阅读器阅读标签：即射频识别，是一种非接触式的自动识别技术，它通过射频信号自动识别目标对象，可快速地进行物品追踪和数据交换。用于仿真实验非常好-Reader reads tags: radio frequency identification, is a non-contact automatic identification technology, automatic target recognition by the RF signal can be quickly performed ass

java目标追踪显示轨迹和长度，运用的是JavaCV中的OpenCV2.4.9和3.1.0版本(Java target tracking shows track and length)