3.3 Movement assessment

We expected the cameras to detect and track fish moving in the corridor consistent with the direction of the tidal flow (i.e. bream moving to seagrass). The expected results were that bream would mostly move to the left (Set 1) and to the right (Set 2) and these patterns were observed when manually analysing the videos (ground-truth). We found that the movement direction with the highest proportion for all tracking architectures were left (Set 1) and right (Set 2) (Figure 3). For Set 1, SeqNMS (0.53) was the closest to the ground-truth (0.65) and for Set 2, MOSSE (0.49) and SeqNMS (0.41) were the closest to the ground-truth (0.71) (Figure 3).