Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2005-04-08
2008-10-14
Tran, Douglas Q (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S001200, C358S003030
Reexamination Certificate
active
07436547
ABSTRACT:
A computer serving as an image processing device produces pixel groups by assembling a plurality of adjacent pixels among the plurality of pixels forming the image data, and determines the pixel group tone value for each pixel group. Number data corresponding to the pixel tone values of the pixel groups is then obtained based on a predetermined correspondence. At that time, tone errors occurring during the conversion of the pixel group tone value to number data are diffused to the surrounding pixel groups so as to be reflected in the calculation of the pixel group tone values. The computer outputs the resulting number data to a printer. The printer, which serves as an image generating device, determines the position of the pixels by which the dots are formed in the pixel groups based on the number data that has been obtained, and drives a printing head to form dots in those positions. The number data allows smaller amounts of data to be handled more rapidly, and the number data can be produced rapidly by referencing a producing table. The picture quality can be improved by the diffusion of errors. High quality images can thus be rapidly output by a simple process.
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Martine & Penilla & Gencarella LLP
Seiko Epson Corporation
Tran Douglas Q
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