Fragile digital watermarking by synthetic holograms
Giuseppe Schirripa Spagnolo, Carla Simonetti, Lorenzo Cozzella · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2004
In this article is presented an application of synthetic hologram as fragile watermarking. The proposed technique is a frequency domain watermarking, based on computer generated hologram. Our technique, named Fragile Synthetic Holographic Watermarking (F-SHW), is suitable for ID Cart image authentication. In this paper, the F-SHW is applied to Color Images as well as to Gray Scale ones. The proposed schema is based on the knowledge of original mark from the Authentication Entity, for applying Image Correlation between this and the extracted one. Due to the application the mark is encrypted using a private key (symmetric schema).