[Insight-users] E.g. centrum of marker

[stud ent]

Hi,

I take segmented CT-datas and now I only want to find the centrum of a Part. 
I thought to go through all voxel and calculate:
   
   Sum( vector(x,y,z)*value(x,y,z) ) / Sum( value(x,y,z) )


How can I get the "size" of the volume?  ( maxX, maxY, maxZ )
How can I get the "value" of each voxel? ( value(x,y,z) )
Do you have good examples from vectors?

Thanks
 		
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