ELECTRO-OPTICS LABORATORY
Department of Electrical and Computer Engineering
Concealogram
An image within an image
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.
| Publication language | English |
| Pages | 44-54 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 4789 |
| Publication status | Published - 01.12.2002 |
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
