Tutorial sobre Snakes:
http://www.cogs.susx.ac.uk/users/davidy/teachvision/vision7.html
Livro Active Contours (A. Blake e M. Isard): http://research.microsoft.com/%7Eablake/contours/
Artigo SAP (Snakes And Ponints): http://www.bmva.ac.uk/bmvc/2004/abstracts/abstract_234.html
Artigo Local Grayvalue Invariants for Image Retrieval, apresentação da equação do detector de Harris e das "Local Jet":
http://www.cs.berkeley.edu/~daf/appsem/Handwriting/papers/schmid_pami97.pdf
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