title: how to use OpenCV-Python in ROS
body: <p><strong>using yolo with opencv-python in ROS environment</strong>
  I want to use yolo with Opencv-python in ROS to control a camera and realize object detection.
  Now I've already know how to run yolo in Windows,but I don't know how to run it in ROS.
  how can I port my code in ROS?</p>