Description

Some indexing programs write a value for every pixel of the scan grid, including the ones a ROI mask kept out of the run, and flag only the patterns they genuinely failed to index. The masked pixels then arrive as a perfectly valid looking phase sitting at orientation (0,0,0) with every quality measure at zero - EMSphInx does exactly this. Left alone they fuse into one huge spurious grain.

A zero orientation on its own is a legitimate measurement, so it is not enough on its own: a pixel is only taken as never measured when its orientation is the identity and every quality measure the file provides (image quality, confidence index, fit metric, ...) is exactly zero. That combination does not occur in real data.

Only quality measures count, not every numeric property: an SEM signal keeps reading outside the ROI, and MTEX adds index columns of its own (gridify writes oldId), so a rule over all properties would quietly never fire again the moment such a column is present.

Syntax

ebsd = markUnmeasured(ebsd)

Input

ebsd EBSD

Output

ebsd EBSD, unmeasured pixels set to the notIndexed phase

Citing this page. This page is part of the documentation of MTEX, a free and open source MATLAB toolbox for analyzing and modeling crystallographic textures. It was written by The MTEX Developers and is published at https://mtex-toolbox.github.io/markUnmeasured.html. If you use MTEX, or reuse text or figures from this page, in your research, please cite

F. Bachmann, R. Hielscher, H. Schaeben: Texture Analysis with MTEX - Free and Open Source Software Toolbox, Solid State Phenomena 160 (2010), 63-68. 10.4028/www.scientific.net/SSP.160.63

BibTeX

@article{bachmann2010mtex,
  author  = {F. Bachmann and R. Hielscher and H. Schaeben},
  title   = {Texture Analysis with MTEX - Free and Open Source Software Toolbox},
  journal = {Solid State Phenomena},
  volume  = {160},
  pages   = {63-68},
  year    = {2010},
  doi     = {10.4028/www.scientific.net/SSP.160.63},
  url     = {https://doi.org/10.4028/www.scientific.net/SSP.160.63}
}

Other papers describing specific MTEX methods are listed under Publications — please cite the one that best fits your application. The MTEX source code is licensed under the GNU General Public License v2.0; the text and figures of this documentation are licensed under CC BY 4.0, which permits reuse — including by automated systems — provided The MTEX Developers and this page are credited.