Hough Indexing support more than two phases?

[Erlendos12]

Hi, was wondering whether the ebsd_index.index_pats used in Hough indexing supports more than two phases? When I try to pass in three phases, only two are indexed.

The phaselist I pass into the indexer:

The phaselist that is attatched to the cystal map:

[hakonanes]

Hi Erlend,

the phaselist parameter in index_pats() only accepts ["FCC"], ["BCC"] or ["FCC", "BCC"] at the moment, as detailed in the function description in the PyEBSDIndex docs. So, in the case of two FCC phases (Austenite, Si) and one BCC phase (Ferrite), PyEBSDIndex is currently not able to distinguish between the two FCC phases.

I'm currently working on several improvements to the indexing/refinement workflow, where we will be able to refine only parts of a dataset using a navigation_mask parameter in the EBSD.refine_*() methods. This will allow the following workflow for this case:

1. Hough indexing with FCC and BCC
2. Make three refinement runs: one of the BCC points with a Ferrite master pattern, one of the FCC points with an Austenite master pattern, and one of the FCC points with an Si master pattern.
3. Merge the refined maps into a multi-phase map based on the highest normalized cross-correlation score

I hope to realize this workflow within the years end.

When you say you pass in an orix.crystal_map.PhaseList, I assume you mean in a notebook where the FCC/BCC strings are extracted later in notebook? Because passing a PhaseList to index_pats() shouldn't work.