Title :
Reality-preserving image encryption associated with the generalized Hilbert transform
Author :
Xue-mei Li ; Tao, Ran ; Dai, Liu-ling ; Wang, Yue
Author_Institution :
Dept of Electron. & Inf. Eng., Beijing Electron. Sci. & Technol. Inst., Beijing, China
Abstract :
A novel image encryption technique is proposed associated with the generalized Hilbert transform in this paper. Two schemes of this technique are presented in generating real encrypted image and recovering the original image. The encrypted image is real-valued without data expanding, which can benefit the digital processing of images by electronic computers where speed of computation is important. The angles of the 2-D fractional Fourier transform, the phase of the fractional Hilbert transform and the pixel permutation matrix are as keys in the proposed method, which can improve the security of the image encryption. The mean square error between the decrypted and original real image is evaluated; and the robustness with respect to the blind encryption is performed. Simulation results show the validity of the proposed technique.
Keywords :
Fourier transforms; Hilbert transforms; cryptography; image coding; mean square error methods; 2D fractional Fourier transform; generalized Hilbert transforms; mean square error method; pixel permutation matrix; reality-preserving image encryption; Cryptography; Fourier transforms; Frequency; Image analysis; Image reconstruction; Image storage; Mean square error methods; Pixel; Signal analysis; Signal processing;
Conference_Titel :
Industrial Electronics, 2009. ISIE 2009. IEEE International Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-4347-5
Electronic_ISBN :
978-1-4244-4349-9
DOI :
10.1109/ISIE.2009.5213144