Enhancement of Information Carrying and Decoding for Visual Cryptography with Error Correction
Ching‐Nung Yang, Xiaotian Wu, Min-Jung Chung · ACM Transactions on Multimedia Computing Communications and Applications · 2023
Recently, three visual cryptography schemes with t -error-correcting capability (VCSs- t EC) were introduced for preventing the shadows carrying additional information from being corrupted by noise interference. However, the concerns on VCS- t EC, such as the average amount of carrying information, decoding of information from shadows, and the demonstration way of a secret, should be considered and improved. In this article, two schemes, namely the ( k, n ) probabilistic VCS- t EC (PVCS- t EC) and the (2, n ) deterministic VCS- t EC (DVCS- t EC), are proposed. The concept of probabilistic VCS is combined with the Bose-Chaudhuri-Hocquenghem code (BCH code) for designing the ( k, n ) PVCS- t EC. Furthermore, some constant-weight BCH codewords are adopted to build the (2, n )-DVCS- t EC. Comprehensive results and experiments are demonstrated to clarify the enhancement of information-carrying and decoding by the two proposed methods.