Image encryption based on the random rotation operation in the fractional Fourier transform domains

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• 作者：Zhengjun Liu ; She Li ; Meng Yang ; Wanyu Liu ; Shutian Liu
• 关键词：Random rotation operation ; Pixel scrambling ; Amplitude encoding ; Phase encoding
• 刊名：Optics and Lasers in Engineering
• 出版年：2012
• 出版时间：October, 2012
• 年：2012
• 卷：50
• 期：10
• 页码：1352-1358
• 全文大小：1817 K

文摘

A kind of image encryption scheme is presented by using a rotation operation being regarded as the scrambling scheme of the pixels. The rotation operation is composed of rotation center, radii and angle. For the data of phase and amplitude of complex number, the rotation operation is performed with random controlling parameters iteratively. The parameters are random and serve as the key of this encryption method. Subsequently, the fractional Fourier transform is introduced to alter the values of image pixel. The process mentioned above will be achieved many times for enhancing the security of the proposed algorithm. Numerical simulation is given to demonstrate the validity and performance of the image hiding procedure.