Optical image encryption technique based on compressed sensing and Arnold transformation |
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Authors: | Xiaoyong Liu Yiping Cao Pei Lu Xi Lu Yang Li |
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Institution: | 1. Opto-Electronics Department, Sichuan University, Chengdu 610064, PR China;2. Key Laboratory of Ecophysics and Department of Physics, College of Science, Shihezi University, Shihezi 832000, PR China;3. College of Information Science and Technology, Shihezi University, Shihezi 832000, PR China;4. No. 34 Research Institute of China Electronics Technology Group Corporation (CETC), Guilin 541004, PR China |
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Abstract: | A new optical image encryption method based on compressed sensing and Arnold transformation is proposed. First, dimensional reduction and random projection, the characteristics of compressed sensing, are utilized to compress and encrypt a digital image. Second, Arnold transformation is used to scramble the encryption image followed by compressed sensing with low data volume. Then, the encryption image is encrypted again by double random phase encoding optical encryption technique; two random phase masks generated by sequences of irrational number are been used as secret keys. In the end, the multi-encrypted information is embedded into the host image and transmitted. At the receiver, original image information is reconstructed approximately via orthogonal matching pursuit algorithm. The peak signal-to-noise ratio and the normalized cross-correlation between the original image and the decrypted one are used to calculate the quality of the decryption image. The experimental results demonstrate that our method is secure and robust. |
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Keywords: | Compressed sensing Arnold transformation Double random phase encoding technique Key |
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