Line-art illustration of dynamic and specular surfaces
2008; Association for Computing Machinery; Volume: 27; Issue: 5 Linguagem: Inglês
10.1145/1409060.1409109
ISSN1557-7368
AutoresYong-Jin Kim, Jingyi Yu, Xuan Yu, Seungyong Lee,
Tópico(s)Advanced Vision and Imaging
ResumoLine-art illustrations are effective tools for conveying shapes and shading of complex objects. We present a set of new algorithms to render line-art illustrations of dynamic and specular (reflective and refractive) surfaces. We first introduce a real-time principal direction estimation algorithm to determine the line stroke directions on dynamic opaque objects using neighboring normal ray triplets. To render reflections or refractions in a line-art style, we develop a stroke direction propagation algorithm by using multi-perspective projections to propagate the stroke directions from the nearby opaque objects onto specular surfaces. Finally, we present an image-space stroke mapping method to draw line strokes using the computed or propagated stroke directions. We implement these algorithms using a GPU and demonstrate real-time illustrations of scenes with dynamic and specular 3D models in line-art styles.
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