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connect node topic

kinetic
ROS

asked 2018-10-07 16:33:57 -0500

Shaarkrat
11 ●1 ●3 ●4

Hello!

I think the question was already asked, but I don't get the right answer.

I have a node, publishing a message of type sensor_msgs/Image to a topic. (was already created with the bebop_autonomy packages.) I'm trying to write a node using image_transport tutorial to subscribe to this topic and open the image (video stream) in opencv.

http://image.noelshack.com/fichiers/2...

first question: I've tried to connect my imahe_listener node to the bebop/image_raw topic but it doesn't work.

second question: what is the difference between the nodes who are "inside" tne bebop "box" and the one who is outside?

Thanks for your help Shaarkrat

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answered 2018-10-07 19:08:24 -0500

srikanth262
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For question 1, These ROS Wiki pages might help http://wiki.ros.org/image_transport/T... , http://wiki.ros.org/image_view

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I used the transport tutorial, and change image_transport::Subscriber sub = it.subscribe("camera/image", 1, imageCallback); into image_transport::Subscriber sub = it.subscribe("/bebop/image_raw", 1, imageCallback);

but it still doesn't work. what did I missed?

Shaarkrat ( 2018-10-09 05:36:59 -0500 )edit

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Asked: 2018-10-07 16:33:57 -0500

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Last updated: Oct 07 '18

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