compute Normals frozen

[mashal]

I have point clouds in .e57 , .pts and .xyz formats. I want to convert it into mesh now the problem im stuck is evrytime I try to compute Normals using .pts format it got stuck. Im setting the radius to 0.345 and local surface model as plane and spanning option to k=6 can anybody guide me what Im doing wrong?

[daniel]

How big is the cloud? And what are its units?

[mashal]

The size of .e57 file is 1.9 GB and .xyz , .pts is 6.5 GB I also had a .pod file too which Im not sure how to utilize it? and I was able to compute normals by unchecking the orientation options but the mesh was not very good. Actually the scene is about a bridge and there are trees and some hosues as noise. So I am now trying to remove the noise using the Noise filter. but the cloudcompare often freezes whenever I try to remove noise or compute normals. is it because of RAM?

[daniel]

So yes, it's probably because of the size of the cloud (actually only the number of points matter).

And even if it freezes, you could let it process (slowly) the cloud. CC uses all the CPU power for some computations, and this prevents the GUI from being refreshed. It's just that with big clouds, you have to wait much longer (e.g. go grab a coffee, or even better, launch the computations during the night ;).

Another option to make things go faster is to use the command line mode.

[mashal]

Hi Daniel thanks for reply. could you please tell me what would be good approach in my scenario. I actually want to upload 3D data on skectfab https://sketchfab.com/ and my pointcloud are quiet big. so I though to make the 3D model of that but Im not sure if it reduces the size or not. what you suggest ?

[electrongap]

I was running into similar issues. For me, through trial and error I noticed it was when I had clouds that had a few points far away from the main area of the scan. I used the Segment tool to crop my scan to the main area and normals computed a lot quicker.