Facsimile and static presentation processing – Natural color facsimile – Image reproduction
Patent
1994-10-21
1996-10-08
Vu, Kim Yen
Facsimile and static presentation processing
Natural color facsimile
Image reproduction
358500, 358515, 358518, 347 43, H04N 146, B41J 221
Patent
active
055637248
ABSTRACT:
A process is provided for creating an inktable from a superset of n inks by subdividing the n inks into k subsets of ink groupings, where any given subset contains m.sub.j number of inks selected from the superset of n inks; where the subscript j denotes a particular subset (the j-th subset) in the overall set of k subsets and whose range is 1.ltoreq.j.ltoreq.k. The process includes the steps of generating a multiple-color target of color patches for each of a series of k inksets; deriving colorimetric data for each multiple-color target by measuring the color patches; constructing a plurality of forward models which respectively relate ink-to-color for each of the k inksets; constructing a subgamut from each forward model; constructing a supergamut from the union of all subgamuts; compressing out-of-gamut colors to the supergamut to thereby map out-of-gamut colors to printable colors which are within or at the surface of the supergamut; for a given color, attempting to invert the forward model of all k inksets in order to obtain an inking; generating a predicted inking from previous points on path in colorspace; selecting a final inking from set of successful inversions which represent the closest match to the predicted inking.
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Maureen C. Stone, Color Gamut Mapping & The Printing of Digital Color Images, ACM Transactions on Graphics, vol. 7, No. 4, Oct. 1988, pp. 249-292.
Boll Harold
Gregory Scott
Eastman Kodak Company
Nguyen Madeleine Anh-Vinh
Owens Raymond L.
Vu Kim Yen
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