Subsample .e57 cloud and then estimate normals with sensor

[Evan]

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??

[daniel]

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

[Evan]

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.

Capture.PNG (27.16 KiB) Viewed 2329 times

[daniel]

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).

subsampling.JPG (24.1 KiB) Viewed 2302 times

Or are you referring to the 'Edit > Octree > Resample' method maybe?

[Evan]

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?

[daniel]

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