README.md

---
license: cc-by-4.0
pretty_name: Google Scanned Objects (WebDataset)
tags:
- 3d
- mesh
- glb
- webdataset
- google-scanned-objects
- trellis
task_categories:
- image-to-3d
- text-to-3d
size_categories:
- 1K<n<10K
configs:
- config_name: default
  data_files:
  - split: train
    path: data/*.tar
---

# Google Scanned Objects (WebDataset)

A `load_dataset`-ready [WebDataset](https://github.com/webdataset/webdataset)
packaging of the **Google Scanned Objects** dataset: high-quality 3D scans of common
household items. Each object provides the original mesh/material/texture, five
render thumbnails, structured metadata, and a **normalized GLB** produced with
[`trimesh`](https://github.com/mikedh/trimesh) for direct use in 3D pipelines
(e.g. TRELLIS-2 fine-tuning).

- Objects: **1030**
- Shards: **43** (`data/gso-train-*.tar`)
- License: **Creative Commons Attribution 4.0 International** (cc-by-4.0)

## Usage

```python
from datasets import load_dataset

ds = load_dataset("suvadityamuk/google-scanned-objects", split="train")
sample = ds[0]
print(sample["json"]["name"], sample["json"]["category"])
sample["texture.png"]        # PIL.Image (diffuse texture)
sample["thumbnail_0.jpg"]    # PIL.Image (render)
glb_bytes = sample["glb"]    # bytes of a self-contained, normalized .glb
```

Streaming works too (no full download):

```python
ds = load_dataset("suvadityamuk/google-scanned-objects", split="train", streaming=True)
sample = next(iter(ds))
```

> GLB is a recognized mesh extension in the `datasets` WebDataset builder, so
> `glb` is loaded as a `Mesh` feature and rendered in the dataset viewer.
> A recent `datasets` version is required for the `Mesh` feature.

## Per-sample fields

| field | type | description |
|-------|------|-------------|
| `obj` | bytes | original `model.obj` mesh |
| `mtl` | bytes | original `model.mtl` material |
| `texture.png` | Image | diffuse texture |
| `glb` | Mesh | normalized, self-contained GLB (see below) |
| `thumbnail_0.jpg` .. `thumbnail_4.jpg` | Image | 5 render thumbnails |
| `json` | dict | metadata + `glb_processing` stats |

The `json` field contains: `object_id`, `name`, `description`, `version`,
`category`, `annotations` (e.g. `brand`, `gtin`, `sku`), `author`, `license`,
`license_id`, `license_url`, `copyright`, `source`, `num_thumbnails_original`,
and `glb_processing`.

## GLB normalization (trimesh)

Produced deterministically per object with `trimesh==4.12.2`:

1. Copy `materials/textures/texture.png` next to the OBJ so the MTL's
   `map_Kd texture.png` resolves and the diffuse map binds.
2. `trimesh.load(obj, process=False, force="mesh")` — preserves UVs, flattens
   to a single mesh.
3. Translate the axis-aligned bounding-box center to the origin.
4. Uniformly scale so the longest AABB edge is `1.0` (fits a unit cube).
5. Preserve UVs (no vertex merge); recompute normals only if missing.
6. Export a self-contained `.glb` with the texture embedded.

Every object's exact transform (`applied_translation`, `applied_scale`),
mesh stats (`vertices`, `faces`, `is_watertight`, `surface_area_normalized`,
`orig_extents`, `final_extents`, `texture_size`, `glb_size_bytes`) and any
`warnings` are recorded in `json["glb_processing"]` and aggregated in
[`stats/processing_log.jsonl`](./stats/processing_log.jsonl).

## Excluded objects

This dataset contains only the **1,030 objects authored by Google** (Fuel owner
`GoogleResearch`) in the "Scanned Objects by Google Research" collection. That
Fuel collection's listing also includes 16 models owned by other authors; they
are **intentionally excluded** because they are not Google scans, use a
different file structure (`.dae`/`.obj`, optional textures, 2-6 thumbnails), and
carry different licenses (CC-BY-4.0 and CC0-1.0):

- `OpenRobotics` (13): Bed, Cardboard box, Door handle, Fridge, Hinged door,
  KitchenCountertop, LampAndStand, Plastic Cup, Shower, SquareShelf,
  Standard Toilet, Vanity, WhiteCabinet
- `LeDSantos` (3): ada_lovelace_poster, garage_door, toilet_paper

These appear as `status: "failed"` rows in
[`stats/processing_log.jsonl`](./stats/processing_log.jsonl) (the raw downloader
requested them under the wrong owner, yielding invalid archives).

## License & attribution

This dataset is a repackaging of the Google Scanned Objects dataset by Google LLC,
licensed under [Creative Commons Attribution 4.0 International](https://creativecommons.org/licenses/by/4.0/) (`cc-by-4.0`).

> "Google Scanned Objects", Copyright 2020 Google LLC, licensed under CC BY 4.0.

You must give appropriate credit when using this data. See the `LICENSE` file
and each object's `json["copyright"]` / `json["license"]` fields.