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Representative cases (Case: 1–7) of tracking results for the targets with different moving states. The green bounding box shows the output of a tracker. There are seven kinds of moving state, as shown in Case (1–7): entering (Case 1), tracking normally (Case 2), fragmentation (Case 3), occlusion (Case 4), invisible (Case 5), lost tracking (Case 6) and leaving (Case 7).
