Stylized line drawing and shading effects for cartoon rendering

Due to increasing demands of cartoon style in many areas of computer graphic aspects, this paper presents a simple stylized shading technique to enhance the cartoonish appearance in two aspects. First, a new toon-illumination model is developed to emphasize the boundaries between diffuse reflection part and specular reflection part in the phong illumination model. the new discrete shading will be exploited to convey the light and dark orientations on the surface of 3d model. second, we combine stylized lines with non-photorealistic shading effect to convey more visual cues of tone. the experimental result reveals the ability of proposed model to produce many cartoon effects

Interactive non-photorealistic rendering

Due to increasing demands of artistic style with Interactive Rate, we propose this review paper as a starting point for any person interested in researching of interactive non-photorealistic rendering. As a simple yet effective means of visual communication, interactive non-photorealistic rendering generates images that are closer to human-drawn than are created by traditional computer graphics techniques with more expressing meaningful visual information. This paper presents taxonomy of interactive non-photorealistic rendering techniques which developed over the past two decades, structured according to the design characteristics and behavior of each technique. Also, it covers the most important algorithms in interactive stylized shade and line drawing, and separately discussing their advantages and disadvantages. The review then concludes with a discussion of the main issues and technical challenges for Interactive Non-Photorealistic Rendering techniques. In addition, this paper discusses the effect of modified phong shading model in order to create toon shading appearance