Figure 3: Tracking on the Car-behind-trees sequence with total occlusion. The car velocity is constant during the time of observation. Significant partial occlusion and total occlusion occur in the sequence. Top three rows: tracking with the proposed method. During total occlusion, the shape tracking term predominates to guide contour evolution. After total occlusion (third row) the car is detected although the detected silhouette is inaccurate. Fourth row: tracking with the method in [13]. Last row: tracking with the method in [10].