Content-based Hierarchical Authentication Watermarking Algorithm Based on Image Quad-tree Decomposition

摘要

This paper analyzed the manners of content-based image authentication and methods of tamper location. A dual-watermarking algorithm was designed for hierarchical authentication on the base of image quadtree decomposition. Experiments carried on the testing images show that the method can resist common image processes and achieve the detection and location function on the precondition of holding the visual quality of image.