Abstract
This paper proposes a multi-image encryption method based on ghost imaging of Hadamard basis patterns and spatial multiplexing. In the encryption process, firstly, the pixels of each original image are rearranged in ascending order, and then each image rearranged is transformed by Fourier transformation. Most of the spectral information of the images after Fourier transformation is concentrated in the central part, which is sampled by spectrum clipping. Multiple sampled images are combined into one image by spatial multiplexing technology after inverse operation of Fourier transformation is performed. Finally, the combined image is encrypted by ghost imaging using Hadamard basis patterns to obtain ciphertext. In the decryption process, the original plaintext images are reconstructed by compressive sensing algorithm using Hadamard basis patterns and the position index matrices of each original image. We prove the safety and robustness of the proposed method through numerical simulation analysis. Theoretical analysis and numerical simulation analysis prove the safety and robustness of the proposed method.
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Acknowledgements
This study is supported by the Natural Science Foundation of Shanghai (Grant no. 18ZR1425800), the Open Project of Anhui Province Key Laboratory of Nondestructive Evaluation (Grant no. CGHBMWSJC03), and the National Natural Science Foundation of China (Grant no. 61875125).
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Yuan, X., Zhang, L., Chen, J. et al. Multiple-image encryption scheme based on ghost imaging of Hadamard matrix and spatial multiplexing. Appl. Phys. B 125, 174 (2019). https://doi.org/10.1007/s00340-019-7286-9
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DOI: https://doi.org/10.1007/s00340-019-7286-9