Online Metric-Weighted Linear Representations for Robust Visual Tracking

Xi Li, Chunhua Shen, Anthony Dick, Zhongfei Mark Zhang, Yueting Zhuang
2016 IEEE Transactions on Pattern Analysis and Machine Intelligence  
In this paper, we propose a visual tracker based on a metric-weighted linear representation of appearance. In order to capture the interdependence of different feature dimensions, we develop two online distance metric learning methods using proximity comparison information and structured output learning. The learned metric is then incorporated into a linear representation of appearance. We show that online distance metric learning significantly improves the robustness of the tracker, especially
more » ... on those sequences exhibiting drastic appearance changes. In order to bound growth in the number of training samples, we design a time-weighted reservoir sampling method. Moreover, we enable our tracker to automatically perform object identification during the process of object tracking, by introducing a collection of static template samples belonging to several object classes of interest. Object identification results for an entire video sequence are achieved by systematically combining the tracking information and visual recognition at each frame. Experimental results on challenging video sequences demonstrate the effectiveness of the method for both inter-frame tracking and object identification.
doi:10.1109/tpami.2015.2469276 pmid:26390446 fatcat:tinsryf77vcj5b7tsw3m5726sq