ABSTRACT
Nowadays, CAD graphics are playing an important role in manufacturing, architecture and electrical fields. Most of these graphics are of great worth, because it usually contains special design in it. However, they can be easily duplicated and reused by others, when translated via internet. Robust watermarking can be used to verify the ownership, and receives a lot of attention. Most algorithms focus on applications of watermarking in traditional media such as images, audios, videos and texts. Recently, people have realized the importance of vector graphics, such as vector map and CAD graphic.
