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[mesh manipulation] Generating Mesh from LiDAR data (PointCloud or Surface) |
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January 15, 2012, 18:28 |
Generating Mesh from LiDAR data (PointCloud or Surface)
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#1 |
New Member
Ken Mankoff
Join Date: Oct 2010
Posts: 7
Rep Power: 16 |
Hi,
I'm fairly new to OpenFOAM and just beginning to make my own experiments and meshes. I have data collected with a LiDAR that is in pointcloud format (PLY, PCD). I can convert it easily to a gridded format using the opensource Points2Grid tool. I would like to be able to use this as one wall of my simulation. It does not seem that there is much overlap between the LiDAR and CFD. Has anyone done something similar, or have pointers or know of tools that can take a pointcloud and generate a mesh from it? Thanks, -k. |
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February 1, 2012, 10:53 |
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#2 |
Member
Join Date: Sep 2011
Posts: 45
Rep Power: 15 |
What do you want to do exactly ?
You have coordinates in space corresponding to the points where your Lidar is taking measurements ? And you want to create a mesh from this ? its not clear .. |
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February 1, 2012, 10:58 |
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#3 |
New Member
Ken Mankoff
Join Date: Oct 2010
Posts: 7
Rep Power: 16 |
Correct. I have (x,y,z) triplets in space from LiDAR. I'd like to create a mesh from this.
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February 1, 2012, 11:07 |
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#4 |
Super Moderator
Niklas Nordin
Join Date: Mar 2009
Location: Stockholm, Sweden
Posts: 693
Rep Power: 29 |
if you can convert it to an STL it sounds pretty similar as the snakeriver tutorial.
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February 1, 2012, 11:10 |
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#5 |
New Member
Ken Mankoff
Join Date: Oct 2010
Posts: 7
Rep Power: 16 |
Yes. Any suggestions on free tools that convert point clouds to STL?
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February 1, 2012, 11:33 |
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#6 |
Senior Member
Niels Gjoel Jacobsen
Join Date: Mar 2009
Location: Copenhagen, Denmark
Posts: 1,903
Rep Power: 37 |
Hi
You could try to find a delaunay-triangulation tool. Having the triangles you should be able to write the STL yourself. With a delaunay-triangulation you will also have the best estimate of the surface between the measured points. I believe matlab uses/used qhull, which is an open-source delaunay bundle. Best regards, Niels |
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February 1, 2012, 12:24 |
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#7 | |
Member
Join Date: Sep 2011
Posts: 45
Rep Power: 15 |
Quote:
Why don't you create a mesh around these points, a cube for example, and then refine ? Do you have the topography ? |
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February 1, 2012, 13:41 |
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#8 |
New Member
Join Date: Jun 2009
Posts: 27
Rep Power: 17 |
If you can't find a better tool, there are MATLAB scripts in the web that you can use to convert point data into stl format.
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February 2, 2012, 06:14 |
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#9 |
Senior Member
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February 2, 2012, 07:09 |
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#10 |
Senior Member
BastiL
Join Date: Mar 2009
Posts: 530
Rep Power: 20 |
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Tags |
lidar, mesh conversion |
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