So, there are a couple of ways you could do that. One is by using structuring elements as indicated in G & W. Another way would be to take a 3D method like described here in the surface approximation section (shameless plug): http://confactsdatas.inrialpes.fr/IEEE_RSJ_-_IROS_2010_International_Confere... and adapt it for 2D. There is nothing in scikits.image that will do this automatically, but it would be a useful feature so I'll add it to my TODO list. Chris On Wed, Apr 20, 2011 at 12:00 PM, jip <jeanpatrick.pommier@gmail.com> wrote:

no, just the convex hull of a a 2D image. I found the definition in "Gonzalez & Woods, p545", but I am not sure to implement the stuff.

jean-patrick