Color extended visual cryptography using error diffusion

This paper introduces a color visual cryptography encryption method that produces meaningful color shares via visual information pixel (VIP) synchronization and error diffusion halftoning. VIP synchronization retains the positions of pixels carrying visual information of original shares throughout the color channels and error diffusion generates shares pleasant to human eyes. Comparisons with previous approaches show the superior performance of the new method.

• Type: Conference
• Year: 2009
• Where: ICASSP
• Authors: In Koo Kang, Gonzalo R. Arce, Heung-Kyu Lee
• Keywords: Color Visual Cryptography, Error Diffusion, ICASSP 2009, Meaningful Color Shares, Signal Processing