| ---
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| license: other
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| language:
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| - en
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| tags:
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| - art
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| - painting
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| - hammershoi
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| - lora-training
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| - ideogram-4
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| task_categories:
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| - text-to-image
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| size_categories:
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| - n<1K
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| configs:
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| - config_name: default
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| data_files:
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| - split: train
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| path:
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| - train/*.png
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| - train/metadata.jsonl
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| - config_name: boxes
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| data_files:
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| - split: train
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| path:
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| - boxes/*.jpg
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| - boxes/metadata.jsonl
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| ---
|
|
|
| # Hammershøi Ideogram 4 Dataset
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|
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| 288 crops of paintings by Vilhelm Hammershøi (1864–1916), captioned for training an
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| [Ideogram 4](https://huggingface.co/ideogram-ai/ideogram-4-fp8) LoRA.
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|
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| Same images as [Hammershoi-Training-Dataset](https://huggingface.co/datasets/jejunepixels/Hammershoi-Training-Dataset)
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| minus one rejected crop, with new captions in Ideogram 4's structured JSON format.
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|
|
| ## Files
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|
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| `train/` holds `<name>.png`, `<name>.txt` (the JSON caption, for AI-Toolkit and similar trainers) and
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| `metadata.jsonl` (the same caption plus source and size, for the dataset viewer).
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|
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| `boxes/` holds copies of the images with their bounding boxes drawn on. Don't train on these.
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|
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| ## See the bounding boxes
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|
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| Open the [**boxes** subset in the viewer](https://huggingface.co/datasets/jejunepixels/Hammershoi-Ideogram4-Dataset/viewer/boxes) to see every image with its boxes drawn on.
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| Each box has a numbered tag, and the `boxes` column says what each number is. The `without_box` column lists elements
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| that have a description and no box.
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|
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| <p>
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| <img src="https://huggingface.co/datasets/jejunepixels/Hammershoi-Ideogram4-Dataset/resolve/main/boxes/portrait121.jpg" width="32%" alt="A woman at a window, with numbered bounding boxes on the figure, window and bed">
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| <img src="https://huggingface.co/datasets/jejunepixels/Hammershoi-Ideogram4-Dataset/resolve/main/boxes/interior026.jpg" width="32%" alt="A bust, a chest of drawers and a chair, each with a numbered bounding box">
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| <img src="https://huggingface.co/datasets/jejunepixels/Hammershoi-Ideogram4-Dataset/resolve/main/boxes/interior002.jpg" width="32%" alt="A room with a stove, a door and a wooden floor, each with a numbered bounding box">
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| </p>
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|
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| ## Captions
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| Compact JSON following the [Ideogram 4 caption schema](https://github.com/ideogram-oss/ideogram4/blob/main/docs/prompting.md).
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| `high_level_description` starts with the trigger `hmrsh painting: `. Bounding boxes are
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| `[y_min, x_min, y_max, x_max]` on a 0–1000 scale.
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|
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| Captions and boxes were drafted by Claude from the images and earlier captions, then reviewed and corrected by hand.
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| Boxes are close estimates, not pixel-exact. Some elements have a description and no box, where the reviewer removed the box.
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| Colour palettes are extracted from the pixels.
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|
|
| ## Sizes
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|
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| | Size | Images |
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| |---|---|
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| | 896×1152 | 91 |
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| | 1024×1024 | 77 |
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| | 768×1344 | 56 |
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| | 1152×896 | 32 |
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| | 1344×768 | 30 |
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| | 996×1152 | 2 |
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|
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| ## Sources
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|
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| Each row of `metadata.jsonl` names its source. They include museum collections and auction-house images.
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| The paintings are in the public domain; check the source of a reproduction before reusing it.
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|
|
