no image received in rviz (turtlebot sim)

asked 2014-11-13 06:16:22 -0500

turtlebot_lille
21 ●1 ●1 ●3

updated 2015-10-26 18:51:48 -0500

tfoote

58457 ●128 ●550 ●526 http://www.ros.org/

Hi everyone,

I have just started with Ubuntu, ROS and Gazebo so I really do not know much yet. However, I really want to learn as much as possible and as fast as possible so please help me.

I am going through the tutorials for the turtlebot simulation on Gazebo after going through the tutorial from gazebosim. I can make the robot move with the command but I am having issues with the RViz parts. In the first tutorial, when I open RVIZ, to visualize my world in Gazebo, I have a warning for the image. It displays no image received. I can still see the obstacles added to the world with the point cloud. Do you know why I am not receiving any image?

USing Hydro and gazebo 1.9

Thanks

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answered 2020-04-02 14:36:24 -0500

Shivendra
23 ●1 ●3 ●5

This is specific to Turtlebot3. The 'burger' model doesn't have a camera whereas the 'waffle_pi' does. I had to reset the model to waffle_pi to get all the camera related topics.

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Thank you for this! I wish this information was included in beginner tutorials on Turtlebot3.

trunc8 ( 2020-07-03 09:52:25 -0500 )edit

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answered 2015-10-27 01:20:03 -0500

nampi
77 ●4 ●6 ●10

tfoote, thanks for your answer. I had the same problem and used your advice.

Firstly, I'd like to add more detailed answer.

Edit the parameter "Image"->"Image Topic" to possible value (for example, "/camera/rgb/image_raw"). You can find possible values click on the drop-down list on the "Image"->"Image Topic". It works only for this session.

If you want to make changes to all sessions, edit this parameter in the config: robot.rviz. You can find the path in File->Open Config. In robot.rviz find "Class: rviz/Image" and edit "Image Topic".
Secondly, I'd like to add other decision. You can use current Topic (at least "/camera/rgb/image_rect_color"). Install "openni" and launch it:
1. sudo apt-get install ros-indigo-openni-launch
2. In a new terminal execute: roslaunch openni_launch openni.launch load_driver:=false depth_registration:=true

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@nampi Thanks for digging in. Could you look at submitting it upstream to the turtlebot_interactions repo. There might be some discussion about how to make it work for both simulation and the real robot but we should make it compatible for both.