A robust and blind watermarking scheme on wavelet domain against geometric attacks

Geometric attacks become a serious threat to most existing wavelet-based watermarking by destroying the synchronization between watermark and watermarked images. This paper presents a novel robust watermarking scheme against geometrical distortions. Using invariant centroid (IC) and a feature template in DFT domain, the synchronization can be reconstructed. The double-channel watermarking is embedded into low-frequency band in DWT domain. Experimental results prove that our watermarking scheme has good invisibility and excellent robustness against both,normal attacks and geometric attacks; furthermore, this method is blind watermarking.