Computer graphics processing and selective visual display system – Computer graphics processing – Attributes
Reexamination Certificate
2007-01-24
2010-06-22
Caschera, Antonio A (Department: 2628)
Computer graphics processing and selective visual display system
Computer graphics processing
Attributes
C345S581000, C345S589000, C345S601000, C345S602000, C345S604000, C345S644000, C358S518000
Reexamination Certificate
active
07742058
ABSTRACT:
An output color profile, such as an ICC output profile, contains a look-up table to separate the color of a pixel, for example a CIELAB color, into a set of colorant values, for example CMYK colorants. In practice, most CMYK images have been separated using one of a limited set of standardized output profiles. The problem to be solved is guessing which one of these standardized output profiles has been used to separate a specific image. For this purpose the CMYK values of the image are analyzed. The analysis involves calculating a distance in the CMYK space between the CMYK values of an image, and the CMYK values produced by different output profiles. A profile is selected based on these distances, for example by selecting the profile yielding the shortest distance. This profile is then used for converting the CMYK colorant values of the image into CIELAB color values.
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Delabastita Paul
Mahy Marc
Agfa Graphics NV
Caschera Antonio A
Keating & Bennett LLP
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