Abstract
To reduce the heavy transmission burden of multichannel color image encryption algorithms,a single-channel color image encryption algorithm based on cutting spectrum and 2D Arnold transform was presented.In the proposed algorithm,the R,G,B components of the original color image were extracted,and their spectra were obtained separately by the Fractional Fourier Transform(FrFT) of different orders,followed by cutting their spectra to construct a new spectrum,then the combined spectrum was scrambled by the 2D Arnold transform to confuse and diffuse the spectrum information well enough.The encrypted image was a gray image,thus the transmission burden was reduced apparently while the main information of the original color image was kept.The simulation results and performance analyses verify the validity and the security of the encryption algorithm.
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