Can't use camera images from turtlebot on the workstation laptop

asked 2013-02-06 00:08:29 -0500

jd
62 ●7 ●7 ●13

I've checked that I can communicate to the turtlebot and from the turtlebot to the workstation. On the workstation, I can check rostopic list and the see camera topic that I want to use. If I try to see the camera image in RViz nothing shows up but it also shows that the topic is there.

If I go onto the turtlebot laptop I can use RViz to see the camera without any problems.

answered 2013-02-06 01:13:25 -0500

Boris

3060 ●32 ●57 ●83 http://people.idsia.ch/~gromov

updated 2013-02-06 01:14:57 -0500

Try to echo the image topic with rostopic echo <camera_node>/image_raw. If there is nothing in return, then there may be a configuration problem.

In this case double-check that ROS_MASTER_URI and ROS_IP environment variables are correctly set on both computers.

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I run

rostopic echo /camera/rgb/image_raw

And I never get any response back from the terminal. But at the same time if I do

rosrun image_view image_view image:=/camera/rgb/image_color

I can see the camera image.

jd ( 2013-02-06 10:44:41 -0500 )edit

Did you check ROS_IP and ROS_MASTER_URI? I had the same issue a while ago and the problem was indeed in these.

Boris ( 2013-02-06 14:41:07 -0500 )edit

I got it working, somehow. Not sure what, if anything, I did though. I have trouble now though with losing the network connection. Shortly after the workstation gets the camera image it just freezes and I can't ssh to the robot anymore.

jd ( 2013-02-06 15:07:43 -0500 )edit

It can be a problem of network bandwidth. Try to use compression -- Transport Hint in Camera plugin in RViz.

Boris ( 2013-02-06 15:29:29 -0500 )edit

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