Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
851550 | Optik - International Journal for Light and Electron Optics | 2011 | 4 Pages |
Abstract
We present a novel multi-image encryption and decryption algorithm based on Fourier transform and fractional Fourier transforms. Lower frequency parts of the original images are selected, frequency shifted and encrypted by using double phase encoding in fractional Fourier domains. Multiple images are encrypted together into a single one. A simple optical setup is given to implement the proposed algorithm. This scheme has features of enhancement in decryption accuracy and high optical efficiency. Numerical results have been given to verify the validity and efficiency of the proposed scheme.
Related Topics
Physical Sciences and Engineering
Engineering
Engineering (General)
Authors
Zhengjun Liu, Yan Zhang, Haifa Zhao, Muhammad Ashfaq Ahmad, Shutian Liu,