Scanner calibration technique
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United States of America Patent
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Oct 17, 2000
Grant Date -
N/A
app pub date -
Sep 9, 1996
filing date -
Sep 9, 1996
priority date (Note) -
Expired
status (Latency Note)
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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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