Segmentation of HD-EMG map from biceps of subject 2 during flexion at 10% MVC. The original map and its topographical view is presented at the top of the figure (left and right respectively). The segmentation obtained by h-dome transform is presented at bottom-left. The active zone in light blue is correctly isolated from the background image (displayed in dark blue). The watershed segmentation obtained 3 different zones: light blue, yellow and dark red (bottom-right) as consequence of multiple regional maxima indicated by arrows in the topographical view of the map. The final result of the segmentation is obtained after discarding those pixels whose intensity value is below 70% of the maximum intensity in each of the segmented zones. Such pixels correspond to the background (dark blue).