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DOI:
Journal of Software:2009.20(7):1726-1734

基于边界力的Mean-Shift 核窗宽自适应算法
覃剑,曾孝平,李勇明
(重庆大学 通信工程学院,重庆 400030)
Algorithm of Adaptive Kernel-Bandwidth for Mean-Shift Based on Boundary Force
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Received:July 09, 2007    Revised:February 27, 2008
> 中文摘要: 针对Mean-Shift(中值漂移)算法中核函数带宽不能实时改变的缺陷,提出一种基于边界力的Mean-Shift核函数带宽自适应更新算法.在分析目标加权核直方图模型的基础上,引入区域似然度以提取目标的局部信息.然后,比较相邻帧间的区域似然度并构建边界力.通过对边界力的计算,得到边界点的位置,进而自适应地更新核函数带宽.实验结果表明,这些工作改善了Mean-Shift 算法在目标尺度和形态发生变化时的跟踪效果,并且可以满足实时性的需要.
Abstract:An adaptive scale updating algorithm based on boundary force is presented to improve the deficiency that the kernel-bandwidth of Mean-Shift is not changeable. Based on the analysis of weighted histogram of the target feature, this paper introduces a region likelihood to extract local information of the target. Then, by comparing the region likelihood in successive frames, it constructs a boundary force to locate the boundary points of the target model and updates the bandwidth of kernel-function adaptively. The experimental results show that the proposed method improves the effect of Mean-Shift when the size or shape of target changes and satisfies the real-time request.
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基金项目:Supported by the National Natural Science Foundation of China under Grant No.30570473 (国家自然科学基金); the DevelopmentFoundation for Information Industry of Chongqing of China under Grant No.20051022 (重庆市信息产业发展基金) Supported by the National Natural Science Foundation of China under Grant No.30570473 (国家自然科学基金); the DevelopmentFoundation for Information Industry of Chongqing of China under Grant No.20051022 (重庆市信息产业发展基金)
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覃 剑,曾孝平,李勇明.基于边界力的Mean-Shift 核窗宽自适应算法.软件学报,2009,20(7):1726-1734

.Algorithm of Adaptive Kernel-Bandwidth for Mean-Shift Based on Boundary Force.Journal of Software,2009,20(7):1726-1734