Synchronisation correction‐based colour image watermarking using proximal classifier with consistency and multivariate generalised Gaussian model

Abstract

In this Letter, a novel synchronisation correction-based colour image watermarking approach is proposed to resist geometric distortions. The Cb channel of the YCbCr colour host image is first decomposed by a two-level contourlet transform, and binary watermark image is embedded into the host image by modifying the lowpass coefficients. Then the multivariate generalised Gaussian distribution is used to capture the significant features of colour images, and the proximal classifier with consistency is employed to estimate geometric distortion parameters. Finally, the watermark image is extracted from the corrected watermarked image. Simulation results demonstrate that the presented approach shows excellent robustness against various common image processing attacks and geometric attacks while guaranteeing invisibility.