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cv_bridge tutorials not working

asked 2017-07-08 15:45:51 -0600

Allen Ayala gravatar image

updated 2017-07-08 19:15:57 -0600

When running the example code from the cv_bridge tutorial, all I see is a small window that has captured a small portion of my screen, along with terminal output that says init done and some blank space. I ran catkin_make in my catkin_ws and have received no build errors. As you can tell, I am able to run the node but don't receive the normal output. To start connection with the drone I did rosrun ardrone_autonomy ardrone_driver _realtime_navdata:=True _realtime_video:=True _navdata_demo:=1 in order to ensure that the realtime video publishing and Navdata were enabled for the drone. I also ran the stated command without the extra parameters. I am using OpenCV 3.2 with the Parrot 1 AR drone and am currently using ROS Kinetic on a Ubuntu 16.04 machine. However when I execute rosrun image_view image_view image:=/ardrone/front/image_raw, I can see the camera feed. Any help is appreciated.

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answered 2017-07-24 08:30:42 -0600

rosberrypi gravatar image

Just for the record and people having the same issue I'm adding this comment. I was also having problems following that tutorial so I've changed the topic name to /usb_cam/image_raw so it works now!

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answered 2017-07-08 20:40:08 -0600

Allen Ayala gravatar image

I am now able to receive camera feed along with the OpenCV drawn circle. To fix the issue, I changed which topic the subscriber (image_sub_) was subscribed to: from /camera/image_raw to /ardrone/image_raw. Could this change have a significant effect on vision processing?

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The topic names are kind of address names or lookup so shouldn't affect on vision processing.

naveedhd gravatar image naveedhd  ( 2017-08-02 09:17:09 -0600 )edit

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Asked: 2017-07-08 15:45:51 -0600

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Last updated: Jul 24 '17