[Insight-users] About the levelset value

[Brady McCary]

Wei-Dong,

This is because the filter you are using is based on a sparse field
implementation, and only positions ``close'' to the zero level set are
updated. Usually the zero level set is sufficient. If you need a
distance transform from the zero level set, pass the output of the
segmentation to ThresholdImageFilter to make inside pixels have value
one and outside pixels have value 0, and then pass this output to a
signed-distance filter, like SignedDanielssonDistanceMapImageFilter.

Brady

On Thu, Feb 26, 2009 at 3:08 AM, Wei-Dong Lian <weidong.lian at gmail.com> wrote:
> Hello everyone,
>
> I am employing ThresholdSegmentationLevelSetImageFilter to do the image
> segmentation. The image is just a circle in the image. The shape of the
> level set value should be a cone, but I found it seemed this shape was cut
> by two planes, see the attachment. It seemed that itk limit the minimum and
> the maximum level set value in ThresholdSegmentationLevelSetImageFilter.
> Can anyone give me some suggestions, I will appreciate that.
>
> Weidong
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