SoliForum - 3D Printing Community — Noise removal, and cleanup

Re: Noise removal, and cleanup

null@example.com (Vinoh) — Tue, 15 Sep 2015 04:14:47 +0000

Pirvan, After using your coupler to stabilize my turntable and your tutorial to tweak my scans, I feel like I finally have all the pieces in place. Meshmixer is indeed an excellent tool for refining the scans. Here is a link to my rescanned and reprocessed Hummel on Sketchfab: https://skfb.ly/GQDF

Thanks for all your help!!

--Dave

Re: Noise removal, and cleanup

null@example.com (pirvan) — Thu, 10 Sep 2015 19:46:14 +0000

Take a look at the tutorial I did the other day, which explains in more detail what needs to be done.

http://www.soliforum.com/topic/12264/fr … -tutorial/

Also, I can see in the image you posted that there is still a lot of noise (stray points) in the model, especially at the base. Those inflated mesh pieces that go around your model are probably from those spray points.

How did you clean your model? Did you clean the point cloud, or did you clean the mesh? You need to clean the point cloud.

Anyway, take a look at the tutorial, and try again.

Re: Noise removal, and cleanup

null@example.com (rtr989) — Thu, 10 Sep 2015 16:21:11 +0000

pirvan wrote:

Did you clean up all the tray noise from around the model?
What values did you input in the Compute Normals box for Neighbour Num and Viewpoint Position.
In the Surface Reconstruction dialog box, what values did you use for Octree and Solver?

i clean noise. all values you can see on my pictures, all by default...

Re: Noise removal, and cleanup

null@example.com (pirvan) — Thu, 10 Sep 2015 14:00:59 +0000

Did you clean up all the tray noise from around the model?
What values did you input in the Compute Normals box for Neighbour Num and Viewpoint Position.
In the Surface Reconstruction dialog box, what values did you use for Octree and Solver?

Re: Noise removal, and cleanup

null@example.com (rtr989) — Thu, 10 Sep 2015 06:35:00 +0000

pirvan wrote:

In this photo, the first image (from the left) is the point cloud. I didn't do any poisson-disc sampling, because I wanted to use all the captured detail, so I simply duplicated the original. I then applied the Compute Normals for Point Sets (second image) which aligned all the vertices coherently. After this I used the Poisson Surface Reconstruction to generate the mesh. Not too bad. It still needs some work, which I'll probably do in MeshLab or MeshMixer.

Hello Pirvan!
I try to make my model and I stumble on the first step. I do Compute Normals for Point Sets then Poisson Surface Reconstruction to generate the mesh and i gets some trash..

what i do wrong?

Re: Noise removal, and cleanup

null@example.com (Vinoh) — Thu, 10 Sep 2015 03:46:35 +0000

pirvan wrote:

That's what I'm talking about, nice work.
Now get that little guy on MeshMixer and fix those few things.

haha. Tomorrow is another day. Here is a link to the actual result on Sketchfab. Hopefully, I'll be updating it soon.

https://skfb.ly/GQDF

Thanks again.

Re: Noise removal, and cleanup

null@example.com (pirvan) — Thu, 10 Sep 2015 03:31:32 +0000

That's what I'm talking about, nice work.

Now get that little guy on MeshMixer and fix those few things.

Re: Noise removal, and cleanup

null@example.com (Vinoh) — Thu, 10 Sep 2015 03:14:16 +0000

Your tutorial did the trick, pirvan! After tweaking my scanner dimension settings and calibrating as you suggested with a checkerboard pattern, I followed your Meshlab tutorial to the letter. Without even processing further in MeshMixer, I'm starting to get some decent results. Thanks so much for all the effort you've put into sharing what you learned. Here's what I did, fwiw:

Re: Noise removal, and cleanup

null@example.com (Vinoh) — Wed, 09 Sep 2015 05:13:02 +0000

I tried to follow the info in your "Getting good scans" thread but I got lost between how you learned about the issues vs what you ended up with. A tutorial to bring together the conclusions and advice would be much appreciated! Thanks.

--Dave

Re: Noise removal, and cleanup

null@example.com (pirvan) — Wed, 09 Sep 2015 04:47:48 +0000

Yes, technically the PLY file, as created by FreeLSS, contains a actual mesh, however, that mesh is pretty rudimentary, and is not suitable for printing. Additionally, that mesh is based on a point cloud which more often than not contains a lot noise, and missing parts (areas which the laser couldn't see). So for all intents and purposes, that mesh is useless, and I simply ignore it.

There's a lot more work involved than simply exporting the PLY file to another format. I've explained this before, but I think it's time for a tutorial, so in the next couple of hours, I'll do a new post with the tutorial.

Re: Noise removal, and cleanup

null@example.com (Vinoh) — Wed, 09 Sep 2015 03:19:29 +0000

Great info, pirvan. Sorry to be dense, but there is something basic I'm not understanding. I seem to have to bring the FreeLSS .ply into Meshlab with "Import Mesh". So isn't the file already a mesh at that point? Simply exporting from Meshlab it as an .obj file to MeshMixer did not seem to have any effect on the holes.

Maybe you execute some set of functions in Meshlab to do what you mention. If so, which functions do you run to make it watertight?

Thanks for the help!

--Dave

Re: Noise removal, and cleanup

null@example.com (pirvan) — Wed, 09 Sep 2015 02:52:31 +0000

getting models without holes really starts with Meshlab, when you generate the mesh from the point cloud. Eevry mesh I generated was manifold (watertight).

In Meshmixer there have been occasions where I "over-sculpted" some area, which ended up pushing one surface through another, but I don't think I ever had to fill any holes. Nevertheless, you can use the Analysis/Inspector feature to check the model for problems, and it will auto fix them. Or you can also use Edit/Close Cracks to do the same

You can also open the STL in NetFabb and fix it there.

Most of the clean up I do in Meshmixer is done using the sculpt tools. I use most of the tools, but I generally use Inflate, Draw and Flatten to fill in areas that are missing, then I use the Pinch tool to create or enhance the details. I also use the Shrink Smooth to smooth wrinkled areas. Of course, I constantly adjust the size and strength of the tools as needed.

Re: Noise removal, and cleanup

null@example.com (Vinoh) — Tue, 08 Sep 2015 23:04:30 +0000

I tried that and still got crashes. However, I find if my scans are relatively clean, it works much better and seldom crashes. I'm actually starting to like the program a lot and getting some pretty good results with it, although not as good as yours yet. And, as you had mentioned, focusing my camera helped as well.

Filling in holes and cracks left over from the automatic repair is my current challenge. Which tool do you use? I'm having some success with the Drag brush in the Sculpt tool.

Thanks for showing us with your great scans that this is indeed possible!

--Dave

Re: Noise removal, and cleanup

null@example.com (pirvan) — Tue, 08 Sep 2015 22:47:01 +0000

Not me, sorry. I use it native on a PC. Emulators or VM's like Parallels don't always work like the real deal.

On the other hand, why not setup your MacBook Pro with Boot Camp so you can run Windows on it natively?

Re: Noise removal, and cleanup

null@example.com (Vinoh) — Sun, 06 Sep 2015 07:16:04 +0000

I think Meshmixer is the most approachable of the various free programs I've tried and so I've start looking at the tutorials, etc. However, I find that it crashes my Macbook Pro and Parallels/Windows 7 so often that it's completely unusable. Has anyone had success editing scans with Meshmixer on a Mac or Parallels? Thanks.

--Dave