frequency domain watermark embedding
A Secured Approach for Watermark Embedding using Key based Gödelization Technique under Spatial and Frequency Domains
... the Watermark in Spatial Domain involves a very low computational complexity with a high visual quality of the ...at embedding secret watermark image with a low distortion, while the payload ...
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Embedding Watermark in Wavelet Domain Using Chaotic Sequence
... spatial domain to frequency domain and employs chaotic sequence to spread the watermark over wavelet ...original watermark image to original image ...
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A Robust DCT based Digital Image Watermarking using Random Mid band Coefficient Exchange Scheme for Gray Scale Images
... This paper presents a scheme for image watermarking based on random selection of 2 middle-band coefficients of DCT domain. Moreover, sequence of 4 bit is mapped in to unique sequence of 8 bits. This provides ...
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Review of Digital Watermarking Techniques
... in frequency domain and digital watermarking techniques like DCT, DWT, SVD, DCT-SVD, DWT-SVD, their advantages, disadvantages and ...Both embedding and extraction of watermark is being done ...
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A Visible Watermarking Scheme for Digital Images in Frequency Domain
... overcome watermark removal and unauthorized insertion ...a watermark generation scheme based on the histogram of the image and applied it to the original image in the transform(DCT) ...spatial domain ...
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Block based Adaptive Image Watermarking Scheme using Visual Perception Model in DCT Domain
... spatial domain and transform domain methods. Spatial domain techniques embed the watermark by directly modifying the intensity, color, or values of the pixels ...transform domain ...
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Embedding and Extracting Digital Watermark Based on DCT Algorithm
... The watermark information is trapped in the low frequency coefficient, which is sensitive to the human eye, which will cause a significant drop in the quality of the carrier image; embedding the high ...
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Hybrid Data Hiding Scheme in Images using DWT DCT and SVD
... the watermark in to the host image. Watermark embedding into the component of spatial-domain of the host image is a straightforward ...spatial- domain methods are not good in ...
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SECURE DYNAMIC SYSTEM DEVELOPMENT METHOD (SDSDM): A SURVEY ABOUT ITS SUITABILITY
... The watermark is embedded in optimal selected frequency bands of the ...watermarked frequency domain to reconstruct the watermarked video ...the watermark is embedded in 3D DFT ...
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Visible Image Watermarking Based On Texture and Luminance Blocks In DCT Domain – A Review
... embed watermark in carrier signal [3, ...the watermark less perceptible to the human ...the embedding domain of watermark, digital watermarking algorithm can be divided into two ...
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Nested Digital Image Watermarking Technique Using Blowfish Encryption Algorithm
... In 2005, Rehab H. Alwan, Fadhil J. Kadhim, and Ahmad T. Al- Taani explained a method consisting of three steps. First, the edge of the image is detected using Sobel mask filters. Second, the least significant bit LSB ...
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OFF LINE SIGNATURE VERIFICATION SYSTEM BASED ON DWT AND COMMON FEATURES EXTRACTION
... In the experiment, the selected 3D geometric model is shown as Figure 1(a), the model has 6457 vertexes and 12946 surfaces. In the experiment, the data size of 3D model is all 3D-Studio (3ds). According to the previous ...
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An Efficient Watermarking Technique Using Genetic Algorithm for Relational Data Sreesha K S 1, Jincy Easow2 , Prof. Jisha P Abraham 3
... hide watermark, whereas the database object is a collection of independent objects, called ...The watermark has to be embedded into these tuples, (ii) Out-of-Order Relational Data: The relative ...
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PDE based scheme for multi-modal medical image watermarking
... the watermark removal before the diagnosis, and (2) it assumes a secured environment because, once the water- mark is removed, the image is not protected anymore ...
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Implementation of a Modified LSB Algorithm Based on Pixel Value Differencing for Image Watermarking
... data. Embedding a watermark image onto a host image directly by manipulating the pixel values is branched out to be the spatial domain technique which includes Least Significant Bit (LSB) ...
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Non-blind watermarking Scheme for Colour Images using Discrete Wavelet Transforms and Singular Value Decomposition
... The Discrete Wavelet Transform of an image divides the image into bands of approximately equal bandwidth on a logarithmic scale. This is similar to the retina of the human eye that splits the image into several ...
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A Contourlet-Based Image Watermarking Scheme with High Resistance to Removal and Geometrical Attacks
... the watermark is embedded into the highest frequency subbands, it is likely to be spread out into all subbands when we reconstruct the watermarked image, due to the special transform structure of laplacian ...
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Robust database watermaking technique over numerical data
... encoded watermark is to be very "strong" one can easily alter the whole database data aggressively, but at the same time almost certainly also destroy its real ...applied watermark is unavoidably ...
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Digital Image Watermarking using Combined DWT and DFRFT
... For the proposed method, its performance is shown for embedding the watermark data in different high frequency sub-bands and their combinations of transformed image.. Following observati[r] ...
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Volume 3, Issue 4, April 2014 Page 105
... (b) Discrete Cosine Transform (DCT): In DCT method, the image is first transformed to frequency domain and then separated into spectral sub-bands. The spectral sub-bands are classified as High and Low ...
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