March 2018
Intermediate to advanced
1396 pages
42h 14m
English
book
ROS Programming: Building Powerful Robots
by Anil Mahtani, Luis Sanchez, Enrique Fernandez, Aaron Martinez, Lentin Joseph
Content preview from ROS Programming: Building Powerful Robots
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Image processing using ROS and OpenCV
In this section, we will see an example of using cv_bridge for acquiring images from a camera driver, and converting and processing the images using OpenCV APIs. Following is how the example works:
- Subscribe the images from the camera driver from the topic /usb_cam/image_raw (sensor_msgs/Image)
- Convert the ROS images to OpenCV image type using CvBridge
- Process the OpenCV image using its APIs and find the edges on the image
- Convert the OpenCV image type of edge detection to ROS image messages and publish into the topic /edge_detector/processed_image
The step by step procedure to build this example follows: