Blind Watermarking for Copyright Protection of 3D CAD Drawing

As of late, interest in digital image web and web 3D techniques is growing; in consequence a watermarking research that protect to copyright of 3D graphic model has been processing. Currently there is much research being done in developing a watermarking technique for graphic data; however, watermarking technique based on CAD drawing leaves something to be desired. This paper proposes a digital watermarking technique for 3D design drawing using Line and 3DFACE based on vertex in CAD system to prevent infringement of copyright from unlawfulness reproductions and distribution. By experimental result, we confirmed robustness and invisibility of embedded watermarks in several conversions of 3D CAD drawing.