Point cloude

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Gunn
Posts: 4
Joined: Tue Mar 02, 2021 9:17 pm

Point cloude

Post by Gunn »

Hello

I have a point cloude generated from pix4d. It is an fotegrammerty consisting og rufly 1000 picture. Of this I got 768 000 000 points that I segmented a little part aout of. So I only have around 180 000 000 points to work with.

My problem is that the point cloud is cut up in many planes insted of beeing a solid 3D model showing all of the points.
Is there any tric to fix this?
WargodHernandez
Posts: 187
Joined: Tue Mar 05, 2019 3:59 pm

Re: Point cloude

Post by WargodHernandez »

What format are you actually loading?
Are you exporting these in .LAS/GeoTiff from pix4d?
daniel
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Re: Point cloude

Post by daniel »

And it looks like an 'accuracy loss' issue. Have you accepted the 'Global Shift' as suggested by CloudCompare when loading the cloud?
Daniel, CloudCompare admin
Gunn
Posts: 4
Joined: Tue Mar 02, 2021 9:17 pm

Re: Point cloude

Post by Gunn »

WargodHernandez wrote: Tue Mar 02, 2021 11:09 pm What format are you actually loading?
Are you exporting these in .LAS/GeoTiff from pix4d?
I am loading <<las>> file and when Global shift appear I klick <<yes for all>>.
Right now I am running pix4d over again but with using; Image scale: <<1/2 (Half image size, Default)>>, Point Density: <<Optimal>> and Minimum Number of matches: <<5>>.
This will hopfefoully reduce the point clod and make a nicer surface. The probelm with sliched point clod maby dissapear after this process, if not I ask for advise again :)
Gunn
Posts: 4
Joined: Tue Mar 02, 2021 9:17 pm

Re: Point cloude

Post by Gunn »

Hello I use las format that is generated from pix4d.
daniel
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Re: Point cloude

Post by daniel »

And in the "Global Shift" dialog, are there any values in red maybe? (i.e. large "local" coordinates)
Daniel, CloudCompare admin
Gunn
Posts: 4
Joined: Tue Mar 02, 2021 9:17 pm

Re: Point cloude

Post by Gunn »

Hello
Just going to tell that now everything is fine after processing the point cloud once more with new settings that gave me a mutch more nicer point cloud wihtout all the noice and less point then the previous one.
There are now no sliching of the point cloud so I am happy for that.
Thank you all for trying helping mee :)
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