A Watermarking Scheme of CAD Design Drawing Based on Line, Arc, and Polygon Face Components for Copyright Protection

저작권 보호를 위한 선, 호 및 다각형면 성분 기반의 CAD 설계도면의 워터마킹 기법

  • 문광석 (부경대학교 전자공학과) ;
  • 이석환 (동명대학교 정보보호학과) ;
  • 권성근 (삼성전자 무선사업부) ;
  • 권기룡 (부경대학교 전자컴퓨터정보통신공학부)
  • Published : 2007.05.30


This paper proposes a watermarking scheme for 3D CAD design drawing. In the proposed scheme, we embed binary watermarks into line, arc, and polygon face components that are the basic component of 3D CAD design drawing. The embedding target component can be selected randomly among three components or by the component distribution in drawing. In line components, a watermark bit is embedded into the ratio of the length of a target line and an average length of lines that are connected into a target line. Furthermore, a watermark bit is embedded into a curvature radius on the basis of a center point in a arc component and also is embedded into a ratio of two sides in a polygonal face component. Experimental results verified that the proposed watermarking has the robustness against Format conversion, rotation translation, scaling, cropping, and layer cutting and also SNR of watermarked component is about 39.89-42.50 dB.