Analysis of the HalfTone Visual Cryptography and proposing a model for illustrating the related schemes

摘要

Halftone visual cryptography (HVC) enlarges the area of Visual cryptography (VC) by using halftoning techniques. Halftoning technique is a reprographic technique. The main applications of visual cryptography which includes Moire patterns, Watermarking and many others implies more research work to be done on various schemes regarding visual cryptography especially halftone VC which works in a different and better manner than others. In HVC scheme, a secret image is embedded into halftone shares with meaningful information of the cover images. Meaningful shares are required so as to increase the efficiency of shares management and decrease the suspicion of secret image encryption, thus providing a good image quality as the error diffusion is known to have low complexity. In this paper, we presents an analysis of various construction methods using error diffusion and is guaranteed by the properties of visual cryptography.