4 ms·

Another great free alternative is COLMAP (https://demuc.de/colmap https://demuc.de/colmap). And for those interested in doing this on mobile in real-time, we'v

by nobbis 7y ago

Another great free alternative is COLMAP (https://demuc.de/colmap https://demuc.de/colmap). And for those interested in doing this on mobile in real-time, we've just released a beta SDK (https://abound.dev https://abound.dev) that lets you add real-time photogrammetry to any iOS app.

Fission 7y ago
Very cool stuff! Since you're using volumetric integration/fixed voxel size, one trick to get significantly improved visual texturing quality is to low-pass/smooth the mesh right before texturing.
- nobbis 7y ago
  Yes, we support Laplacian filtering of the level set prior to meshing in the SDK (plus other mesh smoothing techniques.) There are trade-offs involved.
obviuosly 7y ago
How do COLMAP, Meshroom and VisualSFM compare to one another?
- atkbrah 7y ago
  Some stuff that comes into mind: * COLMAP and Meshroom are able to create a mesh from the pointcloud whereas VisualSFM is not. If you wish to create a mesh out of VisualSFM end result, you could use OpenMVS[1] * COLMAP does not create a texture file for the resulting mesh - instead it uses vertex color for "texturing" * COLMAP and Meshroom licenses permit commercial usage - VisualSFM does not (you need to license it) From these three I've found that COLMAP works the best and VisualSFM comes second. Meshroom has a nice feature that allows you to add images into your model incrementally (I think without complete recompute) but it didn't work that well yet. What comes to open source photogrammetry in general, my opinion is that COLMAP + OpenMVS or OpenMVG[2] + OpenMVS are the tools to go albeit the command line interface with huge amount of possible options can be a bit tricky at first. 1. https://github.com/cdcseacave/openMVS https://github.com/cdcseacave/openMVS 2. https://github.com/openMVG/openMVG https://github.com/openMVG/openMVG
  - obviuosly 7y ago
    Thanks for this overview. > Meshroom has a nice feature that allows you to add images into your model incrementally VisualSFM also does not recompute when adding photos later, IIRC what I read in the manual.
gloflo 7y ago
And MicMac https://micmac.ensg.eu/index.php/Accueil https://micmac.ensg.eu/index.php/Accueil And OpenSFM https://github.com/mapillary/OpenSfM https://github.com/mapillary/OpenSfM I wish they better documented their specific benefits and short comings.
- nobbis 7y ago
  I find COLMAP has better dense depth maps, a more configurable pipeline, is cross-platform, the code is solid, and the accompanying research is principled (it takes a Bayesian approach to stereo matching.) What aspects of these make them great alternatives in your opinion?
  - gloflo 7y ago
    I wish I knew! They are all on my list to try, that's all for now. :)
    - nobbis 7y ago
      Got it. If you’re just listing open source photogrammetry software, there are many more you can add, e.g. Regard3D, OpenMVG.
gloflo 7y ago
Considering this is a thread about open source software I feel like your self promotion of a proprietary service is out of place.
- atdrummond 7y ago
  They also offered a link to a free library prior to doing so. I think the comment walks a fair line between substantive (in an area of which they clearly have domain knowledge) and advertisement.
- ereyes01 7y ago
  Open source does not mean anti-commercial to most people.
  - gloflo 7y ago
    I never said that.
- Sophistifunk 7y ago
  It's a thread about photogrammetry.
  - gloflo 7y ago
    > Meshroom: Open-Source Photogrammetry Software
feniv 7y ago
Is it possible to use the Apple Face ID sensor to perform a kinect-like 3D mapping of an environment or is the range of those sensors too limited for that?
- nobbis 7y ago
  Range is too limited, it's front-facing (can't see what you're scanning), and the OS-provided SLAM system isn't available (so tracking error accumulates.) Issues that will disappear in the long-run, of course. One startup taking that approach is https://standardcyborg.com https://standardcyborg.com. Apologies if linking to a business is unseemly - they are YC-backed at least.
  - jeffchuber 7y ago
    Jeff from SC here. Thanks @nobbis!
Aeolun 7y ago
This looks really cool. Is there a demo application published somewhere that I could use to test?

