title: Paraview: Calculate the surfae area of a3D object
body: <p>I want to calculate the surface area of a 3D body (binarized: 1=inside, 0=outside so it's "voxelated") using Paraview. I found the filter "integrate variable" that gives me a value and it's reasonable. But I want to know what's the algorithm implemented into Paraview to compute it! It's an open-source software so everything should be open but I cannot find the reference.
  Any idea?</p>