Select subset of points depending on cloud/cloud distance

[darkdrake]

Hi,
I have two similar point clouds with 3.000.000 points: the second one has some differences, something like 100.000 points randomly displaced.
For example, I have the first point cloud of a city, with buildings, and the second one has the same city, with some missing buildings.
What I need to do is to highlight and select the differences between this two point clouds.
I see that, using ICP for registration and computing Cloud/Cloud distance, I can highlight these zones. But.. How can i get the location (x,y,z) and color (r,g,b) of the highlighted pixels?

Basically, I wish to want:

- distances from first cloud points to the second one (in order to manually select the points with distance below certain threshold)
- the subset of the pointcloud with the points that are different

Is it possible?

Thank you in advance for any advice.

[daniel]

You can interactively 'highlight' the points within a range of distances (see the section 'Scalar field display parameters editor' here: http://www.cloudcompare.org/doc/wiki/in ... properties). And you can also extract the corresponding points with http://www.cloudcompare.org/doc/wiki/in ... r_by_Value.

[darkdrake]

You can interactively 'highlight' the points within a range of distances (see the section 'Scalar field display parameters editor' here: http://www.cloudcompare.org/doc/wiki/in ... properties). And you can also extract the corresponding points with http://www.cloudcompare.org/doc/wiki/in ... r_by_Value.

Thank you, very helpful. Your work is great.

Is it also possible to do it by command line?

[daniel]

If you already know what is the range of distances you want to select, then yes: http://www.cloudcompare.org/doc/wiki/in ... _line_mode