Document Detail

A 3D Hough transform for indexing EBSD and Kossel patterns.
MedLine Citation:
PMID:  18503678     Owner:  NLM     Status:  MEDLINE    
A three-dimensional Hough transform is designed for the detection of conic curves (hyperbolae and ellipses) formed by the gnomonic projection of diffraction Kossel cones. This new procedure is applied to a high-angular-accuracy analysis of electron backscatter diffraction (EBSD) patterns and to a fully automatic indexing of X-ray Kossel patterns in the SEM. The high-accuracy analysis of EBSD patterns allows for the determination of local elastic strains, without any reference pattern, and with a spatial resolution of a few tens of nanometres. An accuracy of 2 x 10(-4) is achieved on geometrically calculated diagrams. This paper presents also the first fully automatic indexing of Kossel patterns. This automatic indexing procedure can be applied to local texture analysis, as well as to local elastic strain measurements. Although the spatial resolution of Kossel is about 1 microm, the accuracy of strain measurement is in this case much higher than that presently obtained on EBSD.
C Maurice; R Fortunier
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of microscopy     Volume:  230     ISSN:  1365-2818     ISO Abbreviation:  J Microsc     Publication Date:  2008 Jun 
Date Detail:
Created Date:  2008-05-27     Completed Date:  2008-07-31     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0204522     Medline TA:  J Microsc     Country:  England    
Other Details:
Languages:  eng     Pagination:  520-9     Citation Subset:  IM    
Ecole des Mines de Saint-Etienne, Centre SMS, UMR CNRS 5146, 158 cours Fauriel, 42023 Saint-Etienne Cedex 2, France.
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MeSH Terms
Crystallography / methods
Imaging, Three-Dimensional / methods*
Microscopy, Electron, Scanning / instrumentation*,  methods
Pattern Recognition, Automated / methods*
Radiographic Image Interpretation, Computer-Assisted / methods*
X-Ray Diffraction

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