Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2011-04-12
2011-04-12
Poon, King Y (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S001900, C358S002100, C358S002990, C358S003220, C358S003240, C358S003260, C358S532000, C358S533000, C382S254000, C382S257000, C382S266000, C382S269000, C382S270000
Reexamination Certificate
active
07924469
ABSTRACT:
In order to eliminate image deterioration based on the characteristics of an output device upon execution of edge emphasis processing, an image processing apparatus includes a setting unit which sets a print characteristic on the print medium, a region setting unit which sets a region, a brightness value derivation unit which derives brightness values, a first derivative derivation which derives first derivatives of the brightness values, an edge direction determination unit which determines an edge direction of brightness, an emphasis level determination unit which determines an emphasis level of a pixel value based on the first derivatives, and a replacement unit which calculates second derivatives of brightness values and replaces a pixel value of a pixel of interest based on the sign of the second derivative.
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Goto Fumihiro
Goto Fumitaka
Hashii Yusuke
Kato Masao
Miyagi Arata
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Poon King Y
Zhu Richard
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