Robust lossless watermarking using alpha-trimmed mean and SVM

This paper presents a robust lossless watermarking technique using alpha-trimmed mean and support vector machine (SVM), which is called the RLW method hereafter. It does not damage the contents of original images during watermark embedding, because it uses trained SVMs to memorize the watermark or owner signature and then exploits the trained SVMs to estimate the watermark. Meanwhile, its robustness can be enhanced using alpha-trimmed mean operator against attacks. Experimental results demonstrate that the RLW method not only possesses the robust ability to resist on image-manipulation attacks under consideration but also, in average, is superior to other existing methods being considered in the paper.