Sparse Point Cloud exported as PLY shows many “floating” noise points in CloudCompare, but not in RealityScan — why?

[biabiabia66]

Hello everyone,

I have a follow-up question related to Sparse Point Cloud export in RealityScan v2.1.

Problem description

• I export the Sparse Point Cloud from RealityScan (ALIGNMENT tab → Export → Sparse Point Cloud).
• The exported file format is PLY.
• When I open this PLY file in CloudCompare, I see many obvious “floating” or “airborne” noise points far away from the main structure.
• However, when I view the sparse point cloud directly inside RealityScan v2.1, these noise points do not appear to be visible (or are much less noticeable).

This leads to two questions:

1. Why do these noise points appear in CloudCompare but not in RealityScan?
2. What is the correct or recommended way to remove these noise points?
   
   
   
   
   

[OndrejTrhan (otrhan)]

Hi
In RealityScan not all points are shown in 3D view. There is also no way how to delete those there.

You’ll need to use some fuctions in CloudCompare to remove such points.