Fig. 4.
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Examples of kernels identified using the watershed method in two frames at 23:40:20 UT and 23:40:50 UT. The first row shows the raw data measured by HRIEUV. The second row shows the data after the 10% Imax threshold has been applied. Rows three and four show the labels that were output by the watershed segmentation method when a minimum marker separation of 4 and 3 pixels was used, respectively.
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