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Related Experiment Video

Updated: Jun 5, 2026

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
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A method for accurate localisation of EBSD pattern centres.

Claire Maurice1, Krzysztof Dzieciol, Roland Fortunier

  • 1SMS Centre, UMR CNRS 5146, Ecole des Mines de Saint-Etienne, 158 cours Fauriel, 42023 Saint-Etienne, Cedex 2, France. maurice@emse.fr

Ultramicroscopy
|December 28, 2010
PubMed
Summary
This summary is machine-generated.

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A new iterative cross-correlation method precisely locates the pattern center and zoom factor in electron backscatter diffraction (EBSD) patterns. This technique rapidly achieves sub-pixel accuracy, enhancing EBSD analysis.

Area of Science:

  • Materials Science
  • Crystallography
  • Electron Microscopy

Background:

  • Accurate pattern center and zoom factor determination is crucial for precise crystallographic orientation mapping using Electron Backscatter Diffraction (EBSD).
  • Existing methods for pattern center localization can be computationally intensive or lack precision.

Purpose of the Study:

  • To develop and validate a robust, iterative cross-correlation technique for determining the zoom factor and pattern center in EBSD patterns.
  • To improve the accuracy and efficiency of pattern center localization for enhanced EBSD data quality.

Main Methods:

  • An iterative cross-correlation procedure was developed, starting with a coarse estimation using entire diffraction patterns.
  • Subsequent iterations utilized smaller regions of interest (ROIs) to refine the displacement field, minimizing zoom factor and center position misfits.

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  • The procedure was validated using simulated EBSD patterns.

    • Main Results:

    • The iterative cross-correlation method rapidly converged to the exact solution for simulated patterns.
    • Achieved accuracy was better than 1/100th of a pixel, demonstrating high precision.
    • The technique effectively determined both zoom factor and pattern center simultaneously.

    Conclusions:

    • The developed iterative cross-correlation technique offers a highly accurate and efficient solution for pattern center and zoom factor determination in EBSD.
    • This method has significant potential for application with experimental EBSD data and could inform the design of new EBSD detectors.
    • Improved pattern localization will lead to more reliable crystallographic analysis from EBSD measurements.