Implement a linecut of the modulus in postprocessing

[carnisj]

Description

I added one step in post-processing, where line cuts through the reconstructed modulus are generated in Z, Y, X, and the gradient of the line cuts is fitted with a Gaussian line shape to estimate the resolution.

Fixes #195

Type of change

• New feature (non-breaking change which adds functionality)

How has this been tested?

I added unit tests and ran the example dataset.

Checklist:

• I have made corresponding changes to the documentation
• I have added corresponding unit tests
• I have run doit and all tasks have passed

[clatlan]

Nice ! Is this how the pixel size is derived by default ?

[carnisj]

Nice ! Is this how the pixel size is derived by default ?

No, this is unrelated. The voxel sizes are chosen by the user beforehand because they are required for the interpolation into an orthonormal grid. The linecut and fits are done on this already interpolated object to get an idea about the resolution of the reconstruction. They take as well the user-defined voxel sizes to convert from a pixel number to a length scale in nm.