pointcloud to a Mesh, converting a pointcloud to a usable mesh |
pointcloud to a Mesh, converting a pointcloud to a usable mesh |
Aug 23 2014, 01:18 AM
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#1
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
First ,I am by no means an expert on this so....
MeshLab is designed for working with pointclouds from optical images or a laser scanner or a lidar or any tool that outputs a pointcloud including ASP ( Ames Sterio Pipline) and "bundler" Bundler is what i used for the 67p giff to pointcloud -- see the 67p thread -- post 212 http://www.unmannedspaceflight.com/index.p...st&p=212227 the software is here http://www.cs.cornell.edu/~snavely/bundler/ https://github.com/snavely/bundler_sfm ( there are a few different forks of this code including "OSM-Bundler" ) bundler outputs a "bundle.out" file there IS a Blender import tool for them "import_bundler.py" http://koelzk.crispy-cow.de/article/9/impo...enes-to-blender remove everything but the pointcloud from the scene ----------- on to the pointcloud ---------- a view of a " just ok " PC of Comet 67P in Meshlab http://meshlab.sourceforge.net/ The current version is 1.3.3 now this program is in rather slow development so most of the online guides are for 1.3.2 or 1.2 http://sourceforge.net/projects/meshlab/files/meshlab/ and some of the tools and menu items HAVE changed unfortunately there is really nothing to see in meshlab for adding a "skin" to a PointCloud ( PC) and they are a TON of tools and options and every mesh is going to be a bit different a very orderly one that is GRIDDED DATA will need different settings that a disorderly one like the above image of 67p see google , this is a good but brief post http://gmv.cast.uark.edu/scanning/point-cl...esh-in-meshlab/ and this one from "makerbot" and 3d printing http://en.wikiversity.org/wiki/MakerBot/Cl...For_3D_Printing step one import the mesh into meshlab ( file / import mesh ) step two add normals ( "filters / Normals , curvatures and orientation / Compute normals for pointcloud" ) Step three add a skin --- there A LOT OF OPTIONS !!! -- just take a look at ( Filters / remeshing, simplification and reconstruction ) i used a poison noise option - surface reconstruction : Poisson ( Filters / remeshing, simplification and reconstruction /surface reconstruction : Poisson ) -- octave tree 10 -- solver divide 8 -- surface offset 0.8 for other types of PC's it would be a good idea to read through some google search results the number of options in MeshLab is rather DAUNTING |
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Oct 14 2014, 05:39 PM
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#2
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Member Group: Members Posts: 241 Joined: 22-August 05 From: Stockholm Sweden Member No.: 468 |
poisson I find the poisson reconstruction to be almost useless when handling a sphere-like surface. It is intended for surfaces that are mostly flat-ish. My pointclouds are very dense, many millions of points, so I had to find a fast efficient algorithm. The VCG surface reconstruction works well for me. It is intuitive and fast. |
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