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Thread: Photogrammetry

  1. #1
    Super Member vncnt's Avatar
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    Photogrammetry

    Just wondering if there are more Lightwave users interested in photogrammetry. For modelling and texturing.
    Workflow ideas? Feature requests? Limitations? Best practices? Tips and tricks?

    As far as I understand I could use: VisualSFM - Meshlab - 3DCoat - Lightwave
    (respectively: point cloud generation - mesh/UV generation and noise reduction - retopology - import, rigging, animation and rendering)

    Any suggestion?

  2. #2
    RETROGRADER prometheus's Avatar
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    Typicly useful for secondary nature stuff, cliff, rocks, landscape, tree, roots, pebbles etc.
    also useful for historical and archealogical pieces, statues, historical buildings, fossile finds, skeletons of animals etc.

    sketchfab is a great resource for showcasing historic or other stuff mentioned above, mostly with a license for study and showcase..not commercial.

    plg mesh tools is great to reduce those heavy polys while maintaining the uv map intact.

  3. #3
    Like Prometheus said, it really depends on your needs, for modern buildings or anything with reflections it doesn't work. It can help you get the proportions correctly but that's about it. I tried a few free and commercial demos of different packages and I came out really impressed with Reality Capture, it needed fewer photos, worked faster and had the best results. It is relatively pricey, but if I had a paid gig that required it, I'd go for it as it saves a ton of time.

  4. #4
    Super Member vncnt's Avatar
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    Reflective surfaces causes problems with match-moving too (I'm a SynthEyes user). The "Sparse Reconstruction" looks very similar to the match-moving process. Have you tried to mask reflections in the image files and manually deleting wrong trackers? Or some specific light rig or applying dust/powder/markers to reflective surfaces?

    I'd like to use this method for human heads (+ generic body) and as a starting point for interiors.
    And I think I need to simplify their mesh for use in Unity projects.

    I've never used 3DCoat for retopology.
    Also I'm very curious how Lightwave 2018 handles a high density pointcloud/mesh.
    And interested to see what to do with pointclouds in Fusion.

    I'll run some tests when I return from holiday and I'll publish them in here.

  5. #5
    Manualy editing the photos is out of the question, a good point cloud requires several hundred photos for each room, besides retouching by hand would most likely just introduce even more errors. Clients wouldn't appreciate me coating everything in his building with sticky fine dust either. One technique I have seen detailed is to remodel everything, basing the modeling on the hi rez point cloud generated mesh. (for modern low detail structures and buildings for example) then bake the texture of the high poly mesh created by the point cloud into the hand modeled structure, this gives you the best geometric topology possible while keeping the textures and lighting of the captured cloud.

  6. #6
    Super Member XswampyX's Avatar
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    Has anybody tried Meshroom 2018..?

    It's un-f****** believable!

    Click image for larger version. 

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    Here : https://github.com/alicevision/meshr.../tag/v2018.1.0

  7. #7
    Not so newbie member lardbros's Avatar
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    Quote Originally Posted by XswampyX View Post
    Has anybody tried Meshroom 2018..?

    It's un-f****** believable!

    Click image for larger version. 

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    Here : https://github.com/alicevision/meshr.../tag/v2018.1.0
    Thanks for posting that Swampy! Glad to see you're still around too actually... thought you may have stopped using LW or something

    Will check this out... we currently use Agisoft Photoscan, but it's always nice to have alternatives!
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  8. #8
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    I record at 60fps on an iPad Pro, then export that to an image sequence in QuickTime Pro, then send that to RealityCapture.

    From there, I often do some cleanup in LightWave, but that's optional, of course.

    Hmm. Looks like I don't have any scans from that online. But I do have this, which is Xbox One video recorded flying around a structure in Halo Wars, which is kinda funny if you think about it... (model in video game to movie to photogrammetry to model)
    https://sketchfab.com/models/4de4ef5...a5d9c08831f4db

    -Chilton

  9. #9
    Super Member XswampyX's Avatar
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    Quote Originally Posted by lardbros View Post
    Thanks for posting that Swampy! Glad to see you're still around too actually... thought you may have stopped using LW or something

    Will check this out... we currently use Agisoft Photoscan, but it's always nice to have alternatives!
    Cheers!

    Did I mention that it's free?

    Click image for larger version. 

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  10. #10
    Man of many cells. shrox's Avatar
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    Quote Originally Posted by XswampyX View Post
    Has anybody tried Meshroom 2018..?

    It's un-f****** believable!

    Click image for larger version. 

Name:	MeshRoom_Mod.jpg 
Views:	128 
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ID:	143402

    Click image for larger version. 

Name:	MeshRoom_Prg.jpg 
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ID:	143403

    Here : https://github.com/alicevision/meshr.../tag/v2018.1.0
    Thank you sir!
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  11. #11
    Axes grinder- Dongle #99
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    Quote Originally Posted by XswampyX View Post
    Cheers!

    Did I mention that it's free?

    Click image for larger version. 

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    goddddamn those are good.

    Need to see if my gfx card has the goods.
    Last edited by jeric_synergy; 11-24-2018 at 04:32 PM.
    They only call it 'class warfare' when we fight back.
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  12. #12
    Super Member XswampyX's Avatar
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    Thanks again.

    How do you lot bake them to a lower poly model...?

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    Here's the low poly model for you.
    Attached Files Attached Files

  13. #13
    Axes grinder- Dongle #99
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    Question CUDA/ cc>=2.0 , wuzzat?

    This (FREE!!!! crazy!) program needs a video card, (QUOTE)

    Requirement: NVIDIA CUDA-enabled GPU (compute capability >= 2.0).

    What's a good price for such a card? This is the first time I've ever seen a reference to 'compute capability'.


    Many thanks to Swampy for pointing this out: it could be WIDELY useful in animation, mograph, and AR/VR.

    +++++++++

    A little bit of research, and even my elderly card has a CC of 5.2, so most people are probably fine. ::rubs hands together::
    Last edited by jeric_synergy; 11-26-2018 at 02:34 PM.
    They only call it 'class warfare' when we fight back.
    Praise to Buddha! #resist
    Chard's Credo-"Documentation is PART of the Interface"
    Film the cops. Always FILM THE COPS. Use this app.

  14. #14
    Super Member XswampyX's Avatar
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    Quote Originally Posted by jeric_synergy View Post
    This (FREE!!!! crazy!) program needs a video card, (QUOTE)

    Requirement: NVIDIA CUDA-enabled GPU (compute capability >= 2.0).

    What's a good price for such a card? This is the first time I've ever seen a reference to 'compute capability'.


    Many thanks to Swampy for pointing this out: it could be WIDELY useful in animation, mograph, and AR/VR.

    +++++++++

    A little bit of research, and even my elderly card has a CC of 5.2, so most people are probably fine. ::rubs hands together::
    Did you get it to work?

    It does have problems with reflections and I suggest you keep your item in the same position/location until you are happy with the results. If you do you can take some extra photo's to fill in the bad bits...

    Close but no cigar.

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