On nifty2go branch: Domain of signal fields
I think there is an inconsistency in the current nifty2go branch. The WienerFilter and CriticalFilter classes assume the signal field to live in harmonic space whereas the Nonlinear* classes assume it to be in signal space.
What is the reason for having implemented WienerFilterEnergy and Curvature this way? How do we resolve this inconsistency?