Almost-aspect-ratio-invariant visual cryptography without adding extra subpixels.

Ching-Nung Yang Che-Yu Lin

Published in: Inf. Sci. (2015)

Keyphrases

aspect ratio
visual cryptography
secret sharing scheme
perspective projection
camera parameters
bounding box
focal length
secret image
frequency domain
high quality
multiscale
denoising
post processing
human eyes