README.md

---
license: cc-by-nc-nd-4.0
extra_gated_heading: "ConSynth-X — Access Request"
extra_gated_description: >
  ConSynth-X contains synthetic augmentations derived from Construction-Site
  (CC BY 4.0) and SODA (research-only) datasets. Access is granted on a
  per-request basis after review by the OpenConstruction team. Approval is
  typically within 5 business days.
extra_gated_prompt: >
  By requesting access you agree to: (1) use the data for non-commercial
  research only; (2) cite the ConSynth-X paper in any derived work;
  (3) for any SODA-derived rows (soda_voc, soda_ktsh subsets), separately
  obtain permission from the original SODA dataset team before redistribution
  or publication of derived artifacts.
extra_gated_fields:
  Full name: text
  Affiliation (university / organization): text
  Position / Role: text
  Country: country
  Intended use (brief description): text
  Will you redistribute the data?:
    type: select
    options:
      - No
      - No (NoDerivatives clause prohibits derivatives)
      - I will only redistribute the original unmodified dataset
  I agree to the CC BY-NC-SA license and SODA permission terms: checkbox
extra_gated_button_content: "Request access"
language:
- en
task_categories:
- object-detection
- image-to-image
- visual-question-answering
tags:
- construction
- synthetic-data
- weather-augmentation
- domain-shift
- robustness
- vlm-benchmark
size_categories:
- 10K<n<100K
pretty_name: ConSynth-X v2-strict (DINO ≥ 0.85)
configs:
- config_name: cs10k
  data_files:
  - split: original
    path: cs10k/parquet/original/*.parquet
  - split: fog_light
    path: cs10k/parquet/fog_light/*.parquet
  - split: fog_medium
    path: cs10k/parquet/fog_medium/*.parquet
  - split: fog_heavy
    path: cs10k/parquet/fog_heavy/*.parquet
  - split: rain_light
    path: cs10k/parquet/rain_light/*.parquet
  - split: rain_heavy
    path: cs10k/parquet/rain_heavy/*.parquet
  - split: snow_light
    path: cs10k/parquet/snow_light/*.parquet
  - split: snow_heavy
    path: cs10k/parquet/snow_heavy/*.parquet
  - split: night
    path: cs10k/parquet/night/*.parquet
  - split: rain_night
    path: cs10k/parquet/rain_night/*.parquet
  - split: snow_night
    path: cs10k/parquet/snow_night/*.parquet
  - split: small
    path: cs10k/parquet/small/*.parquet
- config_name: soda_voc
  data_files:
  - split: original
    path: soda_voc/parquet/original/*.parquet
  - split: fog_light
    path: soda_voc/parquet/fog_light/*.parquet
  - split: fog_medium
    path: soda_voc/parquet/fog_medium/*.parquet
  - split: fog_heavy
    path: soda_voc/parquet/fog_heavy/*.parquet
  - split: rain_light
    path: soda_voc/parquet/rain_light/*.parquet
  - split: rain_heavy
    path: soda_voc/parquet/rain_heavy/*.parquet
  - split: snow_light
    path: soda_voc/parquet/snow_light/*.parquet
  - split: snow_heavy
    path: soda_voc/parquet/snow_heavy/*.parquet
  - split: night
    path: soda_voc/parquet/night/*.parquet
  - split: rain_night
    path: soda_voc/parquet/rain_night/*.parquet
  - split: snow_night
    path: soda_voc/parquet/snow_night/*.parquet
  - split: small
    path: soda_voc/parquet/small/*.parquet
- config_name: soda_ktsh
  data_files:
  - split: original
    path: soda_ktsh/parquet/original/*.parquet
  - split: fog_light
    path: soda_ktsh/parquet/fog_light/*.parquet
  - split: fog_medium
    path: soda_ktsh/parquet/fog_medium/*.parquet
  - split: fog_heavy
    path: soda_ktsh/parquet/fog_heavy/*.parquet
  - split: rain_light
    path: soda_ktsh/parquet/rain_light/*.parquet
  - split: rain_heavy
    path: soda_ktsh/parquet/rain_heavy/*.parquet
  - split: snow_light
    path: soda_ktsh/parquet/snow_light/*.parquet
  - split: snow_heavy
    path: soda_ktsh/parquet/snow_heavy/*.parquet
  - split: night
    path: soda_ktsh/parquet/night/*.parquet
  - split: rain_night
    path: soda_ktsh/parquet/rain_night/*.parquet
  - split: snow_night
    path: soda_ktsh/parquet/snow_night/*.parquet
  - split: small
    path: soda_ktsh/parquet/small/*.parquet
---

# ConSynth-X (v2-strict on `main`)

**ConSynth-X** is a construction computer-vision robustness benchmark: paired synthetic augmentations of real construction site images under weather, lighting, scale, and domain-shift conditions, for evaluating object detectors and vision-language models (VLMs).

The **`main` branch now hosts the v2-strict release** (DINO ≥ 0.85, 37,308 paired rows). The previous **v1 release (122,156 rows) is preserved on branch [`v1`](https://huggingface.co/datasets/openconstruction/ConSynth-X/tree/v1)** for reproducibility.

