Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2005-09-29
2010-06-22
Haskins, Twyler L (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S003090, C358S003140, C358S003210
Reexamination Certificate
active
07742195
ABSTRACT:
An image printing process of the invention first specifies a pixel group tone value of each pixel group consisting of a preset number of multiple pixels and refers to one of correlation maps selected for the pixel group to convert the specified pixel group tone value to a multivalue code. Each of the correlation maps sets multivalue codes in correlation to pixel group tone values. The multivalue codes of all pixel groups constituting an image are output as control data to an image output device. The image output device determines the dot on-off state in respective pixels of each pixel group according to the received control data and actually creates dots on an output medium to complete an output image. Each correlation map referred to for the multivalue coding has a slightly lower tone resolution in a higher tone value area than in a lower tone value area. This arrangement desirably reduces the data volume of the control data, while preventing deterioration of the picture quality. The technique of the invention enables quick output of the control data and accordingly ensures high-speed output of a high-quality image by this simple procedure.
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Haskins Twyler L
Martine & Penilla & Gencarella LLP
Seiko Epson Corporation
Suazo David L
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