摘要
针对Meanshift核函数带宽不能实时改变的缺陷,提出一种仿射变换下的核函数带宽可变的Meanshift跟踪算法。以仿射变换来描述目标尺寸随时间的变化,分别利用Meanshift和连续两帧中匹配窗口的最大相关系数来得到仿射变换的参数。以比例参数计算出带宽的实时变化,其它参数可提供Meanshift更好的起始位置。这些工作改善了Meanshift算法在目标尺寸变化时的跟踪效果。实验证明,本算法能够有效地跟踪尺寸变化的目标,并且具有更好的实时性。
A new algorithm of variable bandwidth target tracking based on Mean shift is put forward to improve deficiency that the bandwidth of kernel function of Mean shift is not changeable. The variation of target with time is described by affine transform. Mean shift method and the method based on the biggest correlation coefficient between two match windows in two continuous frames are respectively used to get the parameters of affine transform. The change of bandwidth in time is calculated with scale parameter of affine parameters, and other parameters provide a better initial position of tracking. These works improve the effect of Mean shift when size of target changes in real time. The algorithm is proved to have better effect and satisfy the real-time request through experiments.
出处
《光电工程》
EI
CAS
CSCD
北大核心
2006年第8期11-16,共6页
Opto-Electronic Engineering
