Gaussian splats from video footage

Here's a few steps on getting an easy GS from Postshot

Get postshot from here:

 https://www.jawset.com/

Prepare your plate, should be a continous shot, with litle DOF and motion Blur , and if there's moving objects, those will need to maskout as black or as a transparency.

When importing the image sequence , make sure you don't use the full sequence

in my tests you get a better result in way less images. And don't let the software downres it .

After training and letting it do all the calculations, you get a few interesting things.

Cameras, a point cloud and the info for GS.

pct

cameras

We can render a image sequence from it, but the powerfull thing will be on the exported data.

Taking this to houdini its possible to get a lot out of it

Convert PLY to colour

Vex expression

// https://github.com/graphdeco-inria/gaussian-splatting/blob/472689c0dc70417448fb451bf529ae532d32c095/utils/sh_utils.py#L57

float SH_C0 = 0.28209479177387814;

@Cd = pow(set(0.5 + SH_C0 * @f_dc_0,

0.5 + SH_C0 * @f_dc_1,

0.5 + SH_C0 * @f_dc_2),

1);