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Color image encryption scheme based on 4-weighted fractional Fourier transform

[+] Author Affiliations
Sudhir Keshari

Malaviya National Institute of Technology, Department of Electronics and Communication Engineering, Jaipur 302017, India

Shri Gopal Modani

Malaviya National Institute of Technology, Department of Electronics and Communication Engineering, Jaipur 302017, India

J. Electron. Imaging. 21(3), 033018 (Sep 18, 2012). doi:10.1117/1.JEI.21.3.033018
History: Received September 2, 2011; Revised February 8, 2012; Accepted July 12, 2012
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Abstract.  We propose an image encryption technique for color images by using conventional logarithms operator, chaotic map and 4-weighted fractional Fourier transform (4-WFRFT). The color image to be encrypted is initially separated into its primary color channels, red, green, and blue; each channel is concealed inside the same random mask by using the base-changing axiom of logarithms. Subsequently, each logarithmic-concealed channel is encrypted independently by using double random 4-WFRFT plane encoding technique. This technique utilizes two random phase mask that are developed by using a chaotic map. The parameters of RPMs and transform orders of 4-WFRFT utilized in each logarithm channel are considered as secret keys for encryption/decryption process. The robustness of the proposed technique is analyzed and discussed by presenting the experimental results.

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Citation

Sudhir Keshari and Shri Gopal Modani
"Color image encryption scheme based on 4-weighted fractional Fourier transform", J. Electron. Imaging. 21(3), 033018 (Sep 18, 2012). ; http://dx.doi.org/10.1117/1.JEI.21.3.033018


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