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Figure 4
A spot family contains images in which a reflection appears across the raster scan. This information can be converted into a two-dimensional diagram (a), called an `appearance map', which shows where the reflection appears on the sample surface. These maps feature the shape of a grain and possibly spurious regions that do not belong to it. To remove them, CCA is used. The output of CCA is a labeled image (b) that identifies the different connected components, indicated here by colors corresponding to different labels. (c) Only the largest among them is kept to isolate the grain of interest.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 59| Part 5| October 2026| Pages 1584-1594
https://doi.org/10.1107/S1600576726007995