A Robust Image Watermarking Scheme in Wavelet Domain via Singular Value Decomposition

Digital image watermarking is the process of authenticating a digital image by embedding awatermarkinto it and thereby protecting the image from copyright infringement. Thispaper proposes a novel robust imagewatermarking scheme developed in the waveletdomain based on the singular value decomposition (SVD).The host image istransformed into wavelet domain by applyingwavelet transform, subsequently the lowfrequency sub-band of wavelet transformed image issegmented into non-overlappingblocks. The watermark bits are embedded into the blocks by modifying thefirstcolumn coefficients of the left singular vector matrix of SVD decomposition withthe help of a threshold. Experimental results, compared with the related existingschemes, demonstrated that theproposed scheme not only possesses the strongrobustness against image manipulation attacks, but also, iscomparable to otherschemes in term of visual quality.

Keywords:

Watermarking , Robust , Wavelet Domain , Singular Value decomposition