Facsimile and static presentation processing – Natural color facsimile – Measuring – testing – and calibrating
Patent
1996-09-09
2000-10-17
Grant, II, Jerome
Facsimile and static presentation processing
Natural color facsimile
Measuring, testing, and calibrating
358520, H04N 140
Patent
active
061340294
ABSTRACT:
An efficient technique for calibrating a scanner relative to a particular colorant set having N primary colorants. Once the scanner is calibrated, the scanner's device-dependent tristimulus values for an arbitrary color are transformed to a device-independent representation of the arbitrary color in a computationally efficient manner. The technique exploits the fact that the color space defined by the primary colorants can be advantageously partitioned, with each partition being represented by a transformation matrix that accurately characterizes the transformation for that partition of the space. The partitioning is characterized by a set of M key colors (in a specific embodiment, M=2N), each of which defines a boundary between adjacent partitions.
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Grant II Jerome
Light Source Acquisition Company
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