Parity Modulation Based Watermarking Resisting to Cropping

In this paper, we proposed a parity modulation based digital image watermarking scheme in DWT domain, focusing on resisting cropping attack. The watermark embedded the LI₃, subband coefficients of DWT by the parity modulation method. Experimental results show that the proposed watermarking method can resist not only cropping attack, but also some common signal processing attacks, such as JPEG compression, Gaussian noise, and filtering etc.