Patent №
US 6,993,149
Granted
2006-01-31
Filed 2001
Owner
DIGIMARC CORPORATION
Lab
—
AI components
2
vision · planning
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
09963344
The present invention relates to digitally watermarking spot color images. In one embodiment, an original spot color is replaced with a combination of cyan (C), magenta (M) and yellow (Y) components and the original spot color. The CMY components convey a digital watermark. Preferably, a large percentage halftone process screens the spot color. This screened spot color is combined with the CMY components. Combining the CMY components with a large percentage halftone screening results in a watermarked image color that closely approximates to the original spot color. In another embodiment, a spot color is halftone-screened to a percentage of its original intensity. The screened-back spot color is modulated to accommodate a watermark signal.
AI classification
Ownership
DIGIMARC CORPORATION
assignment · 124360833
Assignors
BRUNK, HUGH L., ALATTAR, OSAMA M.
On an employer assignment, the assignors are typically the inventors.