| 利用颜色的非刚性物体跟踪方法 |
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| 作者姓名： | Katja Nummiaro Esther Koller-Meier Luc Van Gool |
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| 作者单位： | 1.Katholieke Universiteit Leuven,ESAT/PSI-VISICS,Kasteelpark Arenberg 10,3001 Heverlee,比利时; |
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| 基金项目： | SupportbytheEuropeanISTprojectSTAR (IST 2 0 0 0 2 8764 )andbytheGOA/VHS +projectfinancedbytheResearchFundofKatholiekeUniversiteitLeuven,Belgium |
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| 摘 要： | 提出了一个利用颜色特征实时跟踪非刚性物体的方法.首先.建立了一个颜色分布模型,该模型对部分遮挡具鲁棒性,对放缩和旋转具不变性,且计算简单.对非刚体物体的实时鲁棒跟踪是一个非常有挑战性的课题,本文提出了利用颜色特征实时跟踪非刚体物体的方法.首先，建立了一个颜色分布模型,该模型对部分遮挡具有鲁棒性,对放缩具有不变性,而且计算简单.然后,采用粒子滤波的方法将颜色分布模型集成到一个动态状态估计的概率框架中.为了处理光照变化等引起的外貌变化,进一步引入自适应模型更新过程.同时,本文还讨论了初始化策略用以处理跟踪物体的消失或消失后再出现的情况.
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| 关 键 词： | 粒子滤波 颜色分布 Bhattacharyya系数 |
| 收稿时间： | 2002-11-28 |
Color Features for Tracking Non-Rigid Objects |
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| Katja Nummiaro,Esther Koller-Meier,Luc Van Gool.Color Features for Tracking Non-Rigid Objects[J].Acta Automatica Sinica,2003,29(3):345-355. |
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| Authors: | Katja Nummiaro Esther Koller-Meier Luc Van Gool |
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| Affiliation: | 1.Katholieke Universiteit Leuven,ESAT/PSI-VISICS,Kasteelpark Arenberg 10,3001 Heverlee,Belgium;Swiss Federal Institute of Technology(ETH).D-ITET/BIWI,Gloriastrasse 35,8092 Zurich,Switzerland |
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| Abstract: | Robust real-time tracking of non-rigid objects is a challenging task. Color distributions provide an efficient feature for this kind of tracking problems as they are robust to partial occlusion, are rotation and scale invariant and computationally efficient. This article presents the integration of color distributions into particle filtering, which has typically been used in combination with edge-based image features. Particle filters offer a probabilistic framework for dynamic state estimation and have proven to work well in cases of clutter and occlusion. To overcome the problem of appearance changes, an adaptive model update is introduced during temporally stable image observations. Furthermore, an initialization strategy is discussed since tracked objects may disappear and reappear. |
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| Keywords: | Particle filtering color distribution Bhattacharyya coefficient |
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