19 March 2003 Image encryption and the fractional Fourier transform
Author Affiliations +
A number of methods have been recently proposed in the literature for the encryption of 2-D information using optical systems based on the Fractional Fourier Transform. In this paper a brief review of the methods proposed to date is presented. A new technique based on a random shifting algorithm is proposed. The new method is compared numerically to the existing methods. A measure of the strength/robustness of the level of encryption of the various techniques is proposed and a comparison is carried out between the methods. Optical implementations are discussed as are robustness of the systems with respect to misalignment and random noise.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Bryan M. Hennelly, John T. Sheridan, "Image encryption and the fractional Fourier transform", Proc. SPIE 4877, Opto-Ireland 2002: Optical Metrology, Imaging, and Machine Vision, (19 March 2003); doi: 10.1117/12.463691; https://doi.org/10.1117/12.463691

Back to Top