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Fig. 2.


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Examples of time slices. Slices 16 and 8 (red continuum) show traces of bright PGs and dark bodies of filaments, respectively. Slices 8 and 19 (G band) show traces of GBPs and the expansion and contraction of the penumbra–granulation border, respectively. Top row: original time slices. Bottom row: time slices enhanced by unsharp masking together with red lines drawn manually to measure speeds and durations of features.

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