Method and apparatus for tonal correction in binary printing dev

Details Method and apparatus for tonal correction in binary printing dev Method and apparatus for tonal correction in binary printing dev

1994-10-11

1997-04-29

Mancuso, Joseph

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358457, 358459, 358298, H04N 1405

Patent

active

056257554

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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