Citation
J. Rosen et B. Javidi, Hidden images in halftone pictures, APPL OPTICS, 40(20), 2001, pp. 3346-3353
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
APPLIED OPTICS
ISSN journal
00036935
→ ACNP
Volume
40
Issue
20
Year of publication
2001
Pages
3346 - 3353
Database
ISI
SICI code
0003-6935(20010710)40:20<3346:HIIHP>2.0.ZU;2-T
Abstract
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' posit
ions inside their cells. Only a spatial correlator with a unique filter fun
ction can reveal the hidden image from the halftone picture. The technique
and its robustness to noise and distortions are demonstrated. (C) 2001 Opti
cal Society of America.