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JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)
    
Object compressive tracking based on adaptive multi-feature appearance model
LU Wei1,2, XIANG Zhi-yu1,2, YU Hai-bin3, LIU Ji-lin1,2
1. Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China; 2. Zhejiang Provincial Key Laboratory of Information Network Technology, Hangzhou 310027, China; 3. School of Electronic and Information, Hangzhou Dianzi University, Hangzhou 310018, China
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Abstract  

An adaptive multi-feature modelling method was proposed to resolve the problems of simple feature and inflexible modelling existed in the appearance model of compressive tracking. This method makes the visual representation more abundant and comprehensive through fusing intensity with the Surf-type feature which has strong power to describe the detail information like gradient and edge. A two-stage measurement matrix is constructed to measure the multi-dimension features. The Hellinger distance between a feature’s distributions of positive and negative samples is computed to analyze the feature’s ability of discriminating the object from background. The weights of features in the statistical model can be adjusted adaptively to help the model efficiently explore information that is useful for object tracking, and update according to the changes of object and background. Experimental results show that this adaptive multi-feature modelling method can describe the complex changes of object and background in the real world more accurately, and greatly improve the tracking algorithm’s robustness and precision, while holding the high efficiency.



Published: 01 December 2014
CLC:  TP 242.6  
Cite this article:

LU Wei, XIANG Zhi-yu, YU Hai-bin, LIU Ji-lin. Object compressive tracking based on adaptive multi-feature appearance model. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2014, 48(12): 2132-2138.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2014.12.005     OR     http://www.zjujournals.com/eng/Y2014/V48/I12/2132


基于自适应多特征表观模型的目标压缩跟踪

针对压缩跟踪算法中表观模型的视觉表达特征单一、统计模型缺乏柔性的问题,提出一种自适应的多特征表观建模方法.该方法引入了对梯度、边缘等图像细节描述能力更强的Surf特征,并通过构建两级观测矩阵解决多维特征的观测问题,与亮度特征进行融合,使视觉表达更加丰富、全面;通过计算正负样本特征所服从的概率分布曲线的Hellinger距离,分析特征对目标和背景的区分能力,自适应地调整统计模型中各特征之间的权重,使统计模型能更好地利用对目标跟踪有益的信息,根据目标和背景的变化及时进行更新.实验结果表明:该自适应多特征表观模型能更加准确地描述实际场景中目标和背景的复杂变化,在保持高效率的同时,极大地提高了跟踪算法的鲁棒性和准确性.

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