CloudCompare forum

Hello All,

I am trying to export the intensities of a number of picked points to ASCII, but it only exports the x y z coordinates. Is there any other way to do this?

Thank you!

-Sarah

I guess you are using the 'Point List Picking' tool? Then indeed, this tools only exports the points coordinates.

There's only two other options (and I fear not very nice ones ;):

• use the 'Segmentation' tool (scissors icon) to keep only those points (quite hard ;)
• use the 'Point List Picking' tool to create a new cloud, then compute the distance between your original cloud ('compared') and this new subset ('reference'). Don't forget to set a very low 'max distance' (slightly above zero) before computing the precise distances, otherwise the computation may take a lot of time. Eventually, you can use 'Edit > SF > filter by value' on your original cloud and select only the points with a zero distance. On the resulting cloud - which should count as many points as the picked ones - you can remove the 'Cloud-2-cloud distances' scalar field (all the other scalar fields should be present as well).

Hope it helps,

Hi Daniel,

Thanks for the reply. The second one works nicely. I am taking a number of sample points representing two different classes (ground and vegetation) at various distances to see if I can get an idea of the impacts of distance on laser scanned intensity for the two different classes in my cloud. Initially, I was just manually typing in excel the values of each individual picked point, but I want to collect over 600 sample points (and in the future, maybe more, as I am starting with 5 m intervals, but I think 1 m intervals is probably more appropriate). Anyhow, thanks for the advice.

Kind regards,

-Sarah