README.md

---
configs:
- config_name: phase_variation
  data_files: phase_variation-*.parquet
  default: true
- config_name: size_variation
  data_files: size_variation-*.parquet
- config_name: contrastive_probing
  data_files: contrastive_probing.parquet
dataset_info:
  features:
  - name: index
    dtype: int64
  - name: image
    dtype: image
  - name: question
    dtype: string
  - name: answer
    dtype: string
---

# SpatialTunnel

SpatialTunnel is a Blender-rendered diagnostic dataset for studying how vision-language models represent spatial relations internally. It was introduced in **Why Far Looks Up: Probing Spatial Representation in Vision-Language Models** ([arXiv:2605.30161](https://arxiv.org/abs/2605.30161)).

## Resources

- [Project page](https://cheolhong0916.github.io/whyfarlooksup.github.io/)
- [Contrastive-probing code](https://github.com/cheolhong0916/contrastive-probing)
- [SpatialTunnel generation code](https://github.com/cube-c/spatialtunnel-dataset-gen)

## Dataset Configurations

| Config | File | Rows | Description |
|---|---|---|---|
| `phase_variation` | `phase_variation-*.parquet` | 12,288 | Binary depth-comparison questions with controlled angular-position variation. |
| `size_variation` | `size_variation-*.parquet` | 4,400 | Binary depth-comparison questions under controlled object-size variation. |
| `contrastive_probing` | `contrastive_probing.parquet` | 1,200 | Balanced spatial-relation questions for contrastive probing. |

## Format

All configurations use Parquet files with the following columns:

For `phase_variation` and `size_variation`, each rendered image is paired with four binary VQA questions that vary the object order and comparison direction (`closer`/`farther`).

| Column | Description |
|---|---|
| `index` | Row index within the selected config. |
| `image` | PNG image stored as a Hugging Face `Image` feature. |
| `question` | Spatial question to ask the model. |
| `answer` | Ground-truth answer for the row. |

`contrastive_probing.tsv` is a TSV file for compatibility with the [contrastive-probing code](https://github.com/cheolhong0916/contrastive-probing).

---

## Citation

If you use this dataset, please cite our paper.

```bibtex
@article{min2026whyfarlooksup,
  title   = {Why Far Looks Up: Probing Spatial Representation in Vision-Language Models},
  author  = {Min, Cheolhong and Jung, Jaeyun and Lee, Daeun and Jeon, Hyeonseong and
             Su, Yu and Tremblay, Jonathan and Song, Chan Hee and Park, Jaesik},
  journal = {arXiv preprint arXiv:2605.30161},
  year    = {2026},
}
```