Method and apparatus for image processing capable of high...

Details Method and apparatus for image processing capable of high... Method and apparatus for image processing capable of high...

2007-11-06

2007-11-06

Moore, David (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003010, C358S003030

Reexamination Certificate

active

10032446

ABSTRACT:
In a image processing apparatus executing an error diffusion process, normal error diffusion process is performed when an input pixel value is not “0”. When the input value is “0” (white pixel), “0” is automatically output, error memory of the pixel is reset, and calculation and distribution of the error are not performed. Accordingly, the speed of processing of the image processing apparatus can be improved. Further, by setting smaller the threshold value in error diffusion, the influence caused by resetting of the error memory and delay in generating a dot can be prevented.

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patent: 6501566 (2002-12-01), Ishiguro et al.
Robert W. Floyd et al., “An Adaptive Algorithm for Spatial Greyscale”, Proceeding of the S.I.D. vol. 17/2 Second quarter 1976, pp. 75-77.

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