偏移校正的核空间直方图目标跟踪

王勇; 陈分雄; 郭红想

doi:10.3724/SP.J.1004.2012.00430

偏移校正的核空间直方图目标跟踪

doi: 10.3724/SP.J.1004.2012.00430

1.
中国地质大学机电学院武汉 430074

详细信息

通讯作者:
王勇, 博士, 中国地质大学机电学院讲师.主要研究方向为智能视频监控,模式识别. E-mail: wy112708@163.com

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- 文章访问数: 1888
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- 被引次数: 0
出版历程
- 收稿日期: 2010-04-19
- 修回日期: 2011-04-10
- 刊出日期: 2012-03-20

Kernel Spatial Histogram Target Tracking Based on Template Drift Correction

1.
Faculty of Mechanical and Electronic Information, China University of Geoscience, Wuhan 430074

摘要

摘要: 针对传统均值漂移算法中核函数直方图对目标特征描述较弱、跟踪窗不能动态调整容易导致目标跟偏或跟丢的缺点, 提出了一种改进的均值漂移跟踪算法.为提高目标特征描述的可靠性, 采用二阶空间直方图建立目标模型,以Bhattacharyya系数作为相似性度量; 通过偏移校正更新目标区域参数建立新的目标模型; 结合边缘与角点检测选取特征点建立仿射模型实现跟踪窗的调整; 根据卡尔曼残差判断目标是否被遮挡,从而选择卡尔曼滤波或是线性预测来确定目标位置. 实验结果表明,该算法可以准确地跟踪目标,对相似背景干扰、目标大小与方向的变化以及短时遮挡具有鲁棒性.
- 目标跟踪 /
- 均值漂移算法 /
- 空间直方图 /
- 偏移校正
Abstract: Aiming at the limitations of the traditional mean shift, such as invariable kernel bandwidth, inadequate color distribution representation of target and the accumulative tracking errors, an improved tracking algorithm with the following strategies is proposed. The target model and the candidate are described by a modified second-order spatial histogram including color and spatial information, and the similarity between them is evaluated by Bhattacharyya coefficient. According to the target region parameter resulted from template drift correction which can eliminate the tracking errors, the target model can be estimated repeatedly. The tracking region parameters are updated through an affine transform combining corner detection and edge detection. Besides, the target motion is predicted by either Kalman filter or linear filter according to the Kalman residual error. Experimental results show that the proposed algorithm is robust against similarity distraction, scale and orientation variations and short-term occlusion.
- Target tracking /
- mean shift /
- spatial histogram /
- drift correction

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参考文献(1)

[1]

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