Task3/line_follower/launch/line_follow_debug.launch

<launch>
  <!-- Camera and base driver must already be running elsewhere. -->
  <arg name="config" default="$(find line_follower)/config/line_follow_debug.yaml"/>
  <arg name="image_topic" default="/usb_cam/image_raw"/>

  <node pkg="line_follower" type="line_follow_debug.py" name="line_follow_debug" output="screen">
    <rosparam command="load" file="$(arg config)"/>
    <param name="image_topic" value="$(arg image_topic)"/>
  </node>
</launch>