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

Sudhir Keshari; Shri Gopal Modani

doi:10.1117/1.JEI.21.3.033018

18 September 2012 Color image encryption scheme based on 4-weighted fractional Fourier transform

Sudhir Keshari, Shri Gopal Modani

Author Affiliations +

Journal of Electronic Imaging, Vol. 21, Issue 3, 033018 (September 2012). https://doi.org/10.1117/1.JEI.21.3.033018

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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Sudhir Keshari and Shri Gopal Modani "Color image encryption scheme based on 4-weighted fractional Fourier transform," Journal of Electronic Imaging 21(3), 033018 (18 September 2012). https://doi.org/10.1117/1.JEI.21.3.033018

Published: 18 September 2012

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