| --- |
| license: cc-by-4.0 |
| task_categories: |
| - image-to-image |
| - unconditional-image-generation |
| tags: |
| - microscopy |
| - electron-microscopy |
| - STEM |
| - materials-science |
| - webdataset |
| size_categories: |
| - 10K<n<100K |
| configs: |
| - config_name: default |
| data_files: |
| - split: train |
| path: "train-*.tar" |
| --- |
| |
| # Warwick STEM Dataset (WebDataset) |
|
|
| A collection of 19,769 experimental scanning transmission electron microscopy (STEM) images from the University of Warwick, spanning hundreds of diverse materials projects collected between 2010 and 2018. |
|
|
| ## Dataset Description |
|
|
| This dataset contains experimental STEM images originally published as part of the [Warwick Electron Microscopy Datasets](https://github.com/Jeffrey-Ede/datasets) by Jeffrey Ede. The images cover a wide range of materials and imaging conditions, making them useful for self-supervised pre-training of microscopy foundation models. |
|
|
| ## Format |
|
|
| WebDataset format: 170 TAR shards (~1 GB each), 160 GB total. |
|
|
| Each sample in a shard contains: |
| - `{idx:06d}.tif` — 32-bit float TIFF image |
| - `{idx:06d}.json` — metadata |
|
|
| ### Metadata Fields |
|
|
| | Field | Type | Description | |
| |-------|------|-------------| |
| | `original_filename` | string | Original filename from the Warwick dataset | |
| | `width` | int | Image width in pixels | |
| | `height` | int | Image height in pixels | |
| | `dtype` | string | Pixel data type (float32) | |
| | `min_value` | float | Minimum pixel intensity | |
| | `max_value` | float | Maximum pixel intensity | |
| | `mean_value` | float | Mean pixel intensity | |
| | `std_value` | float | Standard deviation of pixel intensity | |
|
|
| ### Image Properties |
|
|
| - **Count:** 19,769 |
| - **Format:** 32-bit float TIFF |
| - **Resolutions:** Mixed — 2048x2048 (40%), 1024x1024 (34%), 512x512 (16%), other (10%) |
| - **Modality:** STEM (various detector configurations) |
| - **Instruments:** Multiple instruments at the University of Warwick (2010–2018) |
|
|
| ## Usage |
|
|
| ```python |
| import webdataset as wds |
| from torch.utils.data import DataLoader |
| |
| url = "path/to/warwick_stem_wds/train-{0000..0169}.tar" |
| dataset = wds.WebDataset(url).decode().shuffle(1000) |
| dataloader = DataLoader(dataset, batch_size=32, num_workers=4) |
| |
| for sample in dataloader: |
| image = sample[".tif"] |
| metadata = sample[".json"] |
| ``` |
|
|
| ## Source |
|
|
| Original data from [Jeffrey-Ede/datasets](https://github.com/Jeffrey-Ede/datasets) on GitHub. Please cite the original work if you use this dataset. |
|
|
| ## License |
|
|
| CC-BY-4.0 |
|
|
