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adec314 4 days ago [-]
I have been trying for a while to put irregular things (point clouds) in regular grids, to use the grid itself as a data structure. Not because it is better, but just because grids are more structured than e.g. trees and thus easier integrate into ML pipelines. It all started here, with simple multi-indexing:
Then I realised that to make the multi-indexing procedure more effective, I need some kind of preprocessing, to make the points flat (2d insteed of 3d). When they are already flat I can sort them better.
Then I heard about mesh flattening, https://geometrycollective.github.io/boundary-first-flatteni...
geometry images https://hhoppe.com/proj/gim/ and thought: this is something I need to try with point clouds, whenever they have a latent surfacic distribution. And well, it seems to work. At least now I can have bunnys dragon and elephants all to fit in the grid and not getting half of the legs, ears or whatever lost in the process.
4 days ago [-]
koolala 1 days ago [-]
Could this let you conpress models into lossy systems like JpegXL?
aaroninsf 2 days ago [-]
Could someone explain to me what this is for and when it comes up?
Opposite of snark: active curiosity :)
kridsdale1 2 days ago [-]
Possibly UV mapping to draw a texture map?
aaroninsf 1 days ago [-]
Ah so as to "paint" an asset that's been scanned perhaps?
vivzkestrel 1 days ago [-]
- doubt about perspective projection in your example
- where is x, y and z pointed towards and what is its range
https://news.ycombinator.com/item?id=49042861
Then I realised that to make the multi-indexing procedure more effective, I need some kind of preprocessing, to make the points flat (2d insteed of 3d). When they are already flat I can sort them better.
Then I heard about mesh flattening, https://geometrycollective.github.io/boundary-first-flatteni... geometry images https://hhoppe.com/proj/gim/ and thought: this is something I need to try with point clouds, whenever they have a latent surfacic distribution. And well, it seems to work. At least now I can have bunnys dragon and elephants all to fit in the grid and not getting half of the legs, ears or whatever lost in the process.
Opposite of snark: active curiosity :)
- where is x, y and z pointed towards and what is its range