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Figure 9
Comparison between Interactive and Hysteresis thresholding in an aggregate of olivine + serpentine (negative contrast: serpentine is brighter; olivine is darker). (a) Tomography after twisting. Sample motions artefacts are present, and Hysteresis is used. White arrows show local `unwanted' segmentation (see text) that is present if Interactive is used. The `unwanted' segmentation is not present if Hysteresis is used. (b) Tomography before twisting. Artefacts are not observed, and Interactive is used.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
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