Halftone visual cryptography with minimum auxiliary black pixels and uniform image quality.
Xuehu YanShen WangXiamu NiuChing-Nung YangPublished in: Digit. Signal Process. (2015)
Keyphrases
- halftone images
- image quality
- visual cryptography
- black and white
- error diffusion
- inverse halftoning
- pixel values
- halftoning algorithm
- visual quality
- gray scale
- human visual system
- perceptual quality
- digital images
- gray level
- gray images
- secret sharing scheme
- visual cryptography scheme
- data hiding
- original images
- high quality
- image data
- quality assessment
- bit rate
- compression ratio
- reconstructed image
- secret image
- data compression
- binary patterns
- color images
- direct binary search