Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2008-03-18
2008-03-18
Poon, King Y. (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S003230, C358S003260, C358S003060, C358S501000, C358S001900, C358S002100, C358S535000, C358S534000, C358S465000, C347S131000, C347S184000, C399S181000
Reexamination Certificate
active
07345791
ABSTRACT:
An image processing device for processing an input image so as to reproduce a halftone, includes: a matrix setting section for setting a threshold matrix having a plurality of elements arranged in M columns×N rows, at least two threshold values being stored in each of the elements; an element specifying section for specifying a corresponding element of the threshold matrix in accordance with a position of a pixel in the input image; and a multilevel signal generating section for fetching the threshold values from the specified element and for generating a multilevel signal by transforming an input pixel value to one of multiple levels in accordance with the fetched threshold values; wherein the multilevel signal generating section outputs a constant value Doutmin as the multilevel signal when a first condition that the input pixel value is smaller than or not larger than a minimum value of the threshold values, is satisfied; the multilevel signal generating section outputs a constant value Doutmax when a second condition that the input pixel value is larger than or not smaller than a maximum value of the threshold values, is satisfied; and the multilevel signal generating section outputs an interpolation value between the two constant values Doutmin and Doutmax by carrying out a predetermined operation when both of the first condition and the second condition are not satisfied.
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Frishauf Holtz Goodman & Chick P.C.
Kau S.
Konica Corporation
Poon King Y.
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