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Questions tagged [markers]

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Are there ROS2 fiducial markers

I have not been able to get any marker nodes to build for Humble. The ones I've tried are riddled with depreciated OpenCV code.
Alan Federman's user avatar
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Rviz not displaying marker on first call of publish(marker)

Using the attached code for some reason the marker does not appear with the first call of publish() without a small delay inserted. If I echo the visualization_marker topic without the delay it does ...
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How to position lighting and remove shadows in ros3djs?

When I display markers using ros3djs they appear to be darker than they do on my default RViz setup. It seems my issue is ...
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1 answer
8 views

RViz marker coordinate space

Hi, I was wondering what coordinate space RViz markers work in (Pose or Points parameters). I have an object with Pose of 5000, 5000, 0, however when I open RViz and draw a Marker with 0, 0, 0 ...
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Flaw with compute3DCentroid and getMinMax3D

Hey everyone, I'm using the "standard" way of creating bounding boxes for a point cloud cluster, which most resources online are using. My code posted below. However it seems there is a flaw ...
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1 answer
100 views

RViz text marker doesn't display

I am successfully using various types of visualization markers, but can't get TEXT_VIEW_FACING to work. RViz is subscribed to the topic, and the message content seems ok. RViz isn't showing any errors....
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1 answer
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publish() to a closed topic when publishing a marker

Hello guys! I am trying to subscribe a message (/position) and publish a marker. The message(/position) contains series of (x,y,z) as below : ...
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1 answer
4 views

Visualising the real time trajectory path using markers

I'm trying to publish a list of markers, based on the data from the msg subscribed. I'm not able to visualise it, though I change the marker Ids! Thanks in advance! ...
Pradheep Krishna's user avatar
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1 answer
7 views

Issue with rviz:Markers Sending Basic Shapes (C++). Running "rosrun using_markers basic_shapes": "Please create a subscriber to the marker"

1.my rosdistro: indigo; my ros workspace is catkin. 2.my tutorial:link text 3.and then when i run :rosrun rviz rviz, it come up with nothing in my rviz, like this picture:no fixed frame, no shape on ...
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1 answer
11 views

ROS Indigo - rviz maker turned white after update

After latest update of ros-indigo-moveit and rviz, the markers (which had red and blue colors before) turned white. Originally posted by dhindhimathai on ROS Answers with karma: 136 on 2017-07-04 ...
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1 answer
5 views

How to show multiple LINE_STRIPs?

I want to show the boundaries of the road. The boundary has many points, I use LINE_STIP to do this. But as the road has two boundaries, although I give them different id, RViz still connect the end ...
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1 answer
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setting marker for given period time fails

I am trying to visualize a specific marker for few period of time, but when i try this code it shows error: ...
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1 answer
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Draw on a map with mouse

I'm looking for a user to demonstrate trajectories on a map. I'm using RViz for everything, so an RViz would be excellent but other options are ok too. The map is coming from ...
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1 answer
16 views

Tutorials-Markers: Do not overwrite last marker

I try to have mulitple markers via several publishes and then let them fade away if their lifetime is over. Unfortune if I publish a new marker the old marker disappears before its lifetime is up. I ...
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1 answer
12 views

Convert ros markers into pcl or mesh

Hi. I am a newbie in ROS. Recently, I start working on the SLAM method(developed by someone else ). I have a node which publishes to the topic /Map. The messages are of type: visualization_msgs/Marker....
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2 answers
8 views

Quaternion of a 3D vector

My drone is to reach position x,y, z and orient itself along vector3D (ax, by, cz) wrt origin. In order for me to visualize this on rviz I must represent them in quaternion form. I understand that ...
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2 answers
22 views

rviz doesn't visualize the Markers

Hello ! I am learning currently to use Point and Line Markers by the tutorials. And, I am confused what it is a mistake in my code, because there were not any errors in the compilation. My ...
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1 answer
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working with Markers

The solution of my problem is beneath. Hi guys, before I posted this question, I did this tutorial about markers: http://wiki.ros.org/rviz/Tutorials/Markers%3A%20Points%20and%20Lines (Thank you for ...
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1 answer
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Do marker namespaces and ids actually do anything?

I am having trouble understanding the purpose of namespaces and ids as applied to markers. I am specifically referring to some of the info provided on this wiki page. It says that if a marker has the ...
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1 answer
6 views

Unable to display Mesh as an interactive marker

I want to use a mesh as a marker. To do that, I changed basic_controls.py to : ...
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1 answer
3 views

people detection / tracking (wg_perception) on indigo: easy_markers dependency

It seems that Indigo's Perception package (people detection and tracking) requires dependency: easy_markers. (two other dependencies, ros-indigo-bfl and ros-indigo-costmap-2d exists and are good). ...
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1 answer
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Sematics of ARROW marker parameters changed between fuerte and hydro?

Dear all, I am currently porting some code from fuerte to hydro and came across a problem that I do not fully understand. In fuerte I used the arrow marker, and there the length of the arrow is ...
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Interactive Markers Teleop (groovy) has rviz error and doesn't work

Hi all, I have a turtlebot 2. I roslaunch "turtlebot_bringup minimal.launch" on turtlebot and configure the network as http://wiki.ros.org/turtlebot/Tutorials/groovy/Network%20Configuration. ...
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1 answer
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Accuracy of AR markers tracking without depth data improvements?

Hi, I have been using the individualMarkers node from the ar_track_alvar package successfully. With the individualMarkersNoKinect however, the detected markers are about 5 cm 'below' the right ...
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1 answer
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Faster ar_track_alvar

I'm playing around with ar_track_alvar package. I use it both to initialize amcl and to localize the docking station. It works fine, but is a terrible CPU-hunger. I have changed the code to limit its ...
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1 answer
3 views

Visualization Marker + Serializable

Hi there, I am trying to write visualization markers (import visualization_msgs.Marker) onto a file however I get an error - and I believe the error is because Marker does not implement Serializable. ...
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1 answer
11 views

How to remove the shade of markers in rviz?

Hello everyone. I am visualizing about 100000 marker points in rviz. Due to the shade (or shadow) of markers and small size of points, the color of points is not clearly visible. Is there any way to ...
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2 answers
64 views

Add markers to markerarray in c++

Hi all, I am trying to add markers to a markerarray but i am unable to find the line of code that has to be used for this. Ot is probably pretty simple but I am inexperienced with c++ and ros. Thank ...
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1 answer
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ar_toolkit Marker

Are there anywhere finished standard markers for the ar_toolkit to download and to print? Originally posted by Janina on ROS Answers with karma: 11 on 2012-05-14 Post score: 0
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1 answer
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ROS Answers SE migration: markers python

Hi! I need to add in rviz a marker from a python code. The thing is that I have a ekf map based localization written in python and it is using matplotlib, but I want to plot everithing on rviz, so I ...
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1 answer
4 views

Cannot visualize markers in rviz!

I use openni_kinect and openni_tracker to track with kinect. Then, when a user is detected I can see the /tf in Rviz and it works. However, when I try to use markers (eg. hone_markers, ...
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