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Digital watermarking and data hiding with narrow-band absorption materials

  • US 9,754,341 B2
  • Filed: 03/17/2016
  • Issued: 09/05/2017
  • Est. Priority Date: 03/20/2015
  • Status: Active Grant
First Claim
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1. A printed package for a retail product, the printed package comprising a substrate, the substrate comprising a first area and a second area, in which the first area and the second area comprise adjacent non-overlapping areas, the first area comprising a first offset ink or a first flexography ink printed thereon, the printed package comprising a non-contiguous coating, the non-contiguous coating comprising a narrow-band absorption material with a spectral absorbance peak or maximum in a range of 630 nm-710 nm, the coating applied over portions of both the first area and the second area in a 2D pattern representing an encoded digital watermark signal, the 2D pattern being redundantly applied on the printed package, in which the printed package comprises more area within the first area and the second area without the coating than area within the first area and the second area with the coating, and in which one or more instances of the 2D pattern are detectable from machine-analysis of imagery, in which the imagery corresponds to illumination of the printed package, the illumination comprising an illumination peak or maximum in the range of 630 nm-710 nm.

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