Image Watermarking is the Process of Embedding an Imperceptible Data (Watermark) Into Cover Image
Keywords:
DWT, Digital Water Mark, Perceptivity, Image, DCT-Domain, SVD, Data EmbeddingAbstract
Image watermarking schemes are used to protect the digital images. Image watermarking is the process of embedding an imperceptible data (watermark) into cover image. The image watermarking schemes have been widely used to solve the copyright protection problems of digital image related to illegal usage or distribution. Several image watermarking schemes are proposed, considering different view points. The image Watermarking schemes are classified into different types based on domain of processing, visibility of watermark and rigidity of scheme. Not very many watermarking plans have been proposed for characterizing the copyrights of shading picture. To resolve the copyright protection problem of color image, we propose an effective, robust and imperceptible colorimage watermarking scheme. This plan implants the watermark into cover picture in (Red, Green, Blue) RGB space. The combination of Discrete Wavelet Transformation (DWT) and Singular Value Decomposition (SVD) of Blue channel is used to embed the watermark. The singular values of different subband coefficients of Blue channel are modified using different scaling factors to embed the singular values of the watermark. The copy of the watermark is embedded into four subbandcoefficients which are very difficult to remove or destroy. The combination of DWT and SVD increases the security, robustness and imperceptibility of the scheme.
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