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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...
The World Wide Web is, in many respects, a world without barriers. Its openness is highly appealing, if not downright noble. Unfortunately people can take advantage of this electronic latitude to unlawfully take what is not theirs. Efforts aimed at protecting intellectual property are limited to crop up gateways that show lengthy legal documents establish ownership; it does not provide enforcement...
In order to solve the copyright issues brought by the distributed rendering system for three-dimensional model, we present this blind watermarking algorithm with high transparency and robustness. In the generation step, we compressed the original watermark information using the UGM model of gray system, for reducing the amount of information embedded in watermark. In the embedding step, we replace...
Image watermarking can be distinguished between methods that hide information by adding and multiplying. In some applications, not the more information embedding is, the more performance is especially for multi copyright protection. In this paper, robustness performance of these two watermarking methods are compared with the same conditions, including original image, watermark signal, fidelity, detection...
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...
GIS vector data is widely used in economic construction, social life, management decision, military affairs, et al. The application of GIS vector data faces some unsolved issues such as digital copyright protecting, data authenticating, and data source tracing, etc. These issues could be obstacles restricting the further usage of digital vector data. The illegally forged, distributed or tampered data...
Digital image watermarking is frequently used for many purposes, such as image authentication, fingerprinting, copyright protection, and tamper proofing. Imperceptibility and robustness are the watermark requirements of good watermarks. In this paper, we propose the Fast Walsh Hadamard transform (FWHT) combined with the Discrete Cosine Transform (DCT) as a new image watermarking scheme. The FWHT reorders...
Many illegal copies of digital video productions for cinema release can be found on the Internet before their official release. During the illegal copying of cinema footage, composite geometric distortions commonly occur due to the angle of the camcorder relative to the screen. We propose a novel video watermarking based on spread spectrum way that satisfies the requirements for protecting digital...
Due to the rapid development of Internet, digital multimedia data are frequently transported on the Internet. Hence, how to protect important data from being stolen or modified has become an important issue. Digital watermarking can protect digital rights by embedding owner watermarks into the digital data, so the owner can declaim his ownership and intellectual property. In this paper, we propose...
In this paper a simple and robust Contourlet-based image watermarking technique for copyright protection is presented. The main idea is to utilize the flexible representation of images provided by the Contourlet transform in designing a robust watermarking technique. The watermark is embedded into different bands to resist different kinds of signal processing attacks without causing visual artifacts...
In this paper, we propose a blind watermark detection scheme which is robust against composite geometric distortions. The composite geometric distortions mean that an image or a video is rotated, perspective-projected, and resized at the same time. It commonly happens during capturing a movie in a theater by a camcorder illegally. Local auto-correlation function (LACF) with a novel estimation model...
This paper address issues that arise in copyright protection systems of digital images, which employ blind watermark verification structures in the curvelet domain. First, we observe that statistical distribution with heavy algebraic tails, such as the alpha-stable family, are in many cases more accurate modeling tools for the curvelet coefficients than families with exponential tails such as generalized...
A novel watermarking technique based on iamge features and neural network is proposed. The watermark is the fusion of a binary copyright symbol and image feature label which is gotten by analyzing the image fractal dimension. Then the watermark is pretreated by Arnold transform in order to increase the security, and embedded into the multiwavelet transform domain. At the same time, the back propagation...
This paper proposes a pyramid-wavelet watermarking scheme for ownership verification of digital color images. The discrete wavelet transform (DWT) has been used extensively in recent years in watermarking systems. It provides the necessary perceptual invisibility and robustness. In this paper, a pre-DWT process is implemented using optimal pyramid transform (OPT), where one of the error images that...
Watermarking techniques are proposed as a solution to copyright protection of digital media files. Watermarking algorithms are mainly concentrated on spatial or spectral domains. In this work, a robust and high capacity watermarking method that is based on spatio-frequency (SF) representations is presented. We use the discrete evolutionary transform (DET) to represent an image in the SF domain. A...
This paper proposes an novel multipurpose digital watermarking algorithm in morphological wavelet transform domain for two purposes: to notify the copyright owner with a visible gray image watermark and to protect the copyright with an invisible binary image watermark. Both watermarks are embedded in different blocks with different methods. The experiment results indicate that the morphological wavelet...
A novel watermark algorithm is proposed for copyright protection of JPEG2000 compressed cultural heritage images in digital museum system. Visually meaningful color logo is encoded as the watermark information. Due to its characteristics, the key problem is to decide how to hide as many bits information as possible into the image while ensuring the information can be retrieved correctly, even after...
Recently, much interest is being taken to protect the copyright of digital data and prevent illegal duplication of it. Towards this purpose, this paper presents a robust and flexible blind watermarking system suitable for proving ownership claims for 3D models. The basic idea is to decompose the original model into a series of details at different scales by using particular basis functions derived...
In this paper a simplified robust wavelet packet based image watermarking technique for copyright protection is presented. The main idea is to utilize the decomposition performed by the wavelet packet transform in embedding a robust watermark into the host image and choosing the best location for the embedding without causing visual degradation in the image. Experimental results show that the proposed...
Watermarking techniques are used as a solution to copyright protection of digital media files. In this work, a new and robust watermarking method that is based on spatio-frequency (SF) representations is presented. We use the discrete evolutionary transform calculated by the Gabor expansion to represent an image in the SF domain. A watermark is embedded onto selected cells in the joint SF domain....
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