Abstract: As a graphics branch corresponding to photorealistic graphics, in recent years, the non-photorcalistic became a research hot in computer graphics, which has got more and more attention. The research productions have been applied to computer animations, computer art, science information iconograph rendering and etc. This paper summarized the non-photorealistic rendering technology. Firstly, the paper introduced development of non-photorcalistic rendering, then used simulation of the effect of different art as a clue, classified the non-photorealistic rendering technology, and there were some analysis and discussion on the characteristic, development and leading arithmetic of each technology, meanwhile,we expected the future development of NPR.

Key words: Non-photorcalistic rendering, Painting, Rendering style, Image, Texture