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Geometric distortion is known as one of the most difficult attacks to resist, for it can desynchronize the location of the watermark and hence causes incorrect watermark detection. It is a challenging work to design a robust color image watermarking scheme against geometric distortions. Based on the Support Vector Regression (SVR) and Pyramidal Dual-Tree Directional Filter Bank (PDTDFB), a new color image watermarking algorithm against geometric distortion is proposed. Experimental results show that the proposed scheme is not only invisible and robust against common image processing operations such as median filtering, noise adding, and JPEG compression etc., but also robust against the geometrical distortions and combined attacks.

A Novel Pyramidal Dual-Tree Directional Filter Bank Domain Color Image Watermarking Algorithm