Title:
COLOR CHARACTERIZATION WITH ENHANCED PURITY
Document Type and Number:
WIPO Patent Application WO/2005/109855
Kind Code:
A3
Abstract:
The present invention creates a color transform for transforming color image
data from a device-independent color space to a device-dependent color space
of a color device. A forward model is accessed which transforms color image data
from the device-dependent color space to the device-independent color space.
The forward model is iteratively inverted to obtain a plurality of distinct device-dependent
data point value sets, wherein the device-dependent data point value sets are
colorimetrically identical to each other in the device-independent color space.
One device-dependent data point value set is then selected from the plurality
of distinct device-dependent data point value sets based on the application
of a color purity function to the plurality of distinct device-dependent data
point value sets. The color transform is populated with the selected device-dependent
data point value set. Because one device-dependent data point value set is selected
from the plurality of obtained distinct device-dependent data point value sets
based on the application of a color purity function, the inverse color transform
provides the best color estimate among all color candidates that are colorimetrically
equivalent, and accurately recovers original device-dependent color space
values.
Inventors:
TIN SIU-KEI (US)
Application Number:
PCT/US2005/014648
Publication Date:
October 25, 2007
Filing Date:
April 29, 2005
Export Citation:
Assignee:
CANON KK (JP)
TIN SIU-KEI (US)
TIN SIU-KEI (US)
International Classes:
G03F3/08; G06F15/00; G09G5/02; H04N1/60
Foreign References:
| US6919975B1 | 2005-07-19 | |||
| US5739928A | 1998-04-14 |
Attorney, Agent or Firm:
O'NEILL, Michael, K. et al. (Cella Harper & Scinto,30 Rockefeller Plaz, New York NY, US)
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