With the rapid development of computer science, problems with digital products piracy and
copyright dispute become more serious; therefore, it is an urgent task to find solutions for …

In this paper, a new robust digital image watermarking algorithm based on Joint DWT-DCT
Transformation is proposed. A binary watermarked logo is scrambled by Arnold cat map and …

Digital images can be easily copied or manipulated by irresponsible persons. The right
property needs to be secured and protected from illegal copies and piracy. Digital …

The technology of image watermark is very important in the field of signal processing. The
knowledge of image watermark, as well as the DCT/IDCT had been introduced in this paper …

In recent years, digital watermarking techniques have been proposed to protect the
copyright of multimedia data. Different watermarking schemes have been suggested for …

In this paper, we present a robust hybrid watermarking method applied to color images for
authentication, which presents robustness against several distortions. Due to the different …

With the widespread use of color images in many areas, the colorful logo or mark is
gradually used as watermark to protect the copyright in recent years. Since the color image …

Recently, piracy and copyright violations of digital content have become major concerns as
computer science has advanced. In order to prevent unauthorized usage of content, digital …

This paper presents a novel watermarking method based on fractal theory. In the proposed
method, information is embedded into binary document images. First, host image is coded …

Image watermarking technique aims at high imperceptibility of the embedded watermark
with minimal distortion in the watermarked images. In frequency-domain, block-based …