A New Stereo Image Watermarking Method for 3D Media

AbstractA new stereo image watermarking method for three dimensional media, based on the concept of smooth and nonsmooth blocks relationship is proposed. The features of smooth and non-smooth are distinguished by the alternative current coefficients energies in discrete cosine transform domain. The relationship is built on the features of blocks at the some position on the both images of stereo pair, and the corresponding watermark is embedded into the relationship. Moreover, parity quantization is designed for watermark embedding when the relationship can not work. Insert into direct current coefficients using quantization. Experimental results show that the proposed method can embed watermarks into stereo images invisibly and detected them blindly. At same time, the proposed method is robust to attacks, such as JPEG compression, filter, cropping, and so on