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With the development of the Internet, authentication and copyright protection of digital products becomes an important issue. In this paper, a zero-watermarking algorithm based on audio content is proposed, which can stand against synchronization attacks. The audio signal is divided into several segments according to the size of watermarking image. After that, SVD transform is performed for each matrix...
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...
Digital watermarking is a technique used to embed an extra piece of information into multimedia signals. Aiming at content-based audio retrieval applications, a robust audio watermarking scheme resist to low bits rates compression is proposed. The performance of proposed algorithm is analysis by common signal processing such as Mp3 compression, Real compression, filtering, amplitude compression, equalization,...
This paper describes a method against geometric distortion of digital watermarking image by means of Hausdorff distance measuring, which matches the feature points, and calculates similarity between two point sets (maximum distance). In this paper, Harris feature points are firstly extracted into feature point set according to the response of the Harris detector and the field size, and then secondly...
This paper proposes a robust zero-watermarking algorithm based on Complex Zernike moment to resist various signal processing operations and geometric transformations. Zero watermarking algorithm changes the operation method of embedding watermark in the original data. Instead, it employs the significant characteristics of the original data to construct watermarking information to successfully avoid...
Generally, feature-based image watermarking uses the local image features present in an image. The invariance of the features is exploited for achieving robustness against attacks, but the leakage of information is often unconsidered. Here an image adaptive watermarking approach is proposed which uses invariant feature regions for enhancing the robustness and security. Feature regions are determined...
Content authentication of text document has become a major concern in the current digital era. In this paper, a zero-watermark algorithm is proposed for Chinese text documents content authentication. Firstly, the frequencies of different part-of-speech (POS) tags are obtained through natural language processing technology. And they are used to calculate the expect value and entropy, which can be as...
The main objective of developing an image watermarking technique is to satisfy both imperceptibility and robustness requirements. To achieve this objective, a hybrid image watermarking scheme based on discrete wavelet transform and singular value decomposition is proposed in this paper. In our approach, the edge information of an image is used to embed the watermark. In addition, we apply the particle...
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...
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...
A novel digital watermark against RST distortion based on SURF is proposed. The algorithm is the second watermark, SURF is fast than SIFT, so that the algorithm is faster, and the ability against RST is nearly the same with feature based SIFT. The watermark algorithm use odd-even detector properly to avoid the distortion procedure when watermark is embedded.
In this paper, a novel bipolar time-spread (TS) echo hiding based watermarking method is proposed for stereo audio signals, to overcome the low robustness problem in the traditional TS echo hiding method. At the embedding, echo signals with opposite polarities are added to both channels of the host audio signal. This improves the imperceptibility of the watermarking scheme, since added watermarks...
This paper presents an anti-geometric attacks algorithm of color image watermarking based on scale-invariant feature transformation. Firstly, detecting SIFT feature points in the red component of true color image and filter out the feature points information; Then three level wavelet transform is performed on the blue and green component of the color image and extract the low-frequency component coefficient...
Presents an effective against geometric attack robustness of digital watermarking algorithm based on improved SIFT(Scale Invariant Feature Transform). The proposal achieves watermark synchronization using improved Scale-Invariant Feature Transform; Some suitable feature points are selected to form circular patches of the carrier image. The circular patches are divided into sectors, and watermark is...
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...
This paper proposes an audio watermark embedding and extraction algorithm based on fast Fourier transform (FFT). This algorithm makes full use of human auditory system (HAS) characteristic, embeds watermarking information into the phase coefficient of audio signal after FFT. The experimental results show that the audio watermarking generated with the proposed algorithm are inaudible and robust characteristics...
In this paper, a new audio watermarking algorithm is proposed to accomplish both copyright protection and content authentication with localization. Compared to the conventional algorithms, the feature of the proposed algorithm is that only an encrypted watermark is embedded in the approximate wavelet coefficients based on the instantaneous mixing model of the independent component analysis (ICA) system...
Robust hash measure the similarity between two images by matching their short hash vectors. For its advantages of efficiency and versatility, robust hash has become a promising technology in image authentication and identification. Different to the traditional watermarking method, robust hash does not need to embed information into the host image. Therefore, it is promising to provide more robustness...
An image hashing provides a compact representation of an image that can be used for authenticating that image. This paper presents a new approach for generating an image hashing that is resilient to content-preserving modifications and at the same time, is capable of detecting malicious tampering. The invariant features are extracted via DWT and Radon transform followed by log mapping and then Fourier...
Combined with audio features and the advantage of discrete multiwavelet transform (DMT) in signal processing, a novel audio watermarking scheme is proposed in this paper. Due to the high relevance between adjacent audio frames, the watermark embedding and detection are based on the energy relationship of two consecutive frames in multiwavelet domain. To enhance the robustness and auditory quality,...
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