[Insight-users] logical combinations of label maps and number of label voxel

[Corinna Vehlow]

Hello,

I want to compare different segmentation results and calculate diverse  
quantities like Dice-Coefficient or Jaccard-Coefficient, which are  
calculated via logical combinations of sets (AND or OR) and the number  
pixels within a set. I already found itk filters to compute the  
logical and- or or-combination of two sets. The questions is, are  
there any efficient implementations for counting the labeled voxels  
within a binary file, i.e. that give the percentage or number of  
foreground pixel? Otherwise I have to go through the whole 3D data set  
via using loops, which is not very effective.
It would be great, if anybody could help.

Thanks
Corinna

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