The rapid development of digital devices and the increasing demand for copyright protection
and leakage tracing of documents result in new demands for robust text watermarking. It …

This paper improves the use of text color modulation (TCM) as a reliable text document data
hiding method. Using TCM, the characters in a document have their color components …

Digital watermarking technology is an effective method for copyright protection of digital
information, such as images, documents, etc. In this paper, we propose a high capacity text …

提出了一种用于二值文本图像的数字水印算法. 该方法首先对文本图像进行字符切分,
然后在乘性变换模型的假设之下, 通过翻转字符图像的边界像素点来实现水印嵌入. 同时 …

This chapter explains the main image analysis approaches used to verify document integrity
in the context of printable and scanable documents. Printing and scanning documents …

High signal to noise separation has been a long standing goal in the signal detection
community. High in the sense of being able to separate, by orders of magnitude, a signal (s) …

This paper proposes the use of higher order statistical moments in document image
processing to improve the performance of systems which transmit side information through …

This book discusses techniques to convey side information over a printed media. Those
techniques will be referred to as hardcopy communication techniques. The information is …

This paper presents a data hiding technique for printed bicolor documents. It inserts tiny
dots, hardly noticeable at normal reading distance, to embed the message. For message …

The process of adding high-density information onto printed material enables and improves
interesting hardcopy document applications, such as: security, authentication, physical …