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Signal Processing
A public verifiable copy protection technique for still images
Journal of Systems and Software
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Hidden digital watermarks in images
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IEEE Transactions on Image Processing
Combined techniques of singular value decomposition and vector quantization for image coding
IEEE Transactions on Image Processing
Modified patchwork-based watermarking scheme for satellite imagery
Signal Processing
Attack on a semi-blind watermarking scheme based on singular value decomposition
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A hybrid DWT-SVD copyright protection scheme based on k-means clustering and visual cryptography
Computer Standards & Interfaces
Robust image watermarking using local Zernike moments
Journal of Visual Communication and Image Representation
A novel CRT-based watermarking technique for authentication of multimedia contents
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A semi-blind watermarking based on discrete wavelet transform
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A robust associative watermarking technique based on vector quantization
Digital Signal Processing
A novel DCT domain CRT-based watermarking scheme for image authentication surviving JPEG compression
Digital Signal Processing
A new robust watermarking scheme to increase image security
EURASIP Journal on Advances in Signal Processing
An improved SVD-based watermarking technique for copyright protection
Expert Systems with Applications: An International Journal
A new algorithm of gray watermark embedding
ICAT'06 Proceedings of the 16th international conference on Advances in Artificial Reality and Tele-Existence
A new digital image watermarking scheme based on Schur decomposition
Multimedia Tools and Applications
Robust copyright protection scheme for digital images using overlapping DCT and SVD
Applied Soft Computing
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This paper presents a robust watermarking approach for hiding grayscale watermarks into digital images. Plugging the codebook concept into the singular value decomposition (SVD), the proposed method embeds the singular values (SVs) of the original image into the watermark one to attain the lossless objective. The experimental results show that the proposed scheme guarantees the extracted watermark on an average and the worst PSNR values of 24.91 and 19.96 dB, respectively. In addition to the guarantee of the quality of extracted watermark image, the security of the referenced watermark is further strengthened by applying chaos permutation on it in advance. The proposed scheme leads to satisfactory robustness to various attacks and is compared to other well-known grayscale watermarking methods to reveal its efficiency for practical applications.