Image-processing apparatus, an image-forming apparatus, and...

Details Image-processing apparatus, an image-forming apparatus, and... Image-processing apparatus, an image-forming apparatus, and...

2005-10-27

2010-02-09

Thompson, James A (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003030, C358S003060, C358S003210, C358S003240

Reexamination Certificate

active

07660016

ABSTRACT:
An image-processing apparatus for quantizing multi-level (M-level) image data into N-level values, where M>N>1, using a multi-level error-diffusion process or a minimum-average multi-level error method is disclosed.The image-processing apparatus includes: means for outputting correction data; means for setting a quantization-threshold value; means for comparing the correction data and the quantization-threshold value so as to output N-level image data; and means for calculating an error generated with generating the N-level image data.

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May 29, 2008 European Search Report in connection with counterpart European Patent application No. 05800529.9.

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