Pole figures are all dark in Bulk Load From File
Rumman Ul Ahsan
Michael Jackson
There are 2 possible issues. The first and easiest is that you clicked the “Load Data” button. Sometimes we forget to click the button. Let’s assume that you got that far. The size of the pole figures are only 200 pixels on a side and if you have a very large number of points that you are loading what happens in effect is that you fill every pixel with a black value. You have 2 choices at this point. Try changing the “Type” to Lambert instead of Discrete and/or also try changing the size to 1024. Since 1024 is really large then you may just need to save the pole figure as an image on your hard drive and open the image with any image viewer. The button to save the pole figure as an image is the second from the left just below the pole figures. Give those a try and let us know if you were able to get your data imported.
Sigma and Weight values of 1 are fine for importing an ebsd data set. Also note that if you are directly importing from a .CTF file EVERY point whether it was successfully indexed by Bruker or not will be imported. This can lead to ODF bias that you may not really want.
A better way to do this would be to use the “Export StatsGenerator ODF Angle File” filter. I have included an image of the filter placed into one of the sample pipelines that comes with DREAM.3D. Much easier to do it this way.
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Michael Jackson | Owner, President
BlueQuartz Software
From: <dream3...@googlegroups.com> on behalf of Rumman Ul Ahsan <r.ahs...@gmail.com>
Date: Tuesday, April 6, 2021 at 5:41 PM
To: dream3d-users <dream3...@googlegroups.com>
Subject: Pole figures are all dark in Bulk Load From File
Hi,
I am trying to generate an RVE for use in DAMASK. While importing the data, I am facing some issues with the ODF import I believe. My original pole figures are in the first figure. However, after "Bulk Load From File" the pole figures are almost entirely black as in the second figure.
For clarification, my original data is in .ctf format from a Bruker instrument. I have modified the data as shown in the tutorial from PRISM center on youtube (https://www.youtube.com/watch?v=wdrJufoEVHY).
I was wondering what am I doing wrong? I am also considering the manual entry of the data. In that case, how do iI determine the weight and sigma value?
Any help/suggestion regarding this will be much appreciated!
Thanks!
Rumman.
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