With evolution of digital technology, it is challenging to protect personal data from access
without consent. Digital watermarking conceals some information as watermark to protect …

Color image watermarking has achieved great success in various applications such as copy
protection, content authentication, tamper detection and recovery, etc. The present paper …

Robustness, imperceptibility and embedding capacity are the preliminary requirements of
any watermarking technique. However, research concluded that these requirements are …

In this paper, a robust blind watermarking technique, based on block-based DCT coefficient
modification is proposed. The difference between two DCT coefficients of the adjacent …

This paper presents a chaotic encryption-based blind digital image watermarking technique
applicable to both grayscale and color images. Discrete cosine transform (DCT) is used …

This survey presents a brief discussion of different aspects of digital image watermarking.
Included in the present discussion are these general concepts: major characteristics of …

In today's digital era, it is very easy to copy, manipulate and distribute multimedia data over
an open channel. Copyright protection, content authentication, identity theft, and ownership …

Based on quaternion Hadamard transform (QHT) and Schur decomposition, a novel color
image watermarking scheme is presented. To consider the correlation between different …

In this paper, using a new two-dimensional complex map, a secure video watermarking
system is presented. Standard analyzes have been performed to analyze a dynamical …

In this paper, a novel spatial domain color image watermarking technique is proposed to
rapidly and effectively protect the copyright of the color image. First, the direct current (DC) …