Image processing apparatus and method for improving image reprod

Details Image processing apparatus and method for improving image reprod Image processing apparatus and method for improving image reprod

1997-09-29

2000-07-18

Lee, Thomas D.

Facsimile and static presentation processing

Static presentation processing

Attribute control

347254, 358300, G06K 900

Patent

active

060915129

ABSTRACT:
An image processing apparatus for subjecting input image data to a density conversion includes three dot isolation circuits which subject the pixels on each of a plurality of lines adjoining in the sub-scan direction to a density conversion in accordance with a different predetermined conversion characteristic (LUT) for each line. Though each dot separation circuit deals with a different number of lines of image data to undergo a density conversion, the predetermined conversion characteristics can be set in advance in such a manner that the density values of a plurality of pixels on adjoining line will be preserved if an overall view of the reproduced image is taken.

REFERENCES:
patent: 4800442 (1989-01-01), Riseman et al.
patent: 4873428 (1989-10-01), Takeuchi et al.
patent: 5818498 (1998-10-01), Richardson et al.

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