compare scans

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Ingsayyad
Posts: 97
Joined: Fri Oct 25, 2013 9:17 am

compare scans

Post by Ingsayyad »

I need to comapre two scans.
I 'm getting strange results. Infact there shouldn't be any difference between these scans.
  • Why I 'm getting rings around scanner stand positions.
    What is best way to compare these scans.
    How can I uploadscans files *.bin (30MB) for others on this forum to test it.
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CC_01.JPG
CC_01.JPG (93.96 KiB) Viewed 4381 times
daniel
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Re: compare scans

Post by daniel »

Interesting.

Looking at the shape of these rings, I doubt this is a bug or a numerical artifact. Maybe something in your measurement process?

However I'm very interested in the dataset: you should share the files with Google Drive or Dropbox if you have an account. Otherwise I can give you an ftp account on CC's website.
Daniel, CloudCompare admin
Ingsayyad
Posts: 97
Joined: Fri Oct 25, 2013 9:17 am

Re: compare scans

Post by Ingsayyad »

How can I share it with googledrive. I need ur email or????????????. Data set is in my googledrive.
daniel
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Joined: Wed Oct 13, 2010 7:34 am
Location: Grenoble, France
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Re: compare scans

Post by daniel »

In Google drive, just right click on the file and select Share > Share... (you can either change the rights to public or invite specific people with their emails).
Daniel, CloudCompare admin
Ingsayyad
Posts: 97
Joined: Fri Oct 25, 2013 9:17 am

Re: compare scans

Post by Ingsayyad »

daniel
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Posts: 7707
Joined: Wed Oct 13, 2010 7:34 am
Location: Grenoble, France
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Re: compare scans

Post by daniel »

Thanks for the dataset.

And I confirm that the ripples are already present in the data (you can see them directly after loading the data, even without computing any distances):
cc_pktwolke.jpg
cc_pktwolke.jpg (205.58 KiB) Viewed 4300 times
When you make a slice of one of the cloud and multiply the z scale by 10 you can clearly see the oscillations:
Zoom x10
Zoom x10
cc_pktwolke_slicex10.jpg (19.13 KiB) Viewed 4300 times
It must come from the measurement process. However I won't be able to help you much more as I'm not an expert in the scanning process. Maybe you could ask to the manufacturer?
Daniel, CloudCompare admin
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