Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2004-03-17
2009-11-03
Lee, Thomas D (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C382S243000
Reexamination Certificate
active
07612911
ABSTRACT:
The purpose of the image processing device is to convert color image data rapidly to data expressed by the dot on/off state. A plurality of adjacent pixels is grouped as a first type of block, and judgment of the dot on/off state performed by suitably using the error diffusion method is performed in block units. The image data after the color conversion used for this judgment is stored once in memory in a compressed state according to the result of edge detection for the block, and when necessary, judgment of the dot on/off state is performed while reading from the memory. The image processing device realizes the judgment rapidly while avoiding making more complex the judgment of the dot on/off state performed in block units. Also, the image data is compressed according to the result of edge detection, so it is possible to read and write rapidly in relation to memory, and furthermore to decompress rapidly. The image processing device rapidly performs the process of color converting color image data and converting data expressed by the dot on/off state without making the processing contents more complex.
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Brinich Stephen M
Lee Thomas D
Martine & Penilla & Gencarella LLP
Seiko Epson Corporation
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