Image processing system with multi-valued processing

Details Image processing system with multi-valued processing Image processing system with multi-valued processing

2005-03-16

2008-10-21

Poon, King (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003140, C358S521000

Reexamination Certificate

active

07440142

ABSTRACT:
An image processing system receives an input gradient number m, input image data I(x,y) whose input gradient number is m, and an output gradient number n and calculates output image data O(x,y) having an output gradient number of n on the basis of the following formula (1).in-line-formulae description="In-line Formulae" end="lead"?O(x,y)=int[α+d(xd,yd)/(gmax+1)]   (1)in-line-formulae description="In-line Formulae" end="tail"?When α is an integer, the output image data O(x,y) is calculated on the basis of a formula obtained by substituting the calculated α′ for α in the above formula (1), whereas when α is not an integer, the output image data O(x,y) is calculated on the basis of the above formula (1).

REFERENCES:
patent: 5640249 (1997-06-01), Rao et al.
“Digital Color Halftoning” by Henry R. Kamg, IEEE Press, SPIE ISBNO-8194-3318-7, pp. 445-449, Nov. 1, 1999.

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