Robust and Imperceptible Multiple Watermarking Using Transform Domain Algorithm for Digital Media

Abstract

AbstractThis paper discussed a novel robust multiple watermarking method with three transform domain techniques, discrete wavelet transforms (DWT), discrete cosine transforms (DCT) and singular value decomposition (SVD) for color images. For security reasons, secret media is inserted into same multimedia items to offers an additional level of security and to achieve two important performance metrices of watermarking. Firstly, the original media (image) is disintegrated into first level DWT and generate DWT coefficients then select the lower frequency sub-band for applying DCT then SVD. The secret image is also altered by DCT decomposition then SVD transformation is applied on DCT coefficients in embedding process. Then after, a watermarked image is produced by applying converse of all transform domain SVD then DCT and DWT. The secret media can be extracted with recovery algorithm. This procedure has been generously tried and evaluated against various attacks of watermarking and it is found that it achieves better robustness and imperceptibility.KeywordsDigital image watermarkingDiscrete wavelet transforms (DWTs)Discrete cosine transforms (DCT)Singular value decomposition (SVD)Robustness