Noises

[kozolins]

Hi!
I have made point cloud from historical satellite images (Corona), but there are different size of "noises" with extreme low height values (because of cloudiness). I tried noise filtering feature, but the result is quite similar to original point cloud and noises still exist. I tried filtering with 15, 30, 50 and 100m radius. Image resolution is 2m. Maybe someone can help?
Kriss

[daniel]

Could you post a snapshot of your point cloud maybe?

[kozolins]

Yes, so this is how point cloud and DEM looks:

DEM.PNG (299.63 KiB) Viewed 8012 times

The attachment DEM.PNG is no longer available

[kozolins]

Point cloud.PNG (352.76 KiB) Viewed 8012 times

[daniel]

And where is the noise? Can you show the cloud from the side maybe?

[kozolins]

Hope you can understand from this - on the right side are negative values.

side.PNG (15.66 KiB) Viewed 7950 times

[daniel]

Hum, I fear the noise is too dense and 'attached to the cloud'...

You could of course remove the points with negative Z easily, but I bet it's not that easy?