An Efficient Image Watermarking Technique Based on IWT-DCT-SVD

Confidentiality of multimedia data such as image must be protected from illicit users. Thus, a novel image watermarking technique using Integer Wavelet Transform (IWT), Discrete Cosine Transform (DCT), and Singular Value Decomposition (SVD) is proposed in this paper. LL (low-low) subband is selected after applying one-level IWT on host image, which is further processed with DCT. Embedding of watermark is performed directly into Singular Values (SVs) of transformed image. Robustness of proposed technique is comprehensively determined under various set of attacks such as scaling and histogram equalization. The comparative study is also done among proposed technique and other prevailing techniques and experimental results clearly indicate effectiveness of this proposed method.