21 March 2013 Geometric enumerated chrominance watermark embed for spot colors
Author Affiliations +
Most packaging is printed using spot colors to reduce cost, produce consistent colors, and achieve a wide color gamut on the package. Most watermarking techniques are designed to embed a watermark in cyan, magenta, yellow, and black for printed images or red, green, and blue for displayed digital images. Our method addresses the problem of watermarking spot color images. An image containing two or more spot colors is embedded with a watermark in two of the colors with the maximum signal strength within a user-selectable visibility constraint. The user can embed the maximum watermark signal while meeting the required visibility constraint. The method has been applied to the case of two spot colors and images have been produced that are more than twice as robust to Gaussian noise as a single color image embedded with a luminance-only watermark with the same visibility constraint.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Robert Lyons, Robert Lyons, Alastair Reed, Alastair Reed, John Stach, John Stach, "Geometric enumerated chrominance watermark embed for spot colors", Proc. SPIE 8664, Imaging and Printing in a Web 2.0 World IV, 86640J (21 March 2013); doi: 10.1117/12.2009488; https://doi.org/10.1117/12.2009488


Watermark embedding in optimal color direction
Proceedings of SPIE (March 21 2013)
Watermarking spot colors in packaging
Proceedings of SPIE (March 03 2015)
Watermark copy attack
Proceedings of SPIE (May 08 2000)

Back to Top