1992
Feature-Based Image Metamorphosis
http://www.cs.princeton.edu/courses/archive/fall00/cs426/papers/beier92.pdf 

1997
(NEW)Orientable Textures for Image-Based Pen-and-Ink Illustration
http://www.sci.utah.edu/~kpotter/library/npr/salisbury_1997.html


1998

Subdivision Surface in Animation
http://pages.cpsc.ucalgary.ca/~samavati/cpsc589/papers/derose98.pdf 

Computer-Generated Floral Ornament
http://grail.cs.washington.edu/pub/papers/Wong98.pdf

A Non-Photorealistic Lighting Model For Automatic Technical Illustration
http://webhome.csc.uvic.ca/~agooch/SIG98/gooch98.pdf

(NEW)Painterly Rendering with Curved Brush Strokes of Multiple Sizes
http://www.mrl.nyu.edu/publications/painterly98/

2001
Expressive Expression Mapping with Ratio Images
http://research.microsoft.com/~zliu/expression.pdf

A simple and Efficient Error-Diffusion Algorithm
http://www.iro.umontreal.ca/~ostrom/publications/pdf/SIGGRAPH01_varcoeffED.pdf

2006
(NEW)X-Toon: An extended toon shader
http://artis.inrialpes.fr/Publications/2006/BTM06a/

(NEW)Hybrid Images
http://cvcl.mit.edu/publications/publications.html