Links
Here are a few links and paper which we found useful while creating the software:
Image Processing
NPR
Georges Winkenbach and David H. Salesin, "Computer-Generated Pen-and-Ink Illustration," In SIGGRAPH '94 Conference Proceedings, pp. 91-100, ACM SIGGRAPH, July 1994.
http://userpages.umbc.edu/~cwang3/English/Fall00/CMSC691A/paper.htm
Michael P. Salisbury, Michael T. Wong, John F. Hughes, and David H. Salesin, "Orientable Textures for Image-Based Pen-and-Ink Illustration," In SIGGRAPH '97 Conference Proceedings, pp. 401-406, August 1997.
http://drawsketch.about.com/cs/mechanicalaids/a/grid_drawing.htm
Amy Gooch, Bruce Gooch, Peter Shirley, and Elaine Cohen, "A Non-Photorealistic Lighting Model For Automatic Technical Illustration," In SIGGRAPH '98 Conference Proceedings, 1998.
Ramesh Raskar and Michael Cohen, "Image Precision Silhouette Edges", Symposium on Interactive 3D Graphics, Atlanta GA, April 1999.
Arthur Appel, F. James Rohlf, and Arthur J. Stein. The haloed line effect for hidden line elimination. Proceedings of SIGGRAPH Õ79 (Chicago, Illinois, August 8-10, 1979. In Computer Graphics 13, 2 (August 1979), 151Ð157.
Rendering in Pen and Ink. Arthur Leighton Guptill.
Golden Ratio
Caricatures
Caricature and face recognition Robert Mauro In Memory & Cognition,
Exaggeration of Facial Features in Caricaturing. Wan Chi Lou, Pin Chou Liu and
Computer Caricature Susan Brennan May 2003
An Introduction to Active Shape Models Tim Cootes In Image Processing and Analysis, Ed.R. Baldock J. Graham, Oxford University Press, 2000, Pages 223-248
A Neural Network for Facial Feature Location Paul Debevec 1992
A Two-Stage Approach to Automatic Face Alignment Tong Wang, Haizhou AI
Neural Network-Based Face Detection Henry A.Rowley, Shumeet Baluja
In Pattern Analysis and Machine Intelligence, January 1998, Pages 23-38