Abstract
Several methods of concealing an image in a different hardcopy image are presented. The hidden image is secured since only a spatial digital, or optical, correlator equipped with an undecipherable key function can reveal the concealed image from the visible picture. The techniques and their robustness to noise and distortions are demonstrated.
Original language | English |
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Pages (from-to) | 44-54 |
Number of pages | 11 |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 4789 |
DOIs | |
State | Published - 1 Dec 2002 |
Event | Algorithms and Systems for Optical Information Processing VI - Seattle, WA, United States Duration: 9 Jul 2002 → 10 Jul 2002 |
Keywords
- Binary optics
- Fourier optics
- Halfton image reproduction
- Optical correlators
- Spatial filtering
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering