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Proceedings Paper

Geometric enumerated chrominance watermark embed for spot colors
Author(s): Robert Lyons; Alastair Reed; John Stach
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Paper Abstract

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.

Paper Details

Date Published: 21 March 2013
PDF: 6 pages
Proc. SPIE 8664, Imaging and Printing in a Web 2.0 World IV, 86640J (21 March 2013); doi: 10.1117/12.2009488
Show Author Affiliations
Robert Lyons, Digimarc Corp. (United States)
Alastair Reed, Digimarc Corp. (United States)
John Stach, Digimarc Corp. (United States)

Published in SPIE Proceedings Vol. 8664:
Imaging and Printing in a Web 2.0 World IV
Qian Lin; Jan P. Allebach; Zhigang Fan, Editor(s)

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