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Image Analysis

Arrangement-for-mapping-colors-between-imaging-systems-and-method-therefor

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Details

Inventors: Edge, Christopher J.; Fischer, Timothy A.; Rozzi, William A.;
Assignee: Minnesota Mining and Manufacturing Company (St. Paul, MN)
Primary Examiner: Hjerpe; Richard A.
Assistant Examiner: Tran; Henry N.
Attorney, Agent or Firm: Bauer; William D.

A color mapping method is used in transforming colors between color imaging systems. The method includes using forward transformation profiles that characterize the color imaging systems to generate respective sets of device-independent color values for the color imaging systems. Color conversions are calculated by reducing differences between the respective sets of device-independent color values. Based on these color conversions, a color map is constructed that describes a relationship between the color imaging systems.

DETAILED DESCRIPTION According to one embodiment, the present invention is directed to a color mapping method for use in transforming colors between color imaging systems.
The color mapping method includes using forward transformation profiles characterizing the color imaging systems to generate respective sets of device-independent color values for the color imaging systems.
Color conversions are calculated by iteratively reducing differences between the sets of device-independent color values.
This difference reduction is also optionally performed on black channel information to obtain a mapping of black channels between the color imaging systems.
A color map describing a relationship between the color imaging systems is constructed by using the predicted color conversions.
This method may be performed by a color mapping arrangement or a computer-executable program stored on a data storage medium.
According to another embodiment of the present invention, color mapping between imaging systems is accomplished by a conversion using profiles that characterize the color imaging systems to generate respective sets of device-independent color values for the source color imaging system and converting to the device-dependent data values of the destination color imaging system by performing a color conversion using the profiles.
The device-independent color values have the same dimensionality as the corresponding color imaging systems.
The color conversion can be used to improve its own accuracy relative to a quality threshold.
The color conversion is used to define a color map for transforming colors between the color imaging systems.
Another embodiment of the present invention is directed to a color mapping arrangement for use in transforming colors between imaging systems.
A computer arrangement uses forward transformation profiles that characterize the color imaging systems to generate respective sets of device-independent color values for the color imaging systems.
The computer arrangement also calculates color conversions by iteratively reducing differences between the sets of device-independent color values

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