Abstract: Non-Photorealistic Rendering ( referred to as NPR) technology is a popular research field incomputer graphics in recent years, it usually involves the digital simulation of various stylized drawing ed-ges . In this paper, the generation method of an optimized stylized edge is proposed, the edge owns ab-stract linear feature and can simulate engraved edges. The paper improves the smooth model of the EdgeTangent Flow ( referred to as ETF) , which generates the abstract linear flow consisting of strong edge in.formation. The stylized edge generated by the abstract linear flow also owns the abstract linear character-istic ,and it is made up of strong edge information.

Key words: non-photorealistic rendering, stylized rendering, stylized edge, ETF ( Edge Tangent Flow)