Facsimile and static presentation processing – Natural color facsimile
Patent
1993-12-15
1995-12-19
Coles, Sr., Edward L.
Facsimile and static presentation processing
Natural color facsimile
358513, 358514, 358482, 358483, 348272, 348280, 348281, H04N 146, H04N 104
Patent
active
054773458
ABSTRACT:
The present invention relates to subsampling processors and a three color sensor array that may be employed to supply subsampled chrominance data to a printing machine, a computer memory device or other device. In one embodiment of the present invention, a three color array of the present invention scans features of an object using an array of one or more subsampling sensor sets spanning a fast scan direction width of n times m (preferrably 2) pixels, with each set having aligned in a slow scan direction column m pixel-sized green sensors aligned in a fast scan direction line for determining pixel-by-pixel green color and luminance, a red sensor extending m pixels wide in said fast scan direction and m pixels long in said slow scan direction for detecting red color and a blue sensor extending m pixels wide in said fast scan direction and m pixels long in said slow scan direction for detecting blue color. Depending on the sensor array employed, the processor employs subsampling techniques and/or subsampled chrominance data to transform the outputs into X, Y and Z tristimulus values and thereafter to L*, a* and b* values corresponding to features of the object scanned.
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Coles Sr. Edward L.
Lee Thomas D.
Webber Don L.
Xerox Corporation
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