Visual Cryptography and Secret Image Sharing

Contents

List of Figures

List of Tables

Preface

Contributors

1 Visual Cryptography from Halftone Error DiffusionGonzalo R. Arce, Zhongmin Wang, and Giovanni Di Crescenzo

1.1 Introduction

1.1.1 Visual Cryptography

1.1.2 Halftone Visual Cryptography

1.1.3 Blue Noise Error Diffusion

1.2 Visual Secret Sharing

1.2.1 Notion and Formal Definitions

1.2.2 Construction of VSS Scheme

1.3 Halftone VSS Construction Using Error Diffusion

1.3.1 Share Structure

1.3.2 Distribution of SIPs and ABPs

1.3.3 Generation of Halftone Shares via Error Diffusion

1.4 Halftone VSS Construction Using Parallel Error Diffusion

1.5 Quality of Halftone Shares

1.6 Discussion

1.6.1 Improvement of Image Quality

1.6.2 Comparison with Other Methods

1.6.3 Image Decoding

1.7 Simulation ...