[Insight-users] Question about ThresholdLevelSet

[Lorenzo Cesario]

Hi, i have a trouble about setting two parameters in threshold level set.
1) how can i choose parameter InitialDistance for seed point? i understand
that this point is inside the distance map surface so in itk segmentation
example it has negative value and iso-surface has zero distance (the
contour). But how can i choose one value instead of another? for example...i
can set seed value at -500, or -100 or -1000, what can help me to make a
choice instead of another?

2) How can i set LowerThreshold of the binary thresholder? UpperThreshold is
zero because it represents the contour, but all the value in object have
negative value. Why in example of itk lower is -1000?

tks to all