A Content-Based Semi-Fragile Mesh Watermarking Scheme

Abstract

A semi-fragile watermarking scheme based on vertex geometry is presented for 3D model authentication. Watermark is generated from 3D model and random number generator by a seed number. To embed and extract watermark, it only needs the seed number with some simple arithmetic operations. Our method is robust to general 3D model processes, such as uniform scaling, translation, and vertex reordering. The watermark embedding has little impact to the original 3D models that PSNR values can be up to nineties. Thus the proposed method is very suitable for precision instruments or medical science models. Experiments also demonstrate that the method is time and performance satisfactory.