The vector-based hidden Markov model (HMM) is a powerful statistical model for
characterizing the distribution of the wavelet coefficients, since it is capable of capturing the …

In recent years, digital image watermarking has been emerged as a promising solution for
copyright protection and authentication problem of digital images. Among several existing …

In this paper, a robust hybrid watermarking method based on discrete wavelet transform
(DWT), discrete cosine transform (DCT), and scale-invariant feature transformation (SIFT) is …

In this paper, we first propose a new blind image watermarking scheme robust to geometric
attacks and compressions. The scheme is based on contourlet transform (CT) and principal …

Currently, the problems of digital copyright have become increasingly prominent. However,
digital watermark technology is the new technology in the field of copyright protection. And it …

With the growth of digital networks such as the Internet, digital media have been explosively
developed in e-commerce and online services. This causes problems such as illegal copy …

Watermarking has attracted much attention in last decade due to its application in copyright
protection of digital multimedia. In this paper, a blind watermarking scheme in the wavelet …

With advance of technology, manipulation and distribution of digital media such as image,
audio and video has been widespread explosively. This causes problems like unauthorized …

This paper presents a new image watermarking method in Contourlet domain,‎ where
watermark is embedded through quantum chaotic map‎ in the selected Contourlet …

Video watermarking is a technique that used to protect the multimedia data, video in
reference to authentication, proof of ownership, copy control etc. In this paper a robust video …