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The digital image watermarking technology is widely used to protect intellectual property and to authenticate digital contents in the network environment. The aim of the paper is to invoke the improved Laplacian Pyramid transform to develop a new image watermarking scheme. Specifically, the host image is decomposed and reconstructed by using the improved Laplacian Pyramid transform. Then, the mid...
At present, due to advancement in communication technology and internet, people are sharing images over social networking and other sites very efficiently but it has created problems regarding copyright protection and authentication of the images. In past 10–15 years, digital watermarking has been becoming a popular solution for these problems. Besides of being popular, it creates distortions in host...
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 has certain defects in the practical application. It cannot effectively solve the problem of the geometric attacks in terms of image and the impact on the QR code fast scanning characteristics. In order to solve the...
A simple and effective audio watermarking algorithm based in time domain is proposed in this paper for controlling the unauthorized distribution of copyright audio. The algorithm makes use of the advantages of both embedding a watermark bit to an individual sample and embedding a bit to a group or frame of samples. Here, a frame of three positive valued samples is used to define the amount of distortion...
This paper proposes a design for data hiding in digital image that robust with both geometric and common signal attacks. In our method, the watermark is embedded into normalized-based moments robust against affine transforms. In our new approach Contourlet will be used to perform embedding and extracting algorithm.
A robust and geometric invariant digital image watermarking scheme based on robust feature points detector and local Zernike transform is proposed in this paper. The robust feature points detector is proposed based on SIFT algorithm to extract circular patches. A local Zernike moments-based watermarking scheme is raised. Each extracted circular patch is decomposed into a collection of binary patches...
A novel image watermarking algorithm is developed which is based on Contourlet Transform (CT) and Matrix Factorization methods such as Singular Value Decomposition (SVD) technique and QR factorization method. In the proposed scheme, the original image and the watermark image are transformed into subbands by Contourlet Transform. The lowest frequency coefficients of the CT decomposed original image...
Digital watermarking, the technology of embedding special information into multimedia data, is a topic that has recently gained increasing attention all over the world. The watermark of digital images, audio, video, and other media products in general has been proposed for resolving copyright ownership and verifying the integrity of content. The paper first introduced the definition and basic framework...
Through the in-depth analysis of the basic principles and existing research results of digital watermarking, drawing on the existing theory of the asymptotic grid, this paper presents a 2D vector graphics watermarking algorithm based on foundational contour. This algorithm by reducing the changes of the main body information and removing the extracted foundational contour in the transform domain embeds...
In this paper,we introduce a robust image watermarking method based on Hilbert-Huang Transform against geometric distortion. This watermarking is detected by a linear frequency change. The Hilbert-Huang transformation is used to detect the watermark. The chirp signals are used as watermarks and this type of signals is resistant to all stationary filtering methods and exhibits geometrical symmetry...
Digital watermarking algorithms are prune to different attacks. Of these geometric attacks are recognized as one of the strongest attacks for digital watermarking technology. In this paper, we implemented a BNA(Blind Normalization Algorithm) watermarking algorithm resistant to geometrical distortions (rotation, scaling and aspect ratio)and different other attacks(histogram equalization, JPEG, noise)...
We present a novel blind digital watermarking algorithm using the quantization for Jaguwen rubbing image based on Contourlet transform in this paper. After Contourlet transform, original image is decomposed into a series of multiscale, local and directional subimages. Select the low frequency subband as the watermarking embedding domain. At the same time, the original binary watermark is firstly scrambled...
In this paper, a robust image watermarking method in two-dimensional space/spatial-frequency distributions domain is proposed which is robust against geometric distortion. This watermarking is detected by a linear frequency change. The chirp let transformation is used to detect the watermark. The chirp signals are used as watermarks and this type of signals is resistant to all stationary filtering...
In order to improve the robustness of the watermarking algorithm, a dual-watermarking method is proposed based on Contourlet and SVD (Singular Value Decomposition). The method adopts different methods to insert watermark into the low frequency and high frequency of the host image respectively. We make full use of the advantages of the Contourlet transform, that is a flexible multiresolution, local,...
Digital audio watermarking is considered as an efficient way to copyright protection. A robust algorithm was proposed based on chaos theory and quantization in comlex cepstrum domain. Parameter selection is a key and unmanageable problem. In the proposed method, embedded positions and parameters (including threshold value and step length) were given. And it is helpful for improving robustness and...
In this paper, we proposed a new algorithm for digital audio watermarking process using Empirical Mode Decomposition (EMD) and Hilbert Transform (HT). The host audio signal is decomposed into several Intrinsic Mode Functions (IMFs). A set of -1 and 1, which is obtained by mapping from standard normal distributed pseudo random numbers, is embedded as secret information into the IMF containing highest...
We present a blind digital watermarking algorithm using the module arithmetic and odd-even quantization based on Contourlet transform in this paper. After Contourlet transform, original image is decomposed into a series of multiscale, local and directional subimages. Select the low frequency sub-band as the watermarking embedding domain and then make module arithmetic. At the same time, the original...
RST invarian watermarking scheme is proposed in this paper based on the SIFT feature points and improved pseudo-Zernike moment. Firstly, feature points are detected using SIFT, and some suitable points are selected to form localized feature regions which are scaled to a standard sized. After computing these regions by the improved pseudo-Zernike moments of these regions , the digital watermark are...
In this paper, we introduce a robust image watermarking method based on bi-dimensional empirical mode decomposition (BEMD) against geometric distortion. Based on the characteristics of the image theory and human visual system, the proposed method makes use of orthogonal properties of empirical mode decomposition to achieve the BEMD transform on the image. The image is decomposed into a series of IMFs...
The paper proposed a complex cepstrum domain fragile audio watermarking algorithm based on quant-ization, by analyzing the effect of complex cepstrum direct current coefficient's change to time domain audio signal. Quantized length of the algorithm was calculated by the expression of signal-to-noise ratio. According to audio auditory quality requirements, it needn't experiments again and again to...
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