Biometric Authentication for Copyright Protection Using Watermarking Technichines

In this paper, the authors proposes a feature-based robust digital image watermarking algorithm is proposed to achieve the goal of image authentication and protection simultaneously. The first step is to identify the feature key areas for embedding. The Hessian-Affine feature detector and Gillie's key detector are used for this purpose. In the next step, the copyright watermark is embedded into these regions and the authentication watermark is embedded in the remaining regions by using a block-wise fragile watermarking technique. Both the algorithms prove that they are efficient in terms of watermark embedding and extraction and can resist various image processing and geometric attacks.