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Macro Gaussian Splats

https://danybittel.ch/macro.html
119•danybittel•3h ago

Comments

hmry•2h ago
Amazing work, I especially love that you put all of them online to view. The bumblebee is my favorite, so fuzzy
kreelman•2h ago
I agree. The fine detail on the insects skin/shell is amazing.

I'd love to know the compute hardware he used and the time it took to produce.

danybittel•2h ago
Nothing fancy. Postshot does need a nvidia card though, I have a 3060Ti. A single insect, with around 5 million splats takes about 3 hours to train in high quality.
smokel•2h ago
That's quite the improvement over Stars/NoooN [1] showing off real-time rendering of (supposedly) 23,806 triangles on a 486.

[1] https://youtu.be/wEiBxHOGYps

mkl•1h ago
The results are incredibly clean! Feathers and flowers could be interesting.

Black text on a dark grey background is nearly unreadable - I used Reader Mode.

1gn15•1h ago
This looks amazing, and never thought to combine macro photography and Gaussian splatting.

I'd also like to show my gratitude for you releasing this as a free culture file! (CC BY)

Scene_Cast2•1h ago
I wonder if there's research into fitting gaussian splats that are dependent on focus distance? Basically as a way of modeling bokeh - you'd feed the raw, unstacked shots and get a sharp-everywhere model back.
yorwba•55m ago
Multiple groups working on this:

https://dof-gs.github.io/

https://dof-gaussian.github.io/

danybittel•5m ago
Thanks for the links, that is great to know. I'm not quite sold if it's the better approach. You'd need to do SfM (tracking) on the out of focus images, which with macro subject can be really blurry, I don't know how well that works.. and a lot more of images too. You'd have group them somehow or preprocess.. then you're back to focus stacking first :-)
etskinner•1h ago
How does it capture the reflection (the iridescence of the fly's body)? It's almost as if I can see the background through the reflection.

I would have thought that since that reflection has a different color in different directions, gaussian splat generation would have a hard time coming to a solution that satisfies all of the rays. Or at the very least, that a reflective surface would turn out muddy rather than properly reflective-looking.

Is there some clever trickery that's happening here, or am I misunderstanding something about gaussian splats?

abainbridge•1h ago
FTA, "A Gaussian splat is essentially a bunch of blurry ellipsoids. Each one has a view-dependent color". Does that explain it?
Klaus23•1h ago
Gaussian splats can have colour components that depend on the viewing direction. As far as I know, they are implemented as spherical harmonics. The angular resolution is determined by the number of spherical harmonic components. If this is too low, all reflection changes will be slow and smooth, and any reflection will be blurred.
Feuilles_Mortes•1h ago
Wow this would be lovely for my Drosophila lab.
zokier•47m ago
It is remarkable that this is accomplished with relatively modest setup and effort, and the results are already great. Makes me wonder what you could get with high-end gear (e.g. 61mp sony a7rv and the new 100mm 1.4x macro) and capturing more frames. I also imagine that the web versions lose some detail to reduce size.

I presume these would look great on good vr headset?

cssinate•35m ago
Cool! It looks awesome. I did see some "ghost legs" on the bumblebee. How does that sort of artifact happen?
iamflimflam1•22m ago
Looks amazing. Some feedback on the website - black text on a dark grey background? I had to use reader mode.

Macro Gaussian Splats

https://danybittel.ch/macro.html
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