I would like to use the node Feature Calculator (beta) to compute the surface area of 3D objects. I only obtain results in pixel units. Most importantly the Z calibration is not taken into account making the computation of the surface impossible.
I use Geometric Features 3D. For the volume it is written that it is in pixel units. Is this the same also for the surface area and other features?
I did a few tests and it seems that the metadata is not considered. I tried to set it manually with “Set Image metadata” node but this had no effect on the computed features.
Please find attached a workbook with the different examples. As example I use a sphere of radius 10 in an image of 100x100x100 (calibration 1,1,1) or an image with less Z-slices 100x100x50 (calibration 1,1,2).
as I replied myself it may be that my post is ignored. I am shamelessly refer to you. I will have a look into the code to see if the calibration is included at all in the computation of the surface area.
Hi Stefan,
could you add a note that for the 3D computations all dimension units are in pixels? It is there for the volume but not the surface. May be a generic warning?
