Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2006-01-17
2010-06-08
Haskins, Twyler L (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S001900, C358S003050, C358S003060, C358S003260, C382S252000, C345S616000
Reexamination Certificate
active
07733531
ABSTRACT:
An image processing apparatus includes: an image data acquiring unit that acquires image data formed of plural pixel data having an M-ary (M≧3) gradation value; a grouping unit that divides the image data acquired into J (J≧2) image data areas and sections the J image data areas into K (2≦K≦J) groups; a pixel data selecting unit that selects, for each of the image data areas forming the respective groups, predetermined pixel data out of pixel data included in the image data area; an N-arization processing unit that applies the N-arization (M>N≧2) processing to the pixel data selected on the basis of a predetermined threshold value; and an error diffusing unit that diffuses a difference between a value of the selected pixel data and a value after the N-arization processing for the selected pixel data to pixel data not subjected to the N-arization processing, wherein the error diffusing unit diffuses the difference in directions different from one another in two or more groups of the K groups.
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Oshima Atsushi
Takahashi Toru
Harness & Dickey & Pierce P.L.C.
Haskins Twyler L
Payer Paul F
Seiko Epson Corporation
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