Image watermarking is a well known technique for copyright protection. This paper presents a review of the recently proposed watermarking techniques; and classifies the techniques based on different domains in which data is embedded. We have also analyzed the techniques in terms of their complexity, robustness and processing time. Finally a conclusion is drawn by classifying the techniques according to best suitable area of application according to their properties and requirements.
Watermarking, image transforms, DCT, DWT
