ROS Tutorial: How to use OpenCV in a Robot Pick and Place task for Computer Vision - Robotics Casual
Link: ROS Tutorial: How to use OpenCV in a Robot Pick and Place task for Computer Vision - Robotics Casual: "We learn how to use OpenCV with ROS in a pick and place task and how to apply Computer Visions algorithms to 3D camera data."
A pretty comprehensive tutorial about using OpenCV in ROS Robotics algorithms,