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Digital watermarking technique is used to provide the intellectual property rights. This technique proves the proprietor of the content. The authentication and identification of the ownership protect the data from intruders. The copyright protection protects the multimedia data from modifying, illegal copying and removing the data. The binary image is taken as the watermark, it scrambles first and...
This paper examines means to achieve e-government documents security through the use of digital watermarking techniques. An effective algorithm is proposed such that a given e-government document is watermarked in the frequency domain by applying a second order Discrete Wavelet Transformation (DWT) followed by transformation of the document through matrix decomposition techniques such the Singular...
In this paper, combining with the zero-crossing rate and short-time energy of the audio frame characteristics, an algorithm based on BTC, Arnold and chaos scrambling encryption for seeking the audio frame suitable for the embedded watermark is proposed. And also, the energy is dynamically adjusted to determine the embedding strength so as to self-adaptively embed watermark in the audio frame. Furthermore,...
This paper presents an innovative authentication technique for medical images based on double watermarking technology. The proposed multi transform based watermarkingtechnique utilizes Arnold Transform(AT), Discrete Wavelet Transform (DWT) and Discrete Cosine transform (DCT) leading to an enhanced robust double water marking technique with semi – fragility (RDWTSF) for medical images. The proposed...
Watermarking has been a popular research area inrecent years due to its wide application. In this paper, a briefwatermarking algorithm based on Discrete Wavelet Transform(DWT) and Discrete Fourier Transform (DFT) is proposed. Inthe embedding process, we apply DFT to one of the sub-bandresulting from DWT. We embed the watermark image bydirectly modifying the coefficients of magnitude spectrum orphase...
Invisible digital watermarking is coming to be the most popular technology to protect digital copyright of multimedia data. Schemes based on Discrete Cosine Transform (DCT) are widely used in image or video digital watermarking. In this paper, we proposed a new method that simplify the previous DCT-based methods while more robust to common attacks than conventional methods. We get rid of traditional...
Video Watermarking is a prominent technique used to provide the authentication to the multimedia data such as audio, video and text. It is also used to resolve the copy right protection and ownership problem. The proposed method is used to provide the solution for copy right protection in video data. Here the different mathematical transforms like DWT and SVD are combined for the purpose of achieving...
In the present scenario Digital image watermarking is a powerful method for solving the problems of tamper detection, rightful ownership, copyright protection and content authentication. In this papera secure hybrid digital image watermarking scheme based on Redundant Discrete wavelet transform (RDWT), Discrete Cosine Transform (DCT) and Singular value decomposition (SVD) in zigzag order with Arnold...
In today's world of digital communication, as technology progresses, there is more and more attention required on image security. Many visual cryptography algorithms have been suggested and digital watermarking in association with visual cryptography is also proposed for more image security. An image watermarking model based on progressive visual cryptography is proposed to decide optimal number of...
This paper proposes a local digital image watermarking method based on robust feature extraction. A robust feature extraction method is proposed based on DAISY to extract feature regions. Each feature region is decomposed into approximation and details sub-bands by wavelet transform and the watermark is then embedded into and/or extracted from the approximation coefficients. Spread Transform Dither...
Digital communication facilitates us to transmission of data from transmission station to receiver station. Digital data required different multimedia techniques for transferring and maintaining the quality of digital data. As we know that, digital data are in various formats like text, audio, video, image, graphics, and message or in animated format. During transmission of digital data through channel,...
In this paper we use the Dual Tree Complex Wavelet Transform (DT - CWT) to watermark an image using a binary watermark which is blind in nature. It was observed that when Just Noticeable Difference (JND) of the image is used as a strength multiplier of the watermark while embedding the binary image in the DT - CWT coefficients of the host image, there is a significant improvement in the robustness...
Digital format of data has become very popular now a days with the advancement of technology. But the problem arises when unauthorized copying and distribution of these digital contents took place. As a result the question of copyright protection came. In order to cope with this situation, the era of Digital Watermarking came where the authorized owner hides some kind of information in an imperceptible...
The authenticity of content is crucial factors for solving the problem of copying, distributing and Modifying, the intellectual properties in an illegal way. Watermarking can resolve this problem of above properties. In this paper considering a robust image Watermarking technique by using Nonsub sampled contourlet transform (NSCT) and discrete Cosine transform (DCT). This is called hybrid watermarking...
In this work, we investigate the performance of different color spaces for watermarking purpose using quantization method through experimental analysis. We rely on imperceptibility and robustness as a measure of performance of a given color space and its different channels. Eight different color spaces are used in this work. The watermark is inserted into the LL3 subband for each channel of the color...
This paper introduces a new detector for digital watermarking based on dual-tree complex wavelet transform (DT-CWT). The DT-CWT benefits from the high directionality and shift invariance, which ensure the high efficiency of proposed method. The watermark is additively embedded in the magnitude components of DT-CWT coefficients. Also, the watermark detection is formulated as a binary hypothesis test...
As accessing medical images through web anywhere at any time is in demand, it is essential requirement to interpret and analyze the medical images accurately. The purpose of this paper is to present, digital watermarking technique for modern medical approaches with multiple objective optimization using Firefly algorithm in Discrete Wavelet Transform and Singular Value Decomposition domain with good...
Copyright protection for multimedia data owners is of crucial importance as the duplication of multimedia data has become easily with the advent of Internet and digital multimedia technology. Current digital watermarking techniques for preserving the product ownership are rule-based and not directly deal with the data synchronization, therefore their decoding performance reduces significantly when...
This paper, the robustness of the proposed watermarking algorithm over various attacks (speckle noise, salt & pepper noise, brightness, Gaussian noise, rotation & contrast) is verified. In the proposed embedding, the embedding carries with the wavelet & Singular value decomposition (SVD) transform coefficients of both the images (cover & watermark) & interpolation. Here the SVD...
Telemedicine enables expert diagnosis and better healthcare access to distant patients especially in remote or rural areas by allowing the transmission of medical images through telecommunication. Privacy of data being transmitted and the underlying technologies raise issues related to security. The paper proposes an algorithm for digital watermarking of medical images to ensure secure and confidential...
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