IQ map

[jaywai412]

Hello,

I have plotted IPF maps and characterized the structural properties of gb using MTEX. Thank you very much for sharing the tool.
I am trying to plot IQ maps and measure IQ values across grain boundaries; my raw data file is osc file.
Could you let me know how I should do? I could't find materials related to IQ in the archives.
Thank you.

[nyyssont]

Hello,

I would try

figure
plot(ebsd,ebsd.iq)
colormap gray

[kilir]

Hi,
here's a minimal example to directly get the ci (or whatever measure you have for each EBSD point) across the boundary:

mtexdata olivine
[grains, ebsd.grainId]=ebsd.calcGrains;

% ebsd along/across boundary
ebsd_gb = ebsd('id',grains.boundary('indexed','indexed').ebsdId);

% ci along boundary
ci_gb= ebsd_gb.prop.ci

plot(ebsd_gb,ci_gb)

Cheers,
Rüdiger

[jaywai412]

Hi,

I have executed the following code after loading an ebsd data from osc file, which includes iq data.
I got an error saying that there is no field named as 'ci' (or 'iq').
FYI, I am using the version 5.4.0.
Thank you very much.

ebsd = EBSD.load(fname,CS,'interface','osc','convertEuler2SpatialReferenceFrame');
[grains, ebsd.grainId]=ebsd.calcGrains;
ebsd_gb = ebsd('id',grains.boundary('indexed','indexed').ebsdId);

% ci along boundary
ci_gb= ebsd_gb.prop.ci
plot(ebsd_gb,ci_gb)

[ralfHielscher]

If you type in ebsd into the command line it shows you which properties MTEX has found in your data. In the case of osc files it is probably called ebsd.imagequality.

Ralf.

[jaywai412]

The property name was imagequality like you said.
Now, I can read the iq data from the file. Thank you very much.
But, there are a few undefined white data points in the plot.
I tried to fill the data using the following command as guided in the manual, but it did not work: ebsd_filled = fill(ebsd,grains);
Doesn't this function work for IQ data?

Another thing I am trying to do is to plot IQ values along a line crossing a particular grain boundary (like a height profile).
Is there an API that can sample data along a line specified with coordinates (ebsd.x and ebsd.y)?

Thank you.

[ralfHielscher]

Hi,

it is good practice to open up new threads for follow up questions. Because it helps to keep this forum in a searchable knowledge base.

Ralf.

[ralfHielscher]

You should also mark this question as answered :)

[jaywai412]

Ralf,

I was not familiar with the github forum.
Now, this question is marked as answered and a new thread is opened for my additional questions.

Thank you.