File size: 4,803 Bytes
1b528f0 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 | ---
license: cc-by-4.0
task_categories:
- image-to-image
tags:
- relighting
- HDR
- environment-map
- outdoor
- real-world
pretty_name: WildRelight
---
# WildRelight Dataset
A real-world relighting dataset of 30 outdoor/semi-indoor scenes captured across multiple time steps throughout the day. Each scene provides paired HDR photographs and HDR environment maps, enabling evaluation of outdoor relighting tasks.
## Key Statistics
| Property | Value |
|----------|-------|
| Scenes | 30 |
| Time steps per scene | 6–8 (spaced ~1 hour apart) |
| Total HDR photo/envmap pairs | 196 |
| Photo resolution (full) | 6048 × 4024 px |
| Envmap resolution (full) | 7680 × 3840 px (equirectangular) |
| Photo resolution (small) | 1200 × ~798 px |
| Envmap resolution (small) | 1200 × 600 px |
| File format | OpenEXR|
| HDR normalization | Radiance at reference shutter speed (1/500 – 1/10 s, per scene) |
## Equipment
- **Main camera**: Sony α7 series — RAW
- **360° camera**: Insta360 Pro2 — 6-lens equidistant fisheye, stitched to equirectangular
## Dataset Variants
Two resolution variants are provided under `ori/` and `small/`. Within each variant, every scene contains four folders:
```
{variant}/{scene}/
├── photo/ # HDR photograph (unaligned)
├── photo_aligned/ # HDR photograph (temporally aligned, recommended)
├── envmap/ # HDR environment map (unaligned)
└── envmap_aligned/ # HDR environment map (temporally aligned, recommended)
```
Both `photo_aligned/` and `envmap_aligned/` are temporally aligned to the first time step — each image is warped so that the static background is registered across time. Use these for relighting experiments.
## File Naming
```
photo/ time{N}_hdr.exr (N = 0, 1, 2, …)
envmap/ time{N}_envmap.exr
```
## Metadata
Each scene contains a `meta.json` with:
| Field | Description |
|-------|-------------|
| `scene` | Scene name |
| `ref_shutter` | Reference shutter speed (seconds) used for HDR normalization |
| `ref_shutter_fraction` | Human-readable, e.g. `"1/500"` |
| `hdr_method` | HDR merge algorithm (`triangular_weight_debevec1997`) |
| `alignment_method` | `life_optical_flow` or `cv2_sift_homography` |
| `gps` | `{latitude, longitude, altitude_m}` — available for 10 scenes |
| `photos[].shooting_time` | Capture timestamp from EXIF |
| `photos[].iso` | ISO speed |
| `photos[].shutter_speed` | Representative shutter speed (human-readable) |
| `envmaps[].shooting_time` | Capture timestamp |
| `envmaps[].shutter_speed` | Envmap shutter speed |
## Scene List
GPS coordinates are provided as additional information. Since collecting GPS coordinates was not part of the original plan, only 10 scenes contain GPS coordinates.
| Scene | Time steps | Alignment | GPS |
|-------|-----------|-----------|-----|
| bench2 | 6 | LIFE flow | — |
| bench3 | 6 | LIFE flow | — |
| bike | 6 | LIFE flow | yes |
| bikes2 | 6 | LIFE flow | — |
| bridge | 6 | LIFE flow | — |
| building304 | 6 | LIFE flow | — |
| building324 | 7 | LIFE flow | — |
| byway | 6 | LIFE flow | yes |
| cabin | 6 | CV2/SIFT | — |
| corridor | 6 | LIFE flow | yes |
| foodtruck | 6 | LIFE flow | yes |
| garden | 6 | LIFE flow | — |
| grassland | 7 | LIFE flow | yes |
| grassland2 | 6 | LIFE flow | yes |
| indoor | 6 | CV2/SIFT | — |
| lake | 6 | LIFE flow | — |
| meadow | 6 | LIFE flow | — |
| parking | 7 | LIFE flow | — |
| pillar | 6 | LIFE flow | — |
| playground | 7 | LIFE flow | — |
| rail | 7 | LIFE flow | — |
| road | 7 | LIFE flow | — |
| sand | 6 | CV2/SIFT | — |
| seaside | 8 | CV2/SIFT | — |
| stairs | 6 | LIFE flow | yes |
| statue | 6 | LIFE flow | yes |
| statue2 | 6 | LIFE flow | yes |
| table_tennis | 6 | LIFE flow | yes |
| wall | 6 | LIFE flow | — |
| yatai | 7 | LIFE flow | — |
## Temporal Alignment
Photos are aligned to `time0` of each scene. Two methods are used depending on scene content:
- **LIFE optical flow** (26 scenes): dense flow-based warping, handles gradual lighting changes and small camera motion
- **CV2/SIFT homography** (4 scenes: `cabin`, `indoor`, `sand`, `seaside`): feature-based homography, used when flow alignment fails due to detailed textures.
Alignment is computed independently for `ori` and `small` resolutions. Environment maps are aligned using phase-correlation-based rotation estimation.
## License
This dataset is released under the [Creative Commons Attribution 4.0 International (CC BY 4.0)](https://creativecommons.org/licenses/by/4.0/) license.
<!-- ## Citation
If you use this dataset, please cite:
```bibtex
@inproceedings{wildrelight2026,
title = {TODO},
author = {TODO},
booktitle = {TODO},
year = {2026},
}
``` -->
|