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The performance of watermark detection under Compressive Sensing (CS) attack is analyzed in the paper. Watermark is created as a pseudorandom sequence and it is embedded into the DCT image coefficients. CS, as method that provides reconstruction of the signals with small number of samples, is used as watermarking attack. Reconstruction procedure assumes certain number of low frequency DCT coefficients,...
A watermarking procedure in the space/spatial-frequency domain, based on the singular value decomposition is proposed. Singular values are used for selection of pixels suitable for watermarking. Generally, regions for watermarking are characterized as: busy and moderate busy. For pixels from busy regions the entire middle frequency content in the space/spatial frequency domain is used for watermarking...
An application of two-dimensional time-frequency analysis and corresponding two-dimensional eigenvalue decomposition for image watermarking purpose is proposed. The eigenvalue decomposition is used to provide a criterion for watermarking coefficients selection. It is primarily used to select pixels suitable for watermarking that belong to busy image regions. The watermark embedding is performed in...
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