Abstract
We propose two approaches to encrypt color images based on interference and virtual optics. In the first method, a color image is first decomposed into three independent channels, i.e., red, green and blue. Each channel of the input image is encrypted into two random phase-only masks based on interference. In the second method, a color image is first converted into an image matrix and a color map, and only the image matrix is encrypted into random-phase masks based on interference. After the phase masks are retrieved, a concept based on virtual optics is further applied to enhance the security level. Numerical simulations are demonstrated to show the feasibility and effectiveness of the proposed methods.
Original language | English |
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Pages (from-to) | 409-415 |
Number of pages | 7 |
Journal | Optics and Laser Technology |
Volume | 42 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 Mar 2010 |
Externally published | Yes |
Keywords
- Color image encryption
- Fractional Fourier transform (FRFT)
- Interference
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering
- Atomic and Molecular Physics, and Optics