具有理想对比度的可视密码方案

Perfect contrast visual cryptography scheme

提出了一种可视密码方案,该方案基于完美的黑度可视密码方案(PBVCS)和非完美的可视密码方案(NPBVCS),应用简单的布尔运算和移位运算,获得了理想的对比度。同时实现了重构的图像与原秘密图像保持一致,没有像素扩展,而且运算简单,易于实现。

A perfect contrast visual cryptography scheme with the best contrast based on both the perfect black visual cryptography scheme （PBVCS） and the non-perfect black visual cryptography scheme （NPBVCS） was proposed. The proposed scheme applied simple Boolean operations to keep the consistency between the reconstructed image and the original secret image without pixel expansion and was easy to run.