text: /**
   * BSD 3-Clause License
   * Copyright (c) 2020, Kapil Rawal
   * All rights reserved.
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * Redistributions of source code must retain the above copyright notice, this
   * list of conditions and the following disclaimer.
   * Redistributions in binary form must reproduce the above copyright notice,
   * this list of conditions and the following disclaimer in the documentation
   * and/or other materials provided with the distribution.
   * Neither the name of the copyright holder nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *  @copyright (c) BSD
   *
   *  @file   main.cpp
   *
   *  @author   Kapil Rawal (kapilrawal1995@gmail.com)
   *
   *  @copyright   BSD License
   *
   *  @brief   main file for FeatureTracker Class
   *
   *  @section   DESCRIPTION
   *
   *  Main node for FeatureTracker class
   *
   */
  
  #include "feature_tracker.h"
  
  int main(int argc, char **argv) {
      // feature tracker node
      ros::init(argc, argv, "feature_tracker_node");
      ROS_INFO_ONCE("Feature Tracker node started");
      ros::NodeHandle nh;
      ros::NodeHandle nhPrivate("~");
      // making feature tracker class object
      FeatureTracker tracker(nhPrivate);
      // staring feature tracker
      tracker.track();
      return 0;
  }
  