CloudCompare forum

I need to subsample a cloud before computing normals. When I subsample the cloud it becomes a separate object and loses the associated TLS/GBL sensor. Thus, when I go to compute normals on the subsampled cloud, the option to use sensor is grayed out. How can I copy the associated TLS/GBL to the downsampled cloud??

Have you tried with the latest 2.13.alpha version? This new version should now copy the sensors and other things when subsampling.

Hi Daniel,

I have downloaded the latest 2.13.alpha 11/24/2022 release. Still, when I subsample the original cloud the sensor settings do not carry over. I need to subsample the cloud to around 1M points prior to computing normals so that CC doesn't get hung up forever. I did find a work-around by creating a new sensor and finding the transform to input from the old sensor.

By "subsampling", are you really referring to the 'Tools > Subsample' tool? (because I tested on my side, and it works (and for all three ways of subsampling). Or are you referring to the 'Edit > Octree > Resample' method maybe?

Hi Daniel,

Yes, I am talking about the subsampling tool. What is that other child with the paintbrush next to it in your tree? Could that have something to do with it?

No that's an image, and they are copied as well when segmenting or subsampling a cloud (as well as other types)