text: //
  // Created by hai on 2/6/19.
  //
  
  #include <obstacle_estimator/obstacle_filter.h>
  
  int main(int argc, char **argv)
  {
      // Set up ROS
      ros::init(argc, argv, "obstacle_filter_node");  // node name
      ros::NodeHandle nh;                             // create a node handle
  
      // Initialize a class object and pass node handle for constructor
      Obstacle_Filter obstacle_filter(nh);
  
      // Let ROS handle all callbacks
      // specify the publishing rate
      // ros::Rate loop_rate(node_rate);
      // while (ros::ok())
      // {
      //     ros::spinOnce();
      //     loop_rate.sleep();
      // }
  
      // not specify the publishing rate
      ros::spin();
  
  
      return 0;
  }