Facsimile and static presentation processing – Natural color facsimile – Color separation
Reexamination Certificate
2005-05-10
2005-05-10
Miriam, Daniel (Department: 2621)
Facsimile and static presentation processing
Natural color facsimile
Color separation
C358S461000, C382S274000
Reexamination Certificate
active
06891648
ABSTRACT:
An image-reading device is provided. The image-reading device comprises a photoelectric converting element reading a first image from a subject copy, a reference-white member functioning as a reference white used in a white-shading correction, reading means for reading a second image from a constant range on a surface of the reference-white member by using the photoelectric converting element, averaging means for dividing image data of the second image into a plurality of blocks in a sub-scanning direction so that each of the blocks includes a plurality of lines and obtaining average values of image data of the lines in the blocks respectively, peak-value determining means for obtaining a peak value of the average values, and white-shading correcting means for performing the white-shading correction to image data of the first image by using the peak value as white-shading data.
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Fukano Hiroshi
Hattori Hitoshi
Inoue Yoshikazu
Kawamoto Hiroyuki
Kubo Hiroshi
Miriam Daniel
Ricoh & Company, Ltd.
Rosario-Vasquez Dennis
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