I have a two maps (let’s call them map A and B) where I have preferred orientation issues. The issue is more severe in map A vs map B, which is evident from the map itself. Using orientation diagnostics, I get a cFAR score of 0.05 (map A) and 0.08 (map B). Although the scores are similar, map B certainly looks better than map A. That is reflected in the SCF values of 0.709 (map A) and 0.922 (map B).
So, my question is can I use the SCF values while comparing the preferred orientation of both the maps? Thank you in advance for your assistance!
We have a section in our Orientation Diagnostics job guide about the differences between cFAR and SCF. In short, they can both be useful measures (cFAR accounts for ‘signal’ anisotropy via conical FSCs whereas SCF looks solely at Fourier space sampling), so you can definitely consider the differences in SCF as salient. Neither is a replacement for actually inspecting your density, which it sounds like you have done here.
One final note: we have seen a number of reconstructions where the cFAR scores are quite low (<0.1) despite the density itself looking to be quite good, and missing the common indicators of preferred orientation (streaks, anisotropic noise etc). We’re still investigating the exact cause of this (NB., we have never seen the converse) but from the sounds of it, map B might be one of these cases.