Removing overlapping point cloud

[hannahkh22]

If i have 2 point clouds of the same area. e.g. say a road
1) A empty road.
2) A road with cars on it.

Is there a way of using Point cloud 1 to remove points from point cloud 2 that overlap so i am only left with the cars.

There will probably need some kind of threshold parameter as no 2 point cloud are perfectly aligned...

(I know i could do this manually but for huge city wide areas etc this could take forever!)

[celegante]

You should be able to compute the cloud to cloud distance and cars should have higher values. Than you can use filter by value to segment the cloud.

There is also a CSF plugin that can be used to separate on-ground and off-ground points, if the cloud to cloud distances don't d what you want.