Graphic Identification System´s Design and Research Based on Graphics Primitive

To resolve the difficulty of reading and identifying the CAD graphics file about automatic distinguishing and judging of CAD graphics file, this paper propses a CAD graphics identification method based on the graphics primitive. In this method, the CAD graphics is exploded to graphics primitive and read the graphics attribute. According to the comparison results of the identified graphics and standard graphics, the graphics primitives are differentiated with their graphics attributs. The graphics identification is finished by reading different sorts of graphics primitives.