[Insight-users] Problem with Fast marching minimal path extraction

[Dan Mueller]

Hi Maria,

Can you please provide some more information?

Which synthetic image are you using? Where are you placing the seed point?

I would not expect that every seed point will work -- the seed point
needs to be in a region which is reachable by the Fast Marching
expanding front. For example, placing the seed point in a region with
low speed (near 0.0) will not work.

Attached are a few examples using different seed points.

Regards, Dan

On 5 July 2011 17:23, Maria Alejandra Zuluaga Valencia
<mariazulv at yahoo.es> wrote:
> Hi,
> I am trying to use the minimal path extraction algorithm reported in:
> http://hdl.handle.net/1926/1332
> After some minor compilation errors I managed to make it work. However, I
> found the behavior is a bit weird. As an example:
> if I test with one of the Synthetic images provided and the path points
> given, everything works fine. But, as soon as I change one of the path end
> points it stops working. By stop working I mean that the extracted path
> contains no points. I've tried with several examples and it is always the
> case.
>
> As far as I know, no matter how bad I place my end point, I should get a
> minimal path connecting the end and start points. Has any one had the same
> kind of problem? did you managed to fix it?
> thanks,
> Maria
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