Introduction - If you have any usage issues, please Google them yourself
The paradigm of the level
set is that i s a numeri-cal method for tracking the
evolution of contours and
surfaces. Instead of ma-nipulating the contour di-rectly, the contour is embed-ded as the zero level set of a higher dimensional function called the level-set function,ψ(X,t). The level-set func-tion is then evolved under the control of a differential
equation. At any time, the
evolving contour can be ob-tained by extracting the zero
level-set Γ((X),t) ={ψ(X,t) =0}from the output. The main advantages of using level sets is that arbitrarily complex shapes can be modeled and topological changes such as merging and splitting are handled implicitly.