Holograms are widely used on various security documents including banknotes. They change their appearance depending on the viewing angle and lighting conditions. Consequently, they are hard to forge but also hard to inspect, especially for laypeople. We investigated hologram inspection with off-the-shelf mobile devices within an extensive research effort, involving detection and inspection including an in-depth treatment of human-computer interaction.

• Feasibility of hologram recording and inspection
• Feasibility of hologram detection
• Automatic hologram inspection
• Design of holograms for mobile inspection

Notes: These approaches were developed at Graz University of Technology for Bundesdruckerei GmbH.

Publications:

• A. Hartl, J. Grubert, D. Schmalstieg and G. Reitmayr. “Mobile Interactive Hologram Verification”, Proceedings of the 12^th IEEE International Symposium on Mixed and Augmented Reality, 2013
• A. Hartl, C. Arth and D. Schmalstieg. “AR-based Hologram Detection on Security Documents using a Mobile Phone”, International Symposium on Visual Computing, 2014
• A. Hartl, J. Grubert, C. Arth, C. Reinbacher and D. Schmalstieg. “Mobile User Interfaces for Efficient Verification of Holograms”, IEEE Virtual Reality, 2015
• A. Hartl, W. A. Isop, C. Arth and D. Schmalstieg. “Towards Mobile Recognition and Verification of Holograms Using Orthogonal Sampling”, 1^st Workshop on Visual Recognition and Retrieval for Mixed and Augmented Reality, 2015
• A. Hartl, C. Arth, J. Grubert and D. Schmalstieg. “Efficient Verification of Holograms Using Mobile Augmented Reality”, Transactions on Visualization and Computer Graphics, 2015