Proceedings ArticleDOI
Robust Watermarking Scheme Based on Multiresolution Fractional Fourier Transform
B. Gaurav,R. Balasubramanian +1 more
- pp 1-8
TLDR
A new robust watermarking scheme is proposed in multiresolution fractional Fourier transform domain using singular value decomposition and is able to withstand a variety of attacks.Abstract:
In this paper, a new robust watermarking scheme is proposed in multiresolution fractional Fourier transform domain using singular value decomposition The watermark is embedded in the high frequency sub-band of the host image at coarsest level Although the schemes based on SVD are robust but fail under ambiguity attacks In this attack, both the owner and attacker can extract their watermark from the watermarked image To prevent ambiguity, the normalized mass matrix is formed and embedded in the host image In extraction, normalized mass matrix is extracted first and compared with original one If the similarity is found then the singular values are extracted to construct the watermark Experimental evaluation demonstrates that the proposed scheme is able to withstand a variety of attacksread more
Citations
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Patent
Procede d'insertion d'une marque numerique dans une image, et procede correspondant de detection d'une marque numerique dans une image a analyser
TL;DR: In this article, a procede dinsertion, par un dispositif d'insertion of a marque numerique dans an image, comprenant les etapes suivantes, is proposed.
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Method for inserting a digital mark into an image, and corresponding method for detecting a digital mark in an image to be analysed
TL;DR: In this paper, a method for inserting a digital mark into an image, via an insertion device, comprising the following steps: application of a Fourier transform to said image, producing a two-dimensional Fourier spectrum; insertion of said mark into said Fourier Spectrum, produced a modified FourierSpectrum; application of an inverse Fourier Transform (IFT) transform (IFT) to produce a watermarked image.
References
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Journal ArticleDOI
Secure spread spectrum watermarking for multimedia
TL;DR: It is argued that insertion of a watermark under this regime makes the watermark robust to signal processing operations and common geometric transformations provided that the original image is available and that it can be successfully registered against the transformed watermarked image.
Journal ArticleDOI
The fractional Fourier transform and time-frequency representations
TL;DR: The authors briefly introduce the functional Fourier transform and a number of its properties and present some new results: the interpretation as a rotation in the time-frequency plane, and the FRFT's relationships with time- frequencies such as the Wigner distribution, the ambiguity function, the short-time Fouriertransform and the spectrogram.
Book
The Fractional Fourier Transform: with Applications in Optics and Signal Processing
TL;DR: The fractional Fourier transform (FFT) as discussed by the authors has been used in a variety of applications, such as matching filtering, detection, and pattern recognition, as well as signal recovery.
Journal ArticleDOI
An SVD-based watermarking scheme for protecting rightful ownership
Ruizhen Liu,Tieniu Tan +1 more
TL;DR: A novel watermarking algorithm based on singular value decomposition (SVD) is proposed and results show that the newwatermarking method performs well in both security and robustness.
Journal ArticleDOI
A DCT-domain system for robust image watermarking
TL;DR: A new watermarking algorithm is presented: the method, which operates in the frequency domain, embeds a pseudo-random sequence of real numbers in a selected set of DCT coefficients, which is adapted to the image by exploiting the masking characteristics of the human visual system, thus ensuring the watermark invisibility.
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