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Optical Engineering

Hybrid certificate validation technique based on Fresnel encoding
Author(s): Kenan Wu; Jiasheng Hu; Xu Wu
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Paper Abstract

An optic-electronic hybrid certificate validation technique based on Fresnel encoding is proposed. A confirming experiment has been carried out. This technique consists of two processes: encoding and decoding. During the encoding process, an original image is encoded by a computer into an encoded image, which is subsequently printed on a certificate. During the decoding process, the encoded image is extracted from the certificate and decoded optically. The experimental result proves the validity and reveals some advantages of our method. Compared with some previous works, more useful original information can be encoded in our method. The security level of our method is also enhanced by importing the Fresnel diffraction range z as another key. This paper also explores practical application of this technique.

Paper Details

Date Published: 1 September 2008
PDF: 5 pages
Opt. Eng. 47(9) 098201 doi: 10.1117/1.2981561
Published in: Optical Engineering Volume 47, Issue 9
Show Author Affiliations
Kenan Wu, Dalian Univ. of Technology (China)
Jiasheng Hu, Dalian Univ. of Technology (China)
Xu Wu, Dalian Maritime Univ. (China)


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