1. arg, param, rosparam的區別
傳送:https://durant35.github.io/2017/07/14/ROS_%3Carg%3E$%3Cparam%3E$%3Crosparam%3E/
傳送:https://durant35.github.io/2017/07/14/ROS_%3Carg%3E$%3Cparam%3E$%3Crosparam%3E/
ROS_INFO帶顏色的輸出 輸出綠色: ROS_INFO("\033[1;32m----> Feature Extraction Started.\033[0m");