Person-Tracking with Occlusion Using Appearance Filters

To deal with the problem of tracking person with a mobile robot in dynamic scene with occlusion, a tracking system is presented in this paper. We focus on the individual person tracking system, which is applied on our two-wheel mobile robot with a single PTZ (pan-tilt-zoom) camera. The tracking system works reliably in the dynamic environment with partial/complete occlusion. For the sake of complete occlusion, we use several filters and spatial relation restriction to represent the target model. These filters are all based on the appearance of the target, and each filter models a part of human body which is more rigid than the entire body. To construct a tracking system, the situation-based strategy and a simple frame-to-frame tracker are involved in the system, and an improved mean-shift tracking algorithm is applied as the tracker in this paper. Finally, experimental results on tracking individual person with complete occlusion in different environments are shown, which demonstrate the robustness and effectiveness of the algorithm