The following publications are possibly variants of this publication:
- A multiple-level visual secret-sharing scheme without image size expansionYung-fu Chen, Yung-Kuan Chan, Ching-Chun Huang, Meng-Hsiun Tsai, Yen-Ping Chu. isci, 177(21):4696-4710, 2007. [doi]
- Optimum Pixel Expansions for Threshold Visual Secret Sharing SchemesShyong Jian Shyu, Ming-Chiang Chen. tifs, 6(3-2):960-969, 2011. [doi]
- Aspect ratio invariant visual secret sharing schemes with minimum pixel expansionChing-Nung Yang, Tse-Shih Chen. prl, 26(2):193-206, 2005. [doi]