Hi Josh,
I have noticed the point_cloud_converter before sending the question. I also have visualized the point cloud as point markers, it works, but that's not a good way in my mind.
When I use the conversion node, there is another problem, I got an WARN message as following:
[ WARN] [1274800021.152142366]: MessageFilter [target=/ ]: Discarding message from [/point_cloud_converter_1274799273635604858] due to empty frame_id. This message will only print once.
And then I can see nothing in rviz. Could you please give me a suggestion to overcome this. Thank you!
Junhao