title: Complementary computer generated holography for aesthetic watermarking.
abstract: We present herein an original solution for the watermarking of holograms in binary graphic arts without unaesthetic diffractive effect. It is based on the Babinet principle of complementary diffractive structures adapted to Lohmann-type computer generated holograms. We introduce the concept and demonstrate its interest for anti-counterfeiting applications with the decoding of a hidden data matrix. A process of thermal lithography is used for the manufacturing of binary graphic arts containing complementary computer generated holograms.
authors.affiliation: CEA, LETI, MINATEC campus, DOPT, SIONA, 17 rue des Martyrs, Grenoble, 38054, France. christophe.martinez@cea.fr
authors.forename: Christophe
authors.initials: C
authors.lastname: Martinez
authors.forename: Olivier
authors.initials: O
authors.lastname: Lemonnier
authors.forename: Fabien
authors.initials: F
authors.lastname: Laulagnet
authors.forename: Alain
authors.initials: A
authors.lastname: Fargeix
authors.forename: Florent
authors.initials: F
authors.lastname: Tissot
authors.forename: Marie Françoise
authors.initials: MF
authors.lastname: Armand
mesh_terms: D000465:Algorithms; D044962:Data Compression / Q000379:methods*; D006696:Holography / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D010151:Paintings