ROS Resources: Documentation | Support | Discussion Forum | Index | Service Status | Q&A
Ask Your Question

How exactely build walls from gray-scale image?

asked 2011-05-30 20:07:25 -0500

Kike gravatar image


I'm trying already since days to build my own office! But when the walls should be launched, gazebo simply get stucked. No errors, about not finding the map, etc. Just get stucked. And I didnt find anything in this or any forum about this particular problem.

Following things I have done: I use as template the files how the willow-garage office is made (gazebo_worlds pkg) (wg_world.launch, wg_walls.model etc). In wg_walls.model I just changed in the image-tag the willowMap.png to the name of my picture. My picture is a png-pic, same size as the willowMap.png, located at gazebo_worlds/Media/materials/textures. I tried to rebuild the pkg, rebuild gazebo, and what ever i thought is some how connected to it (removed all ROS_NOBUILDs). Because what I still wonder is, that my picture does not get exported in the share/Media... folder of gazebo! Than I even copied it there by hand, but I think it is not the problem, cause I dont get an error like "image not found"

I created the picture b/w, converted it to grayscale with: a) Ubuntu-cmd: convert -type Grayscale input-picture.png output-picture.png b) Matlab to creat the grayscale picture So I am quite sure that it is in gray-scale format! (1 layer, 0 - 255)

And i waited some minutes, but the map is just a square for testing, so the triangulation, whatever is done in background, can not take that long!

I have really no idea left, what I do wrong? thanks for your help :)

edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted

answered 2011-06-06 03:07:18 -0500

nkoenig gravatar image

Try these things:

1) Make sure the image type is correct:

$ identify <your_image.png>

The output should look like:

willowMap.png PNG 513x513 513x513+0+0 8-bit PseudoClass 256c 3.41KB 0.000u 0:00.000

2) The location of the willowMap.png that is used by gazebo is:

edit flag offensive delete link more


thanks! it's working now! still have no idea why exactely, but managed to create my own package with own maps.
Kike gravatar image Kike  ( 2011-06-08 08:37:35 -0500 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Question Tools


Asked: 2011-05-30 20:07:25 -0500

Seen: 1,151 times

Last updated: Jun 06 '11