[Insight-users] Fast marching to calculate distance map

[siqi chen]

Hi, ITKers,

I have a simple question regarding how to use FastMarchingImageFilter to
calculate distance map.

If I have a pointset P with integer coordinates, and I want to calculate a
distance map to P. What should I pass to FastMarchingImageFilter?

What I did is:
1. pass P to AlivePoints with value 0.0,
2. pass all the 4 neighbors of P to TrialPoints with value 1.0
3. set the speedconstant to 1.0
4. set the outputregion, size, origin, ....

Am I missing something?

Thank you very much
Siqi
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