Many different steganographic methods have been proposed during the last few years; most
of them can be seen as substitution systems. Such methods try to substitute redundant parts …

Multimedia security has become a major research topic, yielding numerous academic
papers in addition to many watermarking-related companies. In this emerging area, there …

In many printer and publishing applications, it is desirable to embed data in halftone images.
We proposed some novel data hiding methods for halftone images. For the situation in …

Covering classical cryptography, modern cryptography, and steganography, this volume
details how data can be kept secure and private. Each topic is presented and explained by …

With the proliferation of digital media such as images, audio, and video, robust digital
watermarking and data hiding techniques are needed for copyright protection, copy control …

The present invention is a method and apparatus for watermarking text or vector graphics
documents. It is based on character-wise or vector graphics element-wise grayscale or color …

We propose a novel method called DHSED (data hiding stochastic error diffusion) to hide
binary visual patterns in two error diffused halftone images. While one halftone image is only …

A framework to jointly halftone and watermark a grayscale images is presented. The
framework needs the definition of three components: a human visual system (HVS)-based …

We present a new framework for data hiding in images printed with clustered dot halftones.
Our application scenario, like other hardcopy embedding methods, encounters fundamental …

This chapter introduces some new trends and challenges in the research and application of
digital watermarking for printed materials. It discusses the new digital watermarking …