During contour evolution, the particle filter (PF) is used to track the feature points by enforcing spatiotemporal local constraints to handle the observation noise.
为避免观测噪声的影响，增加轮廓的时空局部约束并利用粒子滤波(PF)技术解决该类跟踪问题是非常有效的。
Particle filter (PF) is an optimal nonlinearity filtering method which rises in recent years.
粒子滤波（PF）是近年来兴起的一种最优非线性滤波方法。
Compared with the particle filter (PF), it avoids the resampling step and the particle degeneracy phenomenon.
与粒子滤波算法相比，其优点是不需要重采样步骤和不存在粒子退化现象。
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