Rendering Complexity in Computer-Generated Pen-and-Ink Illustrations
Author(s): Brett Wilson, Kwan-Liu Ma.
Proceedings: 3rd International Symposium on Non-Photorealistic Animation and Rendering (NPAR'04), pp. 129--137,
2004.
[BibTeX] 
Abstract:
We present a method to aid in the generation of pen-and-ink style
renderings of complex geometry. Most illustration algorithms focus
on rendering a small number of surfaces with as much detail
and expression as possible. These methods break down when the
scene is composed of many small, overlapping details that are not
individually resolvable. We propose a hybrid 2D/3D pipeline that
incorporates image processing with the full scene geometry to extract
regions which may require special handling. For silhouette
renderings, grayscale value is matched to a sample rendering while
preserving important edges and texture. For hatched areas, the approximate
surface properties of each logical region is represented.
The result is an image that is more clear for informative purposes,
and more artistic for aesthetic purposes.