6chan/cleveland-style

Cleveland Museum of Art CC0 Style Reference Benchmark Dataset

Scope & Exclusions: This dataset contains ONLY public domain style reference images from the Cleveland Museum of Art. It does NOT contain any COCO content images, WikiArt, Fons, or third-party proprietary assets.

Dataset Structure

.
├── README.md                           # Dataset Card
├── LICENSE                             # Dual-boundary license declaration
├── data/
│   ├── style_registry.csv              # Primary metadata table with accession numbers and SHA256 hashes
│   ├── images_raw/                     # Original high-resolution public domain artwork images
│   └── images_square_512/              # Derived 512x512 inputs (deterministic centre crop + Lanczos)
├── metadata/
│   ├── source_credits.csv              # Attribution and museum source records
│   └── preprocessing.json              # Preprocessing policy and PIL version record
└── scripts/
    └── prepare_square_style_candidate_assets.py # Reproducible asset preparation script

Dataset Contents & Metadata

The dataset consists of public domain artworks representing diverse artistic styles (e.g., De Stijl, Expressionism, Cubism, Vorticism, Impressionism, Post-Impressionism, Naïve Art, Pointillism).

Stable ID	Accession Number	Title	Artist	License
B01	1967.215	Composition with Red, Yellow, and Blue	Piet Mondrian	CC0
B02	1966.49	Wrestlers in a Circus	Ernst Ludwig Kirchner	CC0
B03	2006.139	Night Café	Louis Marcoussis	CC0
B04	1987.50	Illustration (Typhoon)	Edward Wadsworth	CC0
B05	1960.81	Water Lilies (Agapanthus)	Claude Monet	CC0
B06	1947.209	The Large Plane Trees	Vincent van Gogh	CC0
B07	1926.1653	On the Beach, No. 3	Maurice Prendergast	CC0
B08	1983.185	Woman with Red Hair and Green Eyes	Edvard Munch	CC0
B09	1953.212	Under the Trees	Édouard Vuillard	CC0
B10	1929.951	Outskirts of Paris	Henri Rousseau	CC0
B11	1958.344	At the Concert Parisien	Georges Seurat	CC0
B12	1958.21	Mount Sainte-Victoire	Paul Cézanne	CC0

Preprocessing & Verification Pipeline

1. Source Download: Original images downloaded directly from the Cleveland Museum of Art Open Access API print/web image endpoints.
2. Derivation Policy: 512×512 square inputs generated via deterministic centre crop followed by Lanczos resampling (centering=(0.5, 0.5)), preventing aspect ratio distortion.
3. Integrity Checks:
   • SHA256 cryptographic hashes verified for both raw and 512×512 derived images.
   • PIL image loading verified for valid RGB/JPEG channels and dimensions.
   • Per-artwork share_license_status verified directly against the Cleveland API.

Intended Use & Known Limitations

• Intended Use: Evaluation of training-free multimodal diffusion models (e.g., BAGEL, ConsistCompose) on dual-reference style transfer tasks (content reference + style reference -> stylized output).
• Known Limitations:
  • Style reference images may contain distinct spatial layouts, human figures, or semantic subjects (e.g., Kirchner's wrestlers, Munch's portrait, Prendergast's beach scene). Evaluators MUST conduct explicit reference leakage audits to ensure the model transfers rendering style rather than copying style-image semantics/layouts.
  • This dataset does NOT claim to represent an exhaustive distribution of historical art styles, nor does it represent all digital art or watercolor media.

Citation & Attribution

When using this dataset, please credit the Cleveland Museum of Art Open Access Initiative:

The Cleveland Museum of Art Open Access Initiative (CC0 1.0 Universal)
https://clevelandart.org/open-access