Schur decomposition based robust watermarking algorithm in contourlet domain

Abstract

Most of the existing watermarking schemes utilized SVD decomposition to embed watermark, which lead to a high computational complexity and incidental the false positive detection problem. Therefore, this paper provides a robust copyright protection scheme based on a simple decomposition scheme (schur decomposition) and Quantization Index Modulation (QIM) in Contourlet domain. In addition, some stable features are acquired by using schur decomposition in the Contourlet domain. Consequently, the watermark is embedded into those stable features with QIM method. Experimental results show that the proposed scheme has some superiorities in terms of robustness and imperceptibility, which could against most common attacks such as JPEG compression, filtering, cropping, noise adding and so on.