Robotics StackExchange | Archived questions

ar_tag_alvar frame not found

Dear ROS users, I'm using artagalvar, starting from example launch file already in the package. When launching, I get Frame id / does not exist!, despite I set in the launch file. Thank you very much!

Asked by Rahndall on 2014-09-10 05:33:15 UTC

Comments

when a tag is recognized, the node is not able to set the parent frame: /ar_marker_4_corrected exists with parent NO_PARENT.

Asked by Rahndall on 2014-09-10 05:39:39 UTC

Open up rqt and check the transform-tree, sounds like you have unconnected trees

Asked by Rabe on 2014-09-10 07:13:51 UTC

the transform-tree seems correct. Furthermore, it seems a problem related to the camera: using another device connected to PC it works. Could it be a problem on camera setting? I'm using gscam to gather stream from a commercial webcam

Asked by Rahndall on 2014-09-10 08:07:36 UTC

the problem was on Image topic, where frame_id of header was not set. Thank you for your support!

Asked by Rahndall on 2014-09-15 04:59:38 UTC

Answers