Stylized vector art from 3d models with region support

We describe a rendering system that converts a 3D meshed model into the stylized 2D filled-region vector-art commonly found in clip-art libraries. To properly define filled regions, we analyze and combine accurate but jagged face-normal contours with smooth but inaccurate interpolated vertex normal contours, and construct a new smooth shadow contour that properly surrounds the actual jagged shadow contour. We decompose region definition into geometric and topological components, using machine precision for geometry processing and raster-precision to accelerate topological queries. We extend programmable stylization to simplify, smooth and stylize filled regions. The result renders 10 K-face meshes into custom clip-art in seconds.

@Article { EWHS08a,
  author       = "Eisemann, Elmar and Winnemoeller, Holger and Hart, John C. and Salesin, David",
  title        = "Stylized vector art from 3d models with region support",
  journal      = "Computer Graphics Forum (Proc. of EGSR)",
  number       = "4",
  volume       = "27",
  month        = "June",
  year         = "2008",
  keywords     = "vector graphics, clip art, stylization",
  url          = "http://graphics.tudelft.nl/Publications-new/2008/EWHS08a"
}