-11
1997-01-07
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358456, 358454, 382252, G06K 1500
Patent
active
055925928
ABSTRACT:
An image preprocessing method and apparatus processes image data line-by-line using an error diffusion or dithering process to generate a halftoned image in which the radius of a dot representing a pixel is /dpi.ltoreq.r.ltoreq..sqroot. 2/dpi The method and apparatus selectively performs the halftone process on every other pixel to reduce in consumption and computation time while maintaining a high resolution.
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Coles Sr. Edward L.
Janofsky Eric B.
Legree Tracy M.
Seiko Epson Corporation
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