Hierarchical Watermarking Framework Based on Analysis of Local Complexity Variations

by   Majid Mohrekesh, et al.

Increasing production and exchange of multimedia content has increased the need for better protection of copyright by means of watermarking. Different methods have been proposed to satisfy the tradeoff between imperceptibility and robustness as two important characteristics in watermarking while maintaining proper data-embedding capacity. Many watermarking methods use image independent set of parameters. Different images possess different potentials for robust and transparent hosting of watermark data. To overcome this deficiency, in this paper we have proposed a new hierarchical adaptive watermarking framework. At the higher level of hierarchy, complexity of an image is ranked in comparison with complexities of images of a dataset. For a typical dataset of images, the statistical distribution of block complexities is found. At the lower level of the hierarchy, for a single cover image that is to be watermarked, complexities of blocks can be found. Local complexity variation (LCV) among a block and its neighbors is used to adaptively control the watermark strength factor of each block. Such local complexity analysis creates an adaptive embedding scheme, which results in higher transparency by reducing blockiness effects. This two level hierarchy has enabled our method to take advantage of all image blocks to elevate the embedding capacity while preserving imperceptibility. For testing the effectiveness of the proposed framework, contourlet transform (CT) in conjunction with discrete cosine transform (DCT) is used to embed pseudo-random binary sequences as watermark. Experimental results show that the proposed framework elevates the performance the watermarking routine in terms of both robustness and transparency.


page 1

page 3

page 4

page 5

page 8


Robust Wavelet-Based Watermarking Using Dynamic Strength Factor

In unsecured network environments, ownership protection of digital conte...

Adaptive Blind Image Watermarking Using Fuzzy Inference System Based on Human Visual Perception

Development of digital content has increased the necessity of copyright ...

Hardware Implementation of Adaptive Watermarking Based on Local Spatial Disorder Analysis

With the increasing use of the internet and the ease of exchange of mult...

Adaptive Steganography Based on bargain Game

The capacity and security of the confidential message on the channel are...

Adaptive Control of Embedding Strength in Image Watermarking using Neural Networks

Digital image watermarking has been widely used in different application...

An adaptive algorithm for embedding information into compressed JPEG images using the QIM method

The widespread use of JPEG images makes them good covers for secret mess...

Contributions to interframe coding

Advanced motion models (4 or 6 parameters) are needed for a good represe...

Please sign up or login with your details

Forgot password? Click here to reset