Digital Watermarking Algorithms for Vector Images

While watermarking algorithms have been developed for many types of digital content, little work has been done to develop watermarking algorithms for 2D or 3D CAD vector images. This paper presents three blind watermarking methods that can embed several bits binary data into a vector image without changing its appearance. Preliminary experiments were conducted, which compared performance of different algorithms. Experimental results illustrate that these algorithms might be applied to detect or verify the ownership of a vector image, especially a 2D or 3D CAD image.