Curve-Based Data Hiding for Protecting Map Document (ISR IP)
For more information, contact ISR External Relations Director
Jeff Coriale at email@example.com or 301.405.6604.
Inventors: Min Wu, Hongmei Gou
Curves, or non-linear shapes, are major components appearing in maps, drawings, signatures and other documents. A huge amount of such documents are being brought to the digital domain owing to the popularity of scanning devices and pen-based devices (such as the TabletPC). Hiding digital watermarks or other secondary data in curves can facilitate digital rights management of important documents in government, intelligence and commercial operations. For example, trace-and-track capabilities can be provided through embedding a unique ID, referred to as a digital fingerprint, to each copy of a document before distributing to users to deter the unauthorized leak of classified documents outside an allowed group.
Inventors at the University of Maryland have developed a new data-hiding algorithm for curves by parameterizing a curve using the B-spline model and adding spread spectrum sequences in curve parameters. They have demonstrated the feasibility of proposed algorithm in collusion-resistant fingerprinting applications for writings/drawings from pen-based input as well as topographic maps.
For more information
If you would like to license this intellectual property, have questions, would like to contact the inventors, or need more information, contact ISR External Relations Director Jeff Coriale at firstname.lastname@example.org or 301.405.6604.
Published June 22, 2007