Hybrid Color Image Watermarking Algorithm Based on DSWT-DCT-SVD and Arnold Transform

With emergence of new technologies it is now easier to communicate through multimedia like image, audio, video and text. But at the same time the problem of unauthorized access and copyright protection has also emerged. In order to handle these problems digital image watermarking is one of the best technique. In this paper we present an optimized color image watermarking technique to protect an image data from any unauthorized access. The technique presented in the paper uses a combination of Discrete Stationary Wavelet Transform (DSWT), Singular Value Decomposition (SVD), Discrete Cosine Transform (DCT) and Arnold Transform. In this technique we hide a color image watermark into a colored cover image without hampering the perceptibility of the cover image. Peak-signal-to-noise-ratio (PSNR) and Normalized Correlation (NC) are used to analyze the proposed watermarking technique for the imperceptibility and robustness measures.