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OVERVIEW APPLICATIONS INTERACTIVE APPLETS HISTORY OF THE METHODS/FLOW CHART PUBLICATIONS EDUCATIONAL MATERIAL ACKNOWLEDGEMENTS ABOUT THE AUTHOR/CV Copyright: 1996, 1999, 2006 J.A. Sethian 
The Narrow Band Level Set Method
The central idea of
level set methods
is to track a propagating interface by embedding it as the zero
level set of a higherdimensional function.
This implicit representation allows one to track changes in
topology, and allows one to calculate geometric quantities such as
the normal direction and the curvature by capitalizing on the
smoothness of the level set function in a neighborhood of th
zero level set of interest.
However, this embedding comes at a substantial price; one is now
tracking all the level sets, not just the one of
interest.