![Preview grid (5 source images × 12 conditions)](grid_5samples_12cond.jpg)
*5 source images shown across the 12 conditions — bounding boxes drawn for the cs10k subset.*

## v2-strict summary

| Subset    | Source images | Rows (× 12 conditions) |
|-----------|--------------:|-----------------------:|
| cs10k     |         1,586 |                 19,032 |
| soda_voc  |           608 |                  7,296 |
| soda_ktsh |           915 |                 10,980 |
| **Total** |     **3,109** |             **37,308** |

Every source image is fully paired across all 12 conditions (1 original + 11 synthetic), enabling rigorous cross-condition (paired) robustness analysis.

**Gating rule.** A source image is retained iff **all 9 GATE conditions** (fog_{light,medium,heavy}, rain_light, snow_{light,heavy}, night, small) achieve **DINO cosine similarity ≥ 0.85** against the source. Three conditions are *autopassed* (rain_heavy, rain_night, snow_night) because their physics-overlay pipelines were already quality-controlled upstream.

**DINO model.** [`facebook/dinov3-vitl16-pretrain-lvd1689m`](https://huggingface.co/facebook/dinov3-vitl16-pretrain-lvd1689m) — CLS token, L2-normalized cosine.

## Conditions (12)

| Group  | Conditions                                                                    |
|--------|--------------------------------------------------------------------------------|
| baseline | `original`                                                                  |
| fog    | `fog_light`, `fog_medium`, `fog_heavy` — Depth Anything V2 + Koschmieder physics |
| rain   | `rain_light`, `rain_heavy` — IP2P + physics overlay                          |
| snow   | `snow_light`, `snow_heavy` — IP2P + physics overlay                          |
| night  | `night` — CycleGAN-Turbo day→night                                            |
| night × weather | `rain_night`, `snow_night` — Order B: orig → IP2P → day2night → physics |
| scale  | `small` — FLUX.1-Fill-dev outpainting                                         |

## Source datasets

| Subset    | Source                          | License       | Notes                                                                       |
|-----------|---------------------------------|---------------|------------------------------------------------------------------------------|
| cs10k     | Construction-Site (LouisChen15) | CC BY 4.0     | Bounding boxes (`objects` field, VOC schema)                                |
| soda_voc  | SODA-A (VOC view)               | research-only | Bounding boxes; **derived users must obtain permission from the SODA team** |
| soda_ktsh | SODA (caption/KTSH view)        | research-only | Captions; **derived users must obtain permission from the SODA team**       |

## Schema (per parquet row)

- `image` — image bytes (JPEG)
- `image_id`, `source_id`, `source_dataset`
- `condition`, `condition_labels` (multi-label)
- `objects` (cs10k / soda_voc — VOC bbox list) **or** `captions` (soda_ktsh)
- `rule_*_violation` (cs10k — safety rule flags)
- `pipeline` (generator metadata), `quality_scores` (DINO, etc.)

Pair across conditions by `source_id`.

## Loading

```python
from datasets import load_dataset

# v2-strict (default = main)
ds = load_dataset("openconstruction/ConSynth-X", "cs10k", split="fog_heavy")

# All conditions for a subset
ds = load_dataset("openconstruction/ConSynth-X", "soda_voc")

# v1 release (122,156 rows, full 11-condition v1)
ds_v1 = load_dataset("openconstruction/ConSynth-X", revision="v1")
```

## Versions

| Branch | Release | Rows | Notes |
|---|---|---:|---|
| `main` | v2-strict (DINO ≥ 0.85) | 37,308 | Paired, gated for high fidelity (current default) |
| `v1`   | v1 (2026-04-30)         | 122,156 | Original 11-condition release; superseded |

Related (relaxed-gate) releases of v2 family:
- **[Ben11304/ConSynth-X-v2-strict](https://huggingface.co/datasets/Ben11304/ConSynth-X-v2-strict)** — mirror of `main` (kept for citation links).
- v2 (DINO ≥ 0.75, 99,828 rows) and v2-unfiltered (216,000 rows) — internal; reach out for access.

## License

- **Dataset**: CC BY-NC-ND 4.0
- **Source datasets**: see original licenses above. SODA-derived rows require permission from the SODA team before redistribution.

## Citation

```bibtex
@dataset{consynth_x_v2_strict_2026,
  title  = {ConSynth-X v2-strict: DINO-gated paired synthetic augmentation for construction vision robustness},
  author = {Duong, Viet Huy and Xiong, Ruoxin},
  year   = {2026},
  url    = {https://huggingface.co/datasets/openconstruction/ConSynth-X}
}
```

## Acknowledgements

OpenConstruction Open Science Initiative · Construction Management Lab, College of Architecture and Environmental Design, Kent State University. Built atop Construction-Site, SODA, Depth Anything V2, InstructPix2Pix, CycleGAN-Turbo, and FLUX.1-Fill-dev.