Feature request: colourized ply / nonsplat export

Suggestions & Feedback
1

-I need to export a colourised ply (not splat)
… to import a ariel lidar into reality capture (that errors saying that rgb is missing)

So the request here is to have an option for RGB/colourised ply pointcloud export.

My intent here is to use it to align photography with a colourised pointcloud by importing it into realityCapture as a ariel lidar with manual control points, so i can obtain camera positions to retrain splats with more these detailed images (resolution and colourspace). My assumption here is that RealityCapture error is correct (stating that RGB is missing) - and it’s not another issue. (I have not tested importing into agisoft metashape, colmap imports the non-colourised point cloud ok) - the original splat is from xgrids new portalcam

I have not tested these work arounds yet:

https://github.com/Lewis-Stuart-11/3DGS-to-PC
https://github.com/francescofugazzi/3dgsconverter
https://github.com/sepigraph/splat-to-rgb
nerfStudio: ns-export gaussian-splat

Thanks

2

@slimbuck

3

For now I have a workflow with a .py script

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4

Hi @Rafal_Kaniewski , yep as I guess you’ve found, GS ply files don’t use red, green, blue channels, but instead place the spherical harmonics mean (the sh equivalent of color) in f_dc_0/1/2.

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