Documentation updated here!

@Hyosun-Yoo said in [yocto:/# roslaunch voxl_cam_ros tracking_slave.launch] Error Message ?:

Re: AprilTag Relocalization

Dear
I got an error message when I run this command.

[yocto:/# roslaunch voxl_cam_ros tracking_slave.launch]

Please tell me how to solve this message.

VOXL Vision (modalai-3-2-0-0.3.4-b.tar.gz)
VOXL Vision PX4 Apriltag Relocalization error

Error message

ERROR: could not open camera subscriber for cam id 1
[ERROR] [1034.046473200]: CameraManager::Initialize() failed
[ERROR] [1034.046845023]: Unable to open camera.
===============*
5c2c6beb-9c8b-432b-8430-fcc4d81c1ef3-image.png

Thank you so much.
Mr. Yoo, hyosun

@iparra have you read through the documentation on how to configure the tags? https://docs.modalai.com/voxl-tag-detector/#voxl-configure-tag-detector

@Alex-Kushleyev yes seems like it, thank you!

Spot on @Matt-Ooi - the voxl2 is natively meant to handle transformations for ardupilot and px4 - BUT you are using MAVROS which is a different tranformation all together - hence why you would have to do the transofmratio yourself before sending into the flight stack running ardupilot (aka when calling mavros offboard) or something

yes, that's the correct rotation matrix for a tag on the ground.

For a tag on the wall with a center 1m off the ground you can use:
"T_tag_wrt_fixed": [0, 0, -1],
"R_tag_to_fixed": [[0, 0, 1], [1, 0, 0], [0, 1, 0]]

The second video of this docs page walks you through the voxl-vision-hub command line args to help you debug relocalization.

@Amin-Bassiri could you please someone answering my question.