Following an underlying theme in Communication is the duo of Dirty Paper Writing and Watermarking. In 1983 utilising some previous results by Gelfand, Pinsker, El Gamal and Heegard, Costa gave a method for acheiving capacity in the presence of a known interference. Costa, in his paper, doesn’t mention about any applications of his result, let alone Watermarking. In 1999 Cox et al recognised the...

In this paper, we propose a Copyright Protection (CP) watermarking scheme, which is a robust, blind, and reversible watermarking scheme; aimed at protecting the copyright of color images against geometrical attacks. It is a development of an already existing watermarking scheme. Watermark embedding in this scheme, as well as in its counterpart, mainly depends on the permutation of the histogram...

This paper presents a scheme for estimating two-band amplitude scale attack within a quantization-based watermarking context. Quantization-based watermarking schemes comprise a class of watermarking schemes that achieves the channel capacity in terms of additive noise attacks. Unfortunately, Quantization-based watermarking schemes are not robust against Linear Time Invariant (LTI) filtering att...

An information-theoretic model for image watermarking and data hiding is presented in this paper. Previous theoretical results are used to characterize the fundamental capacity limits of image watermarking and data-hiding systems. Capacity is determined by the statistical model used for the host image, by the distortion constraints on the data hider and the attacker, and by the information avai...

The objective of the paper is to analyse the advantages and disadvantages of spatial, DFT, DCT and DWT domains and highlight the advantages offered by watermarking wavelet coefficients rather than the DCT or FFT coefficients. The reasons for the DWT advantage are analysed and the choice of a particular wavelet basis is explained. As an illustration of these advantages, the paper presents a high...

The information technology plays a vital role during the rapid growth of using information systems comprising relational data. Also, the relational information is important in many areas such as medical, military, forensics and stock market, where data should be distributed to users from a centralized database. The relational databases which is used in shared environment for extracting the info...