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In order to use camera_info_manager, you must:

• include the camera_info_manager.h header
• declare a pointer to an instance
• allocate an instance of the CameraInfoManager class
• set the camera name
• validate and load previous data from a URL
• get the current camera_info when publishing each image frame

There is not a lot more to it than that.

In order Camera info manager will declare that service for you. The "tutorial" is just a link to the first driver that used camera_info_manager, not entirely self-explanatory.

To use camera_info_manager, you must:

• include the camera_info_manager.h header
• declare a pointer to an instance
• allocate an instance of the CameraInfoManager class
• set the camera name
• validate and load previous data from a URL
• get the current camera_info when publishing each image frame

There is not a lot more to it than that.