[vmtk-users] vesselness filtering parameters

[ddwilde <dav...@ug...>]

Hi VMTK users,

I used the VMTK-plugin in Slicer4 to get a frangi vesselness filtered 
image of an angiografic CT image of a mouse dataset (with good results). 
However when I try to apply the same filter in VMTK directly (with the 
same parameters), I get different results. There appears to be a lot 
more background noise. Is the definition of the parameters different 
between both methods or am I doing something wrong?

Thanks,
David

Used parameters:
Slicer: Tube<-> Plates: 0.3 // Blobs <-> Tubes: 500 // Contrast: 150 // 
minimum Diameter: 1[vx] // maximum Diameter: 5[vx]
VMTK: alpha: 0.3                //          beta: 500           // 
gamma: 150  //  sigmamin: 0.05 [mm]      //  sigmamax : 0.25 [mm] // 
sigmasteps: 5
VMTKcommand: vmtkimagevesselenhancement  -ifile CT.nii -ofile vessel.nii 
-method frangi -sigmamin 0.05 -sigmamax 0.25 -sigmasteps 5 -alpha 0.3 
-beta 500 -gamma 150

the image resolution is 0.05 mm