We introduce a morphological approach to curve evolution. The
differential operators used in the standard PDE snake models can be
approached using morphological operations on a binary level set. By
combining the morphological operators associated to the PDE
components we achieve a new snakes evolution algorithm. This new
solution is based on numerical methods which are very simple,
fast and stable. Moreover, since the level set is just a binary piecewise
constant function, this approach does not require to estimate a
contour distance function. To illustrate the results obtained
we present some numerical experiments on real images.