[Insight-users] threshold parameter in watersehd segmentation

[Juliette Deniau]

Hi all, 
Could any one explain me the meaning of the threshold parameter in watersehdImageFilter?
I've read the SoftwareGuide and I've understand that this parameter is used to generate the initial segmentation via the steepest descent stategy.  its used to remove shallow background regions....but I couldn't understand its a threshold of what? 
Thank you
Juliette



      
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