Unrolling a tunnel

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JohnMMeyer
Posts: 2
Joined: Thu Sep 28, 2017 12:34 am

Unrolling a tunnel

Post by JohnMMeyer »

Hello,
I am trying to unroll a tunnel in which I have collected point cloud data using a mobile robot. The problem is that the tunnel is very irregular and is not straight. I have been looking through the help comments and these seem to be the most relevant:


Unroll - Parabolic
http://www.danielgm.net/cc/forum/viewto ... roll#p5500


Texture of collapsed towers
viewtopic.php?t=1417#p5456


unroll texture
http://www.danielgm.net/cc/forum/viewto ... roll#p3820

That being said I am not getting great results. Any suggestions would be most appreciated.

Thank you,
John
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Tunnel_Section_2.jpeg
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Tunnel_Section_1.jpeg
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daniel
Site Admin
Posts: 7332
Joined: Wed Oct 13, 2010 7:34 am
Location: Grenoble, France
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Re: Unrolling a tunnel

Post by daniel »

Wow, this is going to be hard... frankly I don't see how to handle this case :(
Daniel, CloudCompare admin
JohnMMeyer
Posts: 2
Joined: Thu Sep 28, 2017 12:34 am

Re: Unrolling a tunnel

Post by JohnMMeyer »

Oh Sweet!!! Do I win a prize since I stumped you? :{)

Like I said, I think creating a polyline is the best way to go, but I have had little luck.

Thanks for your software though, it is great and is a real contribution to a lot of people. I used to to upload .pcd files from a ROS equipped robot, clean up the point cloud, make the mesh, and export it as a .las. All of that super helpful to me and my research.

I will let you know if I come up with something.

Thanks,
John
paddywhells
Posts: 2
Joined: Tue Jun 04, 2019 5:59 pm

Re: Unrolling a tunnel

Post by paddywhells »

I have a similar project, but with lava tubes. Cutting the tube or cave into segments worked well. Find segment that are most like a cylinder and treat them separately.
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