摘要
高斯粒子概率假设密度(PHD)滤波往往假定杂波密度参数已知,这种做法对于实际应用是不现实的。此外,杂波的参数值通常依赖于环境条件,可能随时间发生变化。因此,多目标跟踪算法中需要实时准确估计杂波密度的参数。基于此,提出了一种多目标跟踪的区域杂波估计方法。首先根据量测信息在线估计出场景中的杂波数目,然后估计落入目标附近感兴趣区域的杂波数,并估计每个目标感兴趣区域杂波强度。仿真结果表明,在复杂场景下算法的跟踪性能明显优于未进行杂波估计的多目标跟踪算法,提高了跟踪的实时性和跟踪精度。
Gaussian mixture particle probability hypothesis density （PHD） filter often assumes that the clutter density param- eters are known. This method is impractical for real applications. In addition, the parameter values of the clutter points are usually dependent on environmental conditions, and they may change over time. Therefore, it is desirable for multiple-target tracking algorithm in real time to estimate the clutter density parameters. In this paper, a method of the clutter estimation a- bout multi-target tracking is presented. Firstly, we estimate the number of clutter points in the scene online. Secondly, we estimate the clutter number and intensity in each region of interest. Simulation results show that its tracking performance is much better than those of multiple-target tracking algorithms which have not estimated the clutter intensity in complex situa- tions and that it improves the real-time tracking and tracking accuracy.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2014年第4期1091-1101,共11页
Acta Aeronautica et Astronautica Sinica
基金
国家级项目(9140A******13DZ01)~~
关键词
概率假设密度
目标跟踪
粒子滤波
杂波估计
随机有限集
probability hypothesis density target tracking particle filter clutter estimation random finite set
