Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2003-12-03
2010-12-21
Coles, Edward L (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S001900, C358S003040, C358S003050, C358S003060, C358S524000, C382S162000, C382S166000, C382S167000, C382S252000, C347S005000, C347S006000, C347S054000, C347S080000, C347S100000
Reexamination Certificate
active
07855809
ABSTRACT:
An image processing apparatus executes an error diffusion process to multivalue image data consisting of a plurality of density components. A first processor executes the error diffusion process by changing at least one of a quantization threshold value and a quantization diffusion coefficient which are used for the error diffusion process based on a value of the multivalue image data of the density components or a value calculated from the multivalue image data value. A second processor executes the error diffusion process by setting the quantization threshold value and the quantization diffusion coefficient which are used for the error diffusion process into fixed values. An error diffusion processing controller controls to execute the error diffusion process to at least one color among the density components by the first processor and execute the error diffusion process to other density components by the second processor.
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Kato Masao
Ono Mitsuhiro
Yamada Akitoshi
Canon Kabushiki Kaisha
Coles Edward L
Fitzpatrick ,Cella, Harper & Scinto
Kau Steven
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