#include "gazebo/sensors/DepthCameraSensor.hh"
#include "rotors_gazebo_plugins/common.h"
#include "rotors_gazebo_plugins/external/gazebo_optical_flow_plugin.h"
#include <highgui.h>
#include <math.h>
#include <string>
#include <iostream>
#include <boost/algorithm/string.hpp>