確率論的観点からの画像割符の定式化(第2報)

Abstract

In this paper,we consider to formulate an image data hiding scheme based on error diffusion.By using the scheme, visual patterns are embedded in a halftone image with out affecting its perceptual quality depending on a halftone key image. The scheme has the feature of visual cryptography with respect to extracting of the embedded patterns, i.e., when we print the two halftone images on to transparencies and stack them together, the embedded patterns are visible by human visual system without any special electronic calculation. We propose a formulation for the scheme in the view of astochastic analysis. The idea is basic, but theoretical studies by formulating is important trial in this field.