Region of interest as observed by (a) HRIEUV and (b) AIA. For display purposes, these images were processed using MGN. The images are mapped into Carrington coordinates to better compare the features observed from the two viewpoints. The yellow contour bounds a transequatorial CH, and the filament is labelled with a cyan contour. (c) A comparison of the segmented filament and CH regions from both instruments with the filament in dark blue contours (HRIEUV) and cyan (AIA), and the CH in orange (HRIEUV) and yellow (AIA).