[Insight-users] watershedImageFilter parameters for 3D CT images

[Gator Philly]

Hello itk gurus,

In order to effectively use watershedImageFilter, how to optimize those two
parameters: Level and Threshold?
If I have a multiple set of 3D CT images, each set of 3D CT images might
have different voxel intensity characteristics,
it seems from my experiments that one set of parameters for all sets might
not the optimal solution. How can I
choose the parameters based on the characteristics of given set?

The other question I have is should I do some denoising pre-processing such
as median filter before I do watershed?

Thanks a lot for any suggestions and comments.
Best,
Gator
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