Part-Based Visual Tracking via Online Weighted P-N Learning

Figure 4

Illustration of tracking process. Part (I): segmentation of object in initial frame (first frame). Object is divided into six blocks. Part (II): tracking object without occlusion. Green block and blue block are selected as LFBs in image (b). Green and blue dotted line rectangles in image (c) are the tracking results of LFBs, and the red dotted line rectangle in image (d) represents the location of object estimated by the tracking results of LFBs. Part (III): tracking object with occlusion yet valid LFBs. Essentially, this process is similar to part (II). Occlusion does not affect the tracking. Part (IV): tracking object with occlusion with invalid LFB. In this part, green LFB is occluded and therefore invalid. We replace it with another new valid LFB, namely, the pink LFB, as shown in image (h). The object is then located in image (j) by tracking results of blue LFB and pink LFB in image (i).