Image Processing

Investigation of digital hologram watermarking with double binary phase encoding

[+] Author Affiliations
Xiaohong Zhou, Linsen Chen, Jie Shao

Soochow University, Institute of Information Optical Engineering, China 215006 E-mail: xiaozhouzxh@hotmail.com

Opt. Eng. 44(6), 067007 (Jun. 20, 2005). doi:10.1117/1.1935268
History: Received May 21, 2004; Revised Jan. 6, 2005; Accepted Jan. 7, 2005; Jun. 20, 2005; Online June 20, 2005
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We propose a new method of digital watermarking with the double binary optical phase encoding technique. The iterative Fourier transform algorithm (IFTA) is used to generate the binary phase structures. The combination of two binary phase structures, in which one is used to encode the hidden image and the other is used as the encryption phase key, is inserted as a watermark into the host image. The effects of phase levels of binary phase holograms on the quality of extracted image are analyzed, and the results show that the 2/2 phase level combination is a better scheme for watermarking than other multiple combinations. We also present the principle of the encrypting key. Both analysis and experimental results illustrate that this technique is of high security and robust against the printing and scanning process. © 2005 Society of Photo-Optical Instrumentation Engineers.

© 2005 Society of Photo-Optical Instrumentation Engineers

Citation

Xiaohong Zhou ; Linsen Chen and Jie Shao
"Investigation of digital hologram watermarking with double binary phase encoding", Opt. Eng. 44(6), 067007 (Jun. 20, 2005). ; http://dx.doi.org/10.1117/1.1935268


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