Hi,

I try to use shapeworks to build a SSM of femurs.

I had to convert femurs meshes to binary images (I did this using itk)

I then use the binary images as data in shapeworks studio.

All run fine until the fastmarching step. In this step, the underlying itk filter (itk::LevelSetNeighborhoodExtractor) crashes on the first image (I try to select another 1^st image to check that the problem was not caused by the image itself).

The issue is raised from line “inputPixel = m_InputLevelSet->GetPixel(neighIndex);” from file “Modules\Segmentation\LevelSets\include\itkLevelSetNeighborhoodExtractor.hxx” (I’m using itk-4.10.0) because neighIndex[1] is negative.

So I’d like to know

1)      if the structure of interest should be filled in with ‘foreground’ pixel or only the edges of the structure should have the ‘foreground’ value

2)      what if a good ‘foreground value’. Should I prefer 255 or 1 ?

Thanks

Vincent

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Vincent Daanen

Software Project Manager - MinMaxMedical

+33 (0) 4 76 54 95 18
bureaux: http://www.biopolis.fr/