by nobbis 7y ago

Fission 7y ago

Very cool stuff! Since you're using volumetric integration/fixed voxel size, one trick to get significantly improved visual texturing quality is to low-pass/smooth the mesh right before texturing.

nobbis 7y ago
Yes, we support Laplacian filtering of the level set prior to meshing in the SDK (plus other mesh smoothing techniques.) There are trade-offs involved.

obviuosly 7y ago

How do COLMAP, Meshroom and VisualSFM compare to one another?

atkbrah 7y ago
Some stuff that comes into mind: * COLMAP and Meshroom are able to create a mesh from the pointcloud whereas VisualSFM is not. If you wish to create a mesh out of VisualSFM end result, you could use OpenMVS[1] * COLMAP does not create a texture file for the resulting mesh - instead it uses vertex color for "texturing" * COLMAP and Meshroom licenses permit commercial usage - VisualSFM does not (you need to license it) From these three I've found that COLMAP works the best and VisualSFM comes second. Meshroom has a nice feature that allows you to add images into your model incrementally (I think without complete recompute) but it didn't work that well yet. What comes to open source photogrammetry in general, my opinion is that COLMAP + OpenMVS or OpenMVG[2] + OpenMVS are the tools to go albeit the command line interface with huge amount of possible options can be a bit tricky at first. 1. https://github.com/cdcseacave/openMVS https://github.com/cdcseacave/openMVS 2. https://github.com/openMVG/openMVG https://github.com/openMVG/openMVG
- obviuosly 7y ago
  Thanks for this overview. > Meshroom has a nice feature that allows you to add images into your model incrementally VisualSFM also does not recompute when adding photos later, IIRC what I read in the manual.

gloflo 7y ago

And MicMac https://micmac.ensg.eu/index.php/Accueil https://micmac.ensg.eu/index.php/Accueil And OpenSFM https://github.com/mapillary/OpenSfM https://github.com/mapillary/OpenSfM I wish they better documented their specific benefits and short comings.

nobbis 7y ago
I find COLMAP has better dense depth maps, a more configurable pipeline, is cross-platform, the code is solid, and the accompanying research is principled (it takes a Bayesian approach to stereo matching.) What aspects of these make them great alternatives in your opinion?
- gloflo 7y ago
  I wish I knew! They are all on my list to try, that's all for now. :)
  - nobbis 7y ago
    Got it. If you’re just listing open source photogrammetry software, there are many more you can add, e.g. Regard3D, OpenMVG.

gloflo 7y ago

Considering this is a thread about open source software I feel like your self promotion of a proprietary service is out of place.

atdrummond 7y ago
They also offered a link to a free library prior to doing so. I think the comment walks a fair line between substantive (in an area of which they clearly have domain knowledge) and advertisement.
ereyes01 7y ago
Open source does not mean anti-commercial to most people.
- gloflo 7y ago
  I never said that.
Sophistifunk 7y ago
It's a thread about photogrammetry.
- gloflo 7y ago
  > Meshroom: Open-Source Photogrammetry Software

feniv 7y ago

Is it possible to use the Apple Face ID sensor to perform a kinect-like 3D mapping of an environment or is the range of those sensors too limited for that?

nobbis 7y ago
Range is too limited, it's front-facing (can't see what you're scanning), and the OS-provided SLAM system isn't available (so tracking error accumulates.) Issues that will disappear in the long-run, of course. One startup taking that approach is https://standardcyborg.com https://standardcyborg.com. Apologies if linking to a business is unseemly - they are YC-backed at least.
- jeffchuber 7y ago
  Jeff from SC here. Thanks @nobbis!

Aeolun 7y ago

This looks really cool. Is there a demo application published somewhere that I could use to test?