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ROS and OpenCV are two totally independent projects. All you need to do in ROS is to transform the image message into an opencv image using cv_bridge. Once you have this image, you can do whatever you want with it using OpenCv functionalities. Check the extremely extensive OpenCV documentation and tutorials either in Python or C++.

ROS and OpenCV are two totally independent projects. All you need to do in ROS is to transform the image message into an opencv image using cv_bridge. cv_bridge. Once you have this image, you can do whatever you want with it using OpenCv functionalities. Check the extremely extensive OpenCV documentation and tutorials either in Python Python or C++. C++.