How to select camera for apriltag_detector_node.launch

[Ismael Gimenez]

Hi Bernd,

I have a doubt related to apriltag_detector_node.

If i have a camera recording in real time lets say mycam with topics as : /mycam/camera_info ; /mycam/image_raw ; /mycam/image_raw/compressed

How can i do so apriltag_detector_node tries to detect tags on mycam topics?

Or does it detect mycam topics automatically and use them?

Should i modify apriltag_detector_node.launch so it remaps from other topic?

<remap from="~image/compressed" to="/pg_17274483/image_raw/compressed"/>

to

<remap from="/mycam/image_raw/compressed" to="/pg_17274483/image_raw/compressed"/>

I saw example bag has "/pg_17274483/image_raw/compressed" topic that's where the doubt comes from.

Mycam is an usb camera.

Thank you in advance, Ismael.

[Bernd Pfrommer]

https://answers.ros.org/question/9248/how-do-you-remap-a-topic/

[Ismael Gimenez]

Thank you Bernd,I understand now, I had misunderstood how remap works.