[Insight-users] How to pass initial segmentation result to ShapeDetectionLevelSetFilter?

[Sandarak]

Hello Zachary!

Thank your for info. It was very helpful for me.


Regards

Michal


> If the output from the region growing filter is a binary "mask" type
> image where inside is one intensity value and outside is a second 
> intensity value, you could use either of the signed distance map filter
> classes to generate a signed distance map. This places the 
> inside/outside boundary at the zero-level set of the map, and is thus
> valid input for a level set filter.

> The SignedDanielssonDistanceMapImageFilter class generates exact 
> distance maps, and requires that the outside be of intensity zero. The
> ApproximateSignedDistanceMapImageFilter generates more approximate (but
> faster) distance maps, and allows for arbitrary intensities to be set
> for the input's inside and outside.

> I believe that there are other ways to initialize a level set filter
> from a binary mask input which others on this list can comment on and
> compare to the methods I proposed above, but I do know that these will
> work to get you started.

> Zach Pincus


> Department of Biochemistry and Program in Biomedical Informatics
> Stanford University School of Medicine




> On Jun 11, 2005, at 12:15 PM, Sandarak wrote:

>> Hello!
>>
>> I would like to set as initial input to ShapeDetectionLevelSet filter
>> output from RegiongGrowing filter. How could I achieve this?
>>
>> Setting as initail input output from FastMarching filter is easy and is
>> explained in itkSoftwareGuide. But I can't find any examples how to do
>> this with region growing, because ShapeDetection filter requires
>> distance map as input, and I have no idea how to create it from region
>> growing filter output.
>>
>> Thanks in advance
>>
>> Michal Postrozny
>>
>>
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