Potential References:
- Hou, Young-Chang. Visual Cryptography for Color Images. Pattern Recognition, Vol. 36, pp.1619-1629, 2003. link
- Simple Method (using 2x2 matrices)
- CYMK color model
- Stacking to recover secret message
- (2, 2) scheme
- Cited by 382!
- Wu, Hsien-Chu, et. al.. Color Visual Cryptography Scheme Using Meaningful Shares. Eighth International Conference on Intelligent Systems Design and Applications. link
- Very similar to above mentioned paper
- Meaningful shares