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Volume: 32 | Article ID: art00011
Hiding Data in the Blue Channel
  DOI :  10.2352/ISSN.2470-1173.2020.15.COLOR-198  Published OnlineJanuary 2020

To enable the track and trace of pages from a color printer, data must be embedded and recoverable across the entire page regardless of the content on that page. This paper describes a solution that allows low visibility and high detectability of databearing “dot signatures”. An analysis of optimum dot-color to background-color combinations uncovers the serendipitous method of “Blue Clipping,” operating only on the blue component, exploiting low visual sensitivity to the blue channel. Blue Clipping is compared to the method of yellow dots, and the problem of dot gain for shadow dots is addressed. While initially designed for enterprise printers, this new technology is also adding functionality to 3D objects. It enables visually pleasing yet robustly recoverable data markings from a small region anywhere on a printed surface, without the need for costly special inks.

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Robert Ulichney, Matthew Gaubatz, "Hiding Data in the Blue Channelin Proc. IS&T Int’l. Symp. on Electronic Imaging: Color Imaging XXV: Displaying, Processing, Hardcopy, and Applications,  2020,  pp 198-1 - 198-7,

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