Hologram Watermarks for Document Authentications

Jana Dittmann, Lucilla Croce Ferri, Claus Vielhauer. Hologram Watermarks for Document Authentications. In 2001 International Symposium on Information Technology (ITCC 2001), 2-4 April 2001, Las Vegas, NV, USA. pages 60-64, IEEE Computer Society, 2001. [doi]