Color visual cryptography schemes for black and white secret images.
Roberto De PriscoAlfredo De SantisPublished in: Theor. Comput. Sci. (2013)
Keyphrases
- visual cryptography scheme
- secret image
- visual cryptography
- black and white
- secret sharing scheme
- digital imaging
- secret sharing
- halftone images
- human eyes
- barcode
- spatial domain
- digital images
- image data
- gray images
- reconstructed image
- secret information
- gray level
- original images
- image editing
- error diffusion
- input image
- image quality
- hough transform
- frequency domain
- test images
- color information
- gray value
- pixel values
- human vision
- synthetic and real images