Overview of the morphological processing techniques described in the text. Panel a: a portion of the FOV in Hα wing (−38 km s⁻¹) at time t = 09:24 UT (scan:50). Blue contours on this image indicate the RBEs detected with RPs 0–3 as discussed in the text, panel b: binary mask of the detected RBEs, and panel c: result after performing connected component labeling of the binary mask in panel b. The labels are color coded as seen in the adjoining colorbar. The total number of labels for RBEs over the full FOV and full duration corresponds to 19 643. Panel d: same FOV as in panel a but at time t = 10:43 UT (scan:400). Cobalt blue colored contours in panel e show the masks of detected RBEs obtained after performing morphological labeling, and panel f shows the fitted ellipses with their centers (green), semi-major axis and semi-minor axis (red) for each label shown in panel e.