[Insight-users] SignedDanielssonDistanceMapImageFilter and ContourExtractor2DImageFilter

[David Doria]

In this example:
http://www.itk.org/Wiki/ITK/Examples/WishList/LevelSets/SignedDanielssonDistanceMapImageFilter

I have created a binary image of the outline of a square, and then
attempted to extract the 0 level set, which I would expect to be the
same square outline.

The distance map looks correct, however, there seem to be 37 contours extracted:

Contour 0 has 43 points.
Contour 1 has 3 points.
...
Contour 36 has 3 points.
Contour 37 has 42 points.

Can anyone explain how I would get it to extract just the contour that
is expected?

Thanks,

David