Hierarchical Template Matching for Robust Visual Tracking with Severe Occlusions

作     者：Lizuo Jin Tirui Wu Feng Liu Gang Zeng 

作者机构：School of Automation Southeast University ZTE Corporation 

出 版 物：《ZTE Communications》 (中兴通讯技术（英文版）)

年 卷 期：2012年第10卷第4期

页      面：54-59页

学科分类：081104[工学-模式识别与智能系统] 08[工学] 080203[工学-机械设计及理论] 0802[工学-机械工程] 0811[工学-控制科学与工程] 

基　　金：supported by the Aeronautical Science Foundation of China under Grant 20115169016 supported in part by the technique cooperation project of ZTE on Intelligent Video Analysis in 2012 

主　　题：visual tracking hierarchical template matching layeredappearance model occlusion analysis 

摘      要：To tackle the problem of severe occlusions in visual tracking, we propose a hierarchical template-matching method based on a layered appearance model. This model integrates holistic- and part-region matching in order to locate an object in a coarse-to-fine manner. Furthermore, in order to reduce ambiguity in object localization, only the discriminative parts of an object＇ s appearance template are chosen for similarity computing with respect to their cornerness measurements. The similarity between parts is computed in a layer-wise manner, and from this, occlusions can be evaluated. When the object is partly occluded, it can be located accurately by matching candidate regions with the appearance template. When it is completely occluded, its location can be predicted from its historical motion information using a Kalman filter. The proposed tracker is tested on several practical image sequences, and the experimental results show that it can consistently provide accurate object location for stable tracking, even for severe occlusions.