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Maybe the lack of commenter enthusiasm is because point clouds are fairly specialized. Most people don’t have interesting point cloud data lying around to test

by pavlov 4y ago

Maybe the lack of commenter enthusiasm is because point clouds are fairly specialized. Most people don’t have interesting point cloud data lying around to test this with, or the means to capture such data. 3D sensors are slowly but surely becoming more common. The iPhone Pro series has one, and AR hardware designs tend to include these capabilities. So this model synthesis seems a bit ahead of the curve, in a good way.

JayStavis 4y ago
Agree with you that point clouds aren't mainstream at all and most people aren't sure what they'd use them for. I think the premise of this is text-to-3D, and that because it's quicker generations you don't really need anything besides a GPU to start playing around with it.
uplifter 4y ago
anyone with a recent (last five years) iphone or ipad has the means to generate point cloud data using the depth sensors.
- speedgoose 4y ago
  Do you have an app to recommend? And does it work well on small objects? The apps I tried were not very impressive.
  - uplifter 4y ago
    Sorry I don’t know any store apps for such, my only experience is through personal corespondance/demos with/by developers experimenting with the hardware feature and sdk. Quick googling turns up some contenders but I can’t vouch for them: https://apps.apple.com/ca/app/point-cloud-ar/id1435700044 https://apps.apple.com/ca/app/point-cloud-ar/id1435700044 https://apps.apple.com/ca/app/point-precise/id1629822901 https://apps.apple.com/ca/app/point-precise/id1629822901
    - astrange 4y ago
      Polycam https://apps.apple.com/us/app/polycam-lidar-3d-scanner/id1532482376 https://apps.apple.com/us/app/polycam-lidar-3d-scanner/id153... is good for outdoor scanning in my limited experience.
  - janekm 4y ago
    It generates nerfs (which have some advantages as well as disadvantages depending on application) but Luma AI is arguably SotA for photogrammetry on iPhones.
- alvah 4y ago
  Theoretically this is the case, but in my testing with several apps on an iPhone 13 Pro the results are underwhelming.
9wzYQbTYsAIc 4y ago
> Maybe the lack of commenter enthusiasm is because point clouds are fairly specialized. Please correct me if I am wrong. The pointcloudtomesh notebook seems to be be able to output something could be converted for 3d printing purposes. I haven’t yet attempted to do so, but that does seem like an exciting and general purpose use case.
redavni 4y ago
There is a lot of publicly available realtime satellite data that nicely converts to point cloud based on cloud top temperature.
bitL 4y ago
Can't you easily convert point clouds to polygons? If you know the sampling frequency, it's trivial to identify holes/edges/faces and just convert it to a rough polygonal model. Then you can run edge collapses with a desired error to make it smoother.

by pavlov 4y ago

JayStavis 4y ago

Agree with you that point clouds aren't mainstream at all and most people aren't sure what they'd use them for. I think the premise of this is text-to-3D, and that because it's quicker generations you don't really need anything besides a GPU to start playing around with it.

uplifter 4y ago

anyone with a recent (last five years) iphone or ipad has the means to generate point cloud data using the depth sensors.

speedgoose 4y ago
Do you have an app to recommend? And does it work well on small objects? The apps I tried were not very impressive.
- uplifter 4y ago
  Sorry I don’t know any store apps for such, my only experience is through personal corespondance/demos with/by developers experimenting with the hardware feature and sdk. Quick googling turns up some contenders but I can’t vouch for them: https://apps.apple.com/ca/app/point-cloud-ar/id1435700044 https://apps.apple.com/ca/app/point-cloud-ar/id1435700044 https://apps.apple.com/ca/app/point-precise/id1629822901 https://apps.apple.com/ca/app/point-precise/id1629822901
  - astrange 4y ago
    Polycam https://apps.apple.com/us/app/polycam-lidar-3d-scanner/id1532482376 https://apps.apple.com/us/app/polycam-lidar-3d-scanner/id153... is good for outdoor scanning in my limited experience.
- janekm 4y ago
  It generates nerfs (which have some advantages as well as disadvantages depending on application) but Luma AI is arguably SotA for photogrammetry on iPhones.
alvah 4y ago
Theoretically this is the case, but in my testing with several apps on an iPhone 13 Pro the results are underwhelming.

9wzYQbTYsAIc 4y ago

> Maybe the lack of commenter enthusiasm is because point clouds are fairly specialized. Please correct me if I am wrong. The pointcloudtomesh notebook seems to be be able to output something could be converted for 3d printing purposes. I haven’t yet attempted to do so, but that does seem like an exciting and general purpose use case.

redavni 4y ago

There is a lot of publicly available realtime satellite data that nicely converts to point cloud based on cloud top temperature.

bitL 4y ago

Can't you easily convert point clouds to polygons? If you know the sampling frequency, it's trivial to identify holes/edges/faces and just convert it to a rough polygonal model. Then you can run edge collapses with a desired error to make it smoother.