An extended visual cryptography scheme without pixel expansion for halftone images.

Nazanin Askari Howard M. Heys Cecilia Moloney

Published in: CCECE (2013)

Keyphrases

visual cryptography
visual cryptography scheme
halftone images
black and white
secret sharing scheme
secret sharing
inverse halftoning
gray scale
high capacity
data hiding
input image
error diffusion
gray images
spatial domain
gray level
original images
high quality
image quality
human eyes
digital images