Authors: V. Santhi; P. Arulmozhivarman
Addresses: School of Computing Science and Engineering, VIT University, Vellore 632 007, Tamilnadu, India ' School of Electronics Engineering, VIT University, Vellore 632 007, Tamilnadu, India
Abstract: A novel adaptive visible/invisible watermarking scheme for digital images in wavelet domain is proposed in this paper. In this proposed scheme, the scaling factor is calculated adaptively through the parameters obtained from the most prominent region of cover images in wavelet domain. The most prominent region of an image is identified through speeded up robust feature (SURF) technique. The bipolar sigmoid function is used as model to calculate scaling parameter. The value of scaling parameter is adjusted through control parameter which plays a vital role in making the proposed watermarking scheme as either visible or invisible. The proposed methodology is used for preserving ownership rights and it prevents the piracy of digital data which are considered to be the basic needs of security mechanism. As proposed watermarking scheme is carried out in wavelet transform domain it is more robust to image/signal processing attacks. The experimental results and its performance analysis confirm the efficiency of the proposed watermarking scheme.
Keywords: wavelet transform; adaptive watermarking; visible watermarking; bipolar sigmoid function; SURF; invisible watermarking; digital images; data security; ownership rights; data piracy; digital data.
International Journal of Advanced Media and Communication, 2015 Vol.5 No.4, pp.260 - 280
Available online: 06 Jun 2016 *Full-text access for editors Access for subscribers Purchase this article Comment on this article