Uniform Selection of Vertices for Watermark Embedding in 3-D Polygon Mesh Using IEEE754 Floating Point Representation

摘要

In the proposed watermarking scheme, watermark is embedded by re-positioning some selected vertices. The selection of vertices for watermark embedding is based on the IEEE754 floating point representation of vertex normal of selected vertices. The selected vertices are re-positioned by displacing ? component of (?,T,ø) spherical coordinate of vertices. The watermark information is embedded uniformly throughout the surface of cover mesh object. The watermarking schemes are designed to protect data by maintaining the quality of watermark object. The proposed algorithm is also evaluated against both distortion and distortion less attacks.