Compare odfs / ebsd-data

[gerd hasenrein]

I have two sets of ebsd data (two lists of several orientations). One is the orignial data set and the orher is a reconstructed one. I want to check now, if they are similar.

What's the best way to compare odfs or ebsd data? And is there any function in mtex doing that?

[Luiz F. G. Morales]

Dear gerd,

What exactly you want to compare? For instance, if texture strength, there are at least three functions to do that, you can look here:

http://mtex-toolbox.github.io/files/doc/ODFCharacteristics.html

You can also compare the eigenvalues and vectors (and derivates) of pole figures calculated from the odf

https://groups.google.com/forum/m/?fromgroups#!searchin/mtexmail/Eigenvalues/mtexmail/RnTcDvUd0JA

Is this what you are looking for?

best

Luiz

On 2. Jan 2018, at 14:36, gerd hasenrein <lapa...@gmail.com> wrote:

I have two sets of ebsd data (two lists of several orientations). One is the orignial data set and the orher is a reconstructed one. I want to check now, if they are similar.

What's the best way to compare odfs or ebsd data? And is there any function in mtex doing that?

--
If you want to reduce the number of emails you get through this forum login to https://groups.google.com/forum/?fromgroups=#!forum/mtexmail, click "My membership" and select "Don't send me email updates". You can still get emails on selected topics by staring them.
---
You received this message because you are subscribed to the Google Groups "MTEX" group.
To unsubscribe from this group and stop receiving emails from it, send an email to mtexmail+u...@googlegroups.com.
Visit this group at https://groups.google.com/group/mtexmail.
For more options, visit https://groups.google.com/d/optout.

ETH Zürich
Luiz F. G. Morales
Scientific Center for Optical and Electron Microscopy (ScopeM)
HPT D 9
Auguste-Piccard-Hof 1
8093 Zurich, Switzerland
Phone +41 44 633 37 46
E-mail: luiz.m...@scopem.ethz.ch
URL: www.scopem.ethz.ch
URL: https://sites.google.com/site/luizfgmorales/
Skype: lfgmorales

[gerd hasenrein]

Thanks Luiz for the fast answer,

I will try to give an example. Lets imagine I have 3 odfs: odf1, odf2 and odf3. Now I want to evaluate wether odf2 or odf3 is more similar to odf1.
I can compare them using special characteristcs, as you explained in your post ( texture index, entropy, ...). In Literature I found an approach using an integral over the squared difference between two odfs: Discrepany = \int_SO3 (odf1(Q) - odf2(Q)) ^2  dQ , where Q depicts a specific orientation

What is a good/standard measure for similarity of two odfs?

best regards