中文说明：本代码是基于粒子滤波的视频单目标跟踪，手动的选择初始目标，采用颜色直方图作为每一个粒子的后验概率，对目标建立颜色模板，最后得到的权重最大的粒子为目标的位置。
English Description：
This code is a video single target tracking based on particle filtering and manual selection of the initial goal, using color histogram as each particle of a posteriori probability, established color template, and finally the biggest as the goal of the position of the particle.