Watermarking Techniques in Curvelet Domain

This paper proposes four different methods for embedding and extraction of the watermark into the cover image based on Curvelet Transform Technique. Magic Square Technique was used in the algorithms for spreading the watermark and embedding into the curvatures of original image. The Curvelet transform is a type of the Wavelet transform technique designed to represent images in sparse mode consisting of all objects having curvature information taken in higher resolution even for lower resolution content. The experiments indicated that these algorithms embedded the watermark efficiently such that the images have possessed robust watermark on extraction after the image compression like JPEG, GIF, scaling, rotation and noise attacks.