18 September 2012 Color image encryption scheme based on 4-weighted fractional Fourier transform
Author Affiliations +
J. of Electronic Imaging, 21(3), 033018 (2012). doi:10.1117/1.JEI.21.3.033018
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.
© 2012 SPIE and IS&T
Sudhir Keshari, 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

Image encryption

Symmetric-key encryption

Image processing

Fractional fourier transform

Image transmission

Color image processing


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