Smoothing of EBSD data takes very long, please help

[Terex]

Hi,

I'm following instructions on: https://mtex-toolbox.github.io/files/doc/EBSDSmoothing.html

I want to use the functionality of EBSD data smoothing to produce maps of grain orientations (and internal misorientation). Because my maps cover an area over 1 mm^2, it takes something like half an hour to produce these maps. Is this normal? I am aware of the option: ebsd = reduce(ebsd,3) to speed it up, but the maps do not look nearly as good.

Previously, with MTex 3.5 I could apply the same grain reconstruction for grain orientation maps and the result was fast and to my knowledge accurate. But now it does not seem possible anymore using MTex 4.3.x. Here is my code. Please advise.

%% PLOT GRAIN ORIENTATION DATA ALONG COMPRESSION DIR (Y-VECTOR)

% SMOOTH FILTER TO COMPLETE GRAINS (WARNING: CPU INTENSIVE!)

 F = splineFilter;

 ebsd_smoothed = smooth(ebsd_corrected('indexed'),F,'fill',grains);

 % PLOT GRAIN ORIENTATION DATA 

oMFo = ipdfHSVOrientationMapping(ebsd_smoothed('Forsterite'));

oMFo.inversePoleFigureDirection = yvector;

colorFo = oMFo.orientation2color(ebsd_smoothed('Fo').orientations);

oMEn = ipdfHSVOrientationMapping(ebsd_smoothed('Enstatite'));

oMEn.inversePoleFigureDirection = yvector;

colorEn = oMEn.orientation2color(ebsd_smoothed('En').orientations);

figure

plot(ebsd_smoothed('Fo'),colorFo)

hold on

plot(ebsd_smoothed('En'),colorEn)

plot(grains2.boundary,'linewidth',0.1)

%mtexTitle('Compression direction','FontSize',8)

hold off

[Rüdiger Kilian]

Hi Robert,
yes, smoothing large maps is actually not very fast with some filters, so half an hour might be normal, depending on the size of the map and your computer. In case the splineFilter is too "brutal" in terms of removing low angle boundaries, you might want also to try out the halfquadratic spline filter and tweak a bit the alpha and threshold parameters. Results are quite nice.
Cheers,
Rüdiger

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From: mtex...@googlegroups.com [mtex...@googlegroups.com] on behalf of Terex [rober...@gmail.com]
Sent: Thursday, June 23, 2016 3:19 PM
To: MTEX
Subject: {MTEX} Smoothing of EBSD data takes very long, please help

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