Could this be used with real time data?

[dejongyeong]

Hi, I would like to know does this package work if I doesn't use rosbag? I'll launch camera and velodyne in different terminal that publish the require topic as mentioned in the README.md.

Thanks.

[heethesh]

Yes it should work, you can still launch the GUI and pick (and save) corresponding 2D/3D points. Make sure the camera is calibrated and camera_info topic is updated properly with the new parameters.

[dejongyeong]

Hi @heethesh, thanks for getting back to me, do I need to save the calibrated YAML file? I used the camera calibrator from ROS to calibrate the camera.

[heethesh]

Yes, if you save it in /home/.ros folder (not sure) - which is the default save path, I believe ROS will automatically pick the data from here for a given camera name. You can double check by running rostopic echo on the camera_info topic in the terminal.

[dejongyeong]

Ok @heethesh Thanks for the information. I'll give it a try and see how it goes. I might need some pointers if I have some difficulties. Thanks.

[heethesh]

No problem, you may want to update the point-cloud visible ranges for the GUI here. Working on a new update that uses Rviz GUI instead of Matplotlib which should be more convenient to work with.

[dejongyeong]

Ok. I'm new to ROS and will look into details once I got that to work. Thanks.

[dejongyeong]

Hi @heethesh, one quick question that I would like to ask, does it work for LiDAR 32 channel?

[heethesh]

yes it should work