28 February 2001 Three-dimensional image security
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Abstract
In this work we describe a method for optoelectronic encryption of 3D images based in digital holography. Phase-shift digital holography is used to record the complex ampli-tude distribution of the Fresnel diffraction patterns generated by a 3D object illuminated with coherent light. First, we review a technique to encrypt optically the information contained in a 2D object by using digital holography. The method is then extended to encrypt 3D information. In both cases encryption is performed by using random phase codes as key functions. Decryption can be carried out optical or digitally. We also show that, after decryption, 3D objects can be reconstructed digitally with different perspec-tives by performing simple operations on the decrypted hologram. Experimental results are presented.
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Enrique Tajahuerce, Enrique Tajahuerce, Bahram Javidi, Bahram Javidi, } "Three-dimensional image security", Proc. SPIE 10298, Three-Dimensional Video and Display: Devices and Systems: A Critical Review, 102980G (28 February 2001); doi: 10.1117/12.419787; https://doi.org/10.1117/12.419787
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