Phillip

Hi @onatlandsmyr, this sounds like an excellent start. My only thought is that in general you will always want to flatten 2D images at some stage (for speed reasons)

As a plug and play template matching option, rank refinement seems like an excellent candidate: https://doi.org/10.1107/S0108767312007234

Hi @uellue, I'm probably not the correct person for this, but from a historical perspective pyxem has a mib reader simply because we needed one at some point, and once...

I agree broadly with the top answer on the linked SO question. `Warnings` for client should consider doing something (including deprecations), logging for developers (we) should do something.

> The benefit of MTEX' approach is that the two reference frames are always aligned. I'm slightly in favour of a1 for this reason. Could you expand on what this...

> I was a bit unclear here. In MTEX, the sample and Euler reference frames are the same ([doc](https://mtex-toolbox.github.io/EBSDReferenceFrame.html)). I realise that (q1) didn't include discussions of the latter. That...

> [1] and [3] both seem to suggest the same orthonormal reference frame, namely: `e1 = a1 / a`, `e2 = e3 x e1`, `e3 = a3* / c*`. Happy...

Okay, going to go away and have a think before trying to start the next phase.

> One might define an intermediate cartesian coordinate system fixed to the crystal to simplify the issue. (Mis)orientation is then defined by the world and crystal cartesian coordinate system, which...

I have added a phase 2 to the OP.