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Warped camera data from a new Gazebo/ROS install [closed]

asked 2015-01-15 20:20:24 -0500

SL Remy gravatar image

updated 2015-01-20 17:37:33 -0500

Hello! I have a fresh Indigo install on 14.04 with Gazebo2 installed from debs:

wget -O - | sudo apt-key add - 
sudo apt-get -y install ros-indigo-gazebo-ros-pkgs

But I'm noticing some odd data from the camera sensor on a hector_quadrotor_demo. I've never run 2.X before and did not notice this in Gazebo 1.9, so I can't say if it's something that is directly related to 2.X or not.

Using (as per suggestion)

DISPLAY=:1 gazebo /usr/share/gazebo-2.2/worlds/

and then

gztopic view /gazebo/default/camera/link/camera/image

I see the following

image description

When the same tool is used to view the image topic for the hector world though, a warped image is seen.

image description

The world file for the hector world is below:

<?xml version="1.0" ?>
<sdf version="1.4">
  <world name="default">
      <ambient>0.5 0.5 0.5 1</ambient>
      <background>0.5 0.5 0.5 1</background>
    <physics type="ode">
      <gravity>0 0 -9.8</gravity>
    <light type="directional" name="my_light">
      <pose>0 0 30 0 0 0</pose>
      <diffuse>.5 .5 .5 1</diffuse>
      <specular>.1 .1 .1 1</specular>
      <direction>0 0 -1</direction>
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Closed for the following reason question is not relevant or outdated by SL Remy
close date 2015-12-08 07:04:32.383804


Can you look in ~/.gazebo/ogre.log for any errors or exceptions? Can you also try disabling shadows (click on "Scene" in the "World" tab, then disable shadows in the property list)?

nkoenig gravatar imagenkoenig ( 2015-01-20 14:04:41 -0500 )edit

Compiler error: unknown error in hector_materials.material(4): token "shading" is not recognized Compiler error: unknown error in hector_materials.material(29): token "lighting" is not recognized Compiler error: unknown error in hector_materials.material(80): token "lighting" is not recognized Compiler error: unknown error in hector_materials.material(96): token "lighting" is not recognized

SL Remy gravatar imageSL Remy ( 2015-01-20 16:35:12 -0500 )edit

Looks like the shadows are already off in the world file though

SL Remy gravatar imageSL Remy ( 2015-01-20 17:40:19 -0500 )edit

If it's easy for you, I'd try using Gazebo4. I'll have to try this with gazebo2 to see if I can reproduce the problem.

nkoenig gravatar imagenkoenig ( 2015-01-21 12:43:14 -0500 )edit

I ran your world file in Gazebo4, and it looked fine. This only means that there is either a problem with Gazebo2, or there is something wrong with your particular setup (hardware, drivers, etc). I'll try gazebo2 next.

nkoenig gravatar imagenkoenig ( 2015-01-21 14:22:32 -0500 )edit

I will try Gazebo4 as well

SL Remy gravatar imageSL Remy ( 2015-01-22 21:53:21 -0500 )edit

Hasn't been as easy as I'd hoped. This is taking a while to iron out the installation steps for Gazebo4 and Indigo

SL Remy gravatar imageSL Remy ( 2015-01-26 13:40:40 -0500 )edit

1 Answer

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answered 2015-01-16 09:13:06 -0500

nkoenig gravatar image

I assume the normal render window looks fine, correct?

Can you try something a bit easier?

  1. Run: gazebo worlds/
  2. When the GUI appears, press CTRL-t to open the topic visualizer.
  3. Select one of the camera image topics, should be /gazebo/defualt/camera/link/camera/image
  4. Does the image look correct? If so, try to fiddle with the environment (add objects, move the camera, etc) to see where it breaks.
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Asked: 2015-01-15 20:20:24 -0500

Seen: 431 times

Last updated: Jan 20 '15