# Splataverse-Replica: Replica Dataset with real per-Gaussian semantic labels

Every scene in [facebookresearch/Replica-Dataset](https://github.com/facebookresearch/Replica-Dataset)
v1.0 (18 real scanned indoor spaces), converted through splataverse's own analytic,
training-free mesh->3D-Gaussian-splat converter, with a REAL per-Gaussian `seg_id`
carried the entire way from Replica's own `habitat/info_semantic.json` per-instance
`class_id` annotation -- not a hand-assigned or predicted label.

## License

Non-commercial research/educational use only, per the Replica Dataset's own "Replica Dataset Research Terms" (facebookresearch/Replica-Dataset LICENSE): employees of for-profit/commercial entities may use it only for research/educational purposes, not commercial products; provided AS IS with no warranty; California law governs. This derivative (splat conversion + real semantic labels) carries the same terms as the source data.

## Structure

Per scene (`<scene_name>/`):
- `scene.ply` -- one merged composite splat for the whole scene. Standard splat PLY
  fields (`x,y,z,scale_0..2,rot_0..3,opacity,f_dc_0..2`) plus a custom int32 `seg_id`
  property: Replica's own real semantic `class_id` for the object each Gaussian came
  from (`-1` for objects absent from Replica's own annotation, or explicitly labeled
  "undefined" there -- a real gap in the source dataset's own export, not this
  pipeline's).
- `manifest.json` -- per-object category name, class_id, Replica's own instance id,
  and Gaussian count.

`classes.json` (repo root) -- the real 101-class id->name map, identical across every
scene (Replica uses one shared taxonomy for the whole dataset).

## Provenance

Converted via `splataverse.convert_mesh` (unmodified converter, same code path every
other object in this project's datasets uses) on `habitat/mesh_semantic.ply` +
`info_semantic.json`, grouping faces by Replica's own per-face `object_id`,
fan-triangulating each object's quads (this mesh format), converting per-object, then
stamping every resulting Gaussian's `seg_id` with that object's real `class_id`.