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--- |
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license: eupl-1.1 |
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language: |
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- nl |
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--- |
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# Vuurwerkverkenner |
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This dataset is used by the Vuurwerkverkenner, an application for linking snippets of exploded (heavy) fireworks to the type of firework that they originate from. |
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You may find the application at [www.vuurwerkverkenner.nl](https://www.vuurwerkverkenner.nl). |
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The dataset consists of different types of fireworks that were investigated in casework by the Netherlands Forensic Institute. |
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## Categories |
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If firework wrappers are very similar in their visual appearance, they may be grouped into categories. |
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In most cases, a wrapper is not similar to any other wrapper, and a category simply consists of one unique wrapper. |
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## Contents |
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The dataset consists of 185 categories, containing 332 unique wrappers in total. The dataset is organized as follows: |
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``` |
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vuurwerkverkenner-data |
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└───fireworks_0 |
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└─── wrappers |
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└─── 0 |
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└─── wrapper.jpg |
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└─── compleet exemplaar.jpg |
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└─── gedemonteerd.jpg |
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└─── 1 |
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└─── wrapper.jpg |
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└─── compleet exemplaar.jpg |
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└─── gedemonteerd.jpg |
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└───fireworks_1 |
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└─── wrappers |
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└─── 0 |
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└─── wrapper.jpg |
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└───meta.json.gz |
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``` |
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The first level of folders (`fireworks_0`, `fireworks_1`, ...) corresponds to the category. |
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The third level (`0`, `1`, ...) corresponds to the wrappers within the category. |
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For each wrapper, one or multiple images may be present. |
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In each case, `wrapper.jpg` should be present, which is a scan of the full wrapper. |
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Additionally, other images may be present as well, such as the entire fireworks article or a schematic drawing of its contents. |
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In `meta.json.gz`, we store both *metadata* and *reference embeddings* for the firework categories. It has the following structure: |
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``` |
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{ |
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0: { |
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"embeddings": [[...], [...], ...], |
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"wrappers": [ |
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0: { |
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"wrapper_text": "abcdef", |
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"article_name": "abc", |
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... |
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}, |
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1: {...}, |
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2: {...} |
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] |
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}, |
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1: {...} |
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} |
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``` |
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The first level (`meta[0]`, `meta[1]`, `meta[2]` ...) indicates the fireworks category, which corresponds to the first level of the photo folders (i.e. `meta[0]` matches the folder `fireworks_0`). |
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Each category contains the reference embeddings and the metadata for each wrapper. |
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The third level, e