Digital color image watermarking by means of blind source separation

Digital watermarking is a promising technique to help protect data security and intellectual property rights. In a digital watermarking scheme, it is not convenient to carry the original image all the time in order to detect the owner´s signature from the watermarked image. Moreover, for those applications that require different watermark for different copies, it is preferred to utilize some kind of watermark independent algorithm in extraction (does not need a priori knowledge of the watermark). In this paper we present a new hybrid watermarking scheme based on independent component analysis and the RGB decomposition. We present a novel strategic invisible approach for insertion-extraction of a digital watermark a color image, into color images. The novelty of our scheme makes use of Blind Source Separation model by manipulating the least significant levels of the blue channel so as not to bring about a perceptible change in the marked image.