ELECTRO-OPTICS LABORATORY
Department of Electrical and Computer Engineering
Hidden images in halftone pictures
A method of concealing an image in a different halftone image is proposed. Continuous-tone levels of the visible images are represented by the area of the halftone dots. However, the hidden image is encoded by the dots’ positions inside their cells. Only a spatial correlator with a unique filter function can reveal the hidden image from the halftone picture. The technique and its robustness to noise and distortions are demonstrated.
| Publication language | English |
| Pages | 3346-3353 |
| Journal | Applied Optics |
| Volume | 40 |
| Issue number | 20 |
| Publication status | Published - 10.07.2001 |
ASJC Scopus subject areas
Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering
