Blind source separation based digital image adaptive watermarking
S. Jadhav, A. S. Bhalchandra · 2009
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 watermarkindependent algorithm in extraction. This paper presents a digital color still image watermarking scheme using Blind Source Separation (BSS) to embed the watermark by manipulating the least significant levels of the blue channel of the host color image so as not to bring about a perceptible change in the marked image. The novelty of our scheme lies in determining the mixing matrix for BSS model, based on energy content of the image. This makes our method image adaptive to embed color image into color images. Meanwhile the performance analysis of two BSS/ICA (Independent Component Analysis) algorithms are introduced in extraction procedure, through which the watermark can be derived efficiently. The proposed method, undergoing different experiments, has shown its robustness against many attacks. (6 pages)