Image processing apparatus, image processing method and...

Details Image processing apparatus, image processing method and... Image processing apparatus, image processing method and...

2004-12-16

2009-02-17

Zimmerman, Mark K (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S001900, C358S003010, C358S003060, C358S003160, C358S534000, C382S270000, C345S596000

Reexamination Certificate

active

07492482

ABSTRACT:
An image processing apparatus having an arithmetic processing section for quantizing multi-density level image data and converting the image data into digital halftone image data for outputting. The arithmetic processing section is configured to create a plurality of quantized patterns to determined a dot occurrence information sequence, based on a given initial quantized pattern, such that anti-correlation is increased with respect to the dot occurrence information sequence for a pixel that has already been quantized; to add the plurality of quantized patterns to form a dither mask; and to quantize the multi-density level image data by using the dither mask.

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Dmitri A. Gusev; “Anti-Correlation Digital Halftoning” [online], Aug. 1998, Indiana University (searched on Jul. 1, 2003), Internet <URL http://www.cs.indiana.edu/cgi-bin/techreports/TRNNN.cgi?trnum=TR513>.

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