|
|
--- |
|
|
language: |
|
|
- en |
|
|
size_categories: |
|
|
- 100K<n<1M |
|
|
task_categories: |
|
|
- image-classification |
|
|
pretty_name: DPChallenge Photo Metadata Dataset |
|
|
tags: |
|
|
- photography |
|
|
- image-quality |
|
|
- human-labels |
|
|
- ratings |
|
|
- Evaluation |
|
|
--- |
|
|
|
|
|
# DPChallenge Photo Metadata Dataset |
|
|
|
|
|
## Dataset Description |
|
|
|
|
|
This dataset contains metadata and statistics from DPChallenge, a photography community platform where photographers participate in themed challenges and receive peer ratings. |
|
|
|
|
|
**Key Features:** |
|
|
- **Valuable Human Labels**: Contains human-scored quality ratings from multiple rater groups (all users, commenters, participants, non-participants) |
|
|
- **Collection Date**: Dec 2025 |
|
|
- **Data Quality**: |
|
|
- Only includes images with complete statistics |
|
|
- Scores validated and corrected for parsing errors (original scrape had ~1,400 rows with incorrectly parsed scores from user comments) |
|
|
- Score range: 2.0 - 8.6 (realistic competition scores) |
|
|
|
|
|
**Note**: In all columns, a value of `0` represents N/A (not available/not applicable). |
|
|
|
|
|
## Dataset Structure |
|
|
|
|
|
### Data Splits |
|
|
|
|
|
- **Train**: 184,895 images (90%) |
|
|
- **Test**: 20,544 images (10%) |
|
|
|
|
|
The test set is stratified by score bins (0-4, 5-6, 7-10) to ensure even distribution of image quality ratings. |
|
|
|
|
|
### Features |
|
|
|
|
|
- `image_id` (int): Unique identifier for the image |
|
|
- `gallery_id` (int): Challenge/gallery identifier |
|
|
- `gallery_name` (string): Name of the challenge/gallery |
|
|
- `title` (string): Photo title |
|
|
- `photographer` (string): Photographer username |
|
|
- `challenge` (string): Challenge theme |
|
|
- `editing_rule` (string): Editing rules (Basic/Advanced) |
|
|
- `camera` (string): Camera and lens information |
|
|
- `location` (string): Photo location |
|
|
- `date_uploaded` (string): Upload date |
|
|
- `place` (string): Additional location details |
|
|
- `total_entries` (int): Total entries in the challenge |
|
|
- `avg_all_users` (float): Average rating from all users (0-10 scale) |
|
|
- `avg_commenters` (float): Average rating from commenters |
|
|
- `avg_participants` (float): Average rating from challenge participants |
|
|
- `avg_nonparticipants` (float): Average rating from non-participants |
|
|
- `views_since_voting` (int): Views after voting period |
|
|
- `views_during_voting` (int): Views during voting period |
|
|
- `votes` (int): Number of votes received |
|
|
- `comments_count` (int): Number of comments |
|
|
- `favorites_count` (int): Number of times favorited |
|
|
- `image` (Image): The actual image file |
|
|
- `has_statistics` (bool): Whether full statistics are available |
|
|
|
|
|
### Score Distribution |
|
|
|
|
|
The dataset uses stratified sampling based on rounded `avg_all_users` scores (the main quality metric): |
|
|
- **0-4**: Low-rated images |
|
|
- **5-6**: Medium-rated images |
|
|
- **7-8+**: High-rated images (max score in dataset is ~8.6) |
|
|
|
|
|
Most scores fall in the 4-7 range, with very few extreme scores. This reflects real-world photography competition dynamics where truly exceptional images are rare. |
|
|
|
|
|
### Rating Statistics |
|
|
|
|
|
Statistics for human label scores across the dataset: |
|
|
|
|
|
| Metric | Min | Max | Mean | Std | |
|
|
|--------|-----|-----|------|-----| |
|
|
| `avg_all_users` | 2.00 | 8.60 | 5.45 | 0.73 | |
|
|
| `avg_commenters` | 1.00 | 10.00 | 6.28 | 1.32 | |
|
|
| `avg_participants` | 1.77 | 9.33 | 5.29 | 0.75 | |
|
|
| `avg_nonparticipants` | 1.96 | 8.62 | 5.57 | 0.74 | |
|
|
|
|
|
**Note**: `avg_all_users` is used as the primary splitting criterion for stratified train/test split to ensure balanced quality distribution. |
|
|
|
|
|
## Source Data |
|
|
|
|
|
Data scraped from [DPChallenge](https://www.dpchallenge.com/) public photo galleries. This dataset includes both images and metadata. |
|
|
|
|
|
|
|
|
## Citation |
|
|
|
|
|
If you use this dataset, please cite DPChallenge as the source of the data: |
|
|
``` |
|
|
DPChallenge Photography Community |
|
|
https://www.dpchallenge.com/ |
|
|
``` |
|
|
|
|
|
## License |
|
|
|
|
|
This dataset contains metadata from publicly available information on DPChallenge. Images remain the property of their respective photographers. Please respect copyright and usage terms. |
|
|
|
