Hybrid encoding method for hiding information by assembling double-random phase-encoding technique and binary encoding method

Applied Optics
Kuang Tsan Lin

Abstract

A hybrid encoding method is used to assemble the double-random phase-encoding technique and the binary encoding method. Because the double-random phase-encoding technique is robust for noises and the binary encoding method is free of using external keys, the proposed hybrid encoding method has their advantages. The hybrid encoding method first encodes a covert image to form a complex-number matrix by using the double-random phase-encoding technique, where two random real-number matrices are used to increase the security of the encoding work. Then the elements of the two random real-number matrices and the elements of the complex-number matrix are encoded to form a binary-bit string by using the binary encoding method. Finally, the binary data in the binary-bit string are encoded into a host image to form an overt image with hidden information by using a gray-value modulation method. The decoding work is easy for authorized people, but it is very difficult for unauthorized people. Therefore, the proposed hybrid encoding method is a very useful encoding method.

References

Mar 23, 2002·Applied Optics·Nobukatsu Takai, Yuto Mifune
Sep 13, 2002·Applied Optics·Sherif Kishk, Bahram Javidi
May 18, 2004·Applied Optics·Osamu Matoba, Bahram Javidi
Feb 21, 2008·Applied Optics·B Javidi, E Ahouzi
Jul 22, 2008·Applied Optics·David S MonaghanJohn T Sheridan

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