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Authenticate Digital Prints with Glossmark™ Images

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Glossmark™ technology is a digital watermarking process that embeds a visually striking gloss image within a high quality color print without the need of a special paper or toner. It utilizes the angular dependence of image gloss to create a differential-gloss image through the modulation of halftone structures. Both the primary image and the embedded Glossmark™ image can be distinctively viewed from different perspectives with little interference. The strong directional nature of the gloss and the subtle halftone modulation process make Glossmark™ images very difficult to detect by a scanner and even more challenging to reproduce through scanning and printing. Its distinct visual effect which is highly desirable for security printing makes it stand out among various halftone modulation technologies. Its differential gloss appearance which originates from the image surface roughness modulation offers better protection against counterfeiting than technologies that utilize only “plain” halftone modulations. Well-designed quality Glossmark™ images are optical variable devices (OVD's) ideally suitable for document authentications. Its digital implementation provides a capability to embed variable data as digital watermarks into individual prints quickly and economically.

Document Type: Research Article

Publication date: January 1, 2004

More about this publication?
  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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