1. 安装ROS，确保测试通过
参考：Ubuntu16.04安装ROS Kinetic详细过程
配置ORB-SLAM3的ROS路径到 ROS_PACKAGE_PATH
sudo vim ~/.bashrc //把下边这行代码加到bashrc里去，这样每次开启终端都会执行这行代码 export ROS_PACKAGE_PATH=${ROS_PACKAGE_PATH}:/home/PATH_TO_ORB-SLAM3/ORB_SLAM3/Examples/ROS source ~/.bashrc
报错：[rosbuild] rospack found package "ORB_SLAM2" at "", but the current directory is "/home/nvidia/ORBSLAM2/ORB_SLAM2/Examples/ROS/ORB_SLAM2"解决方法:
sudo ln -s /path-to-orbslam3/Examples/ROS/ORB_SLAM3 /opt/ros/kinetic/share/ORB_SLAM3
2. 准备数据如下载Euroc数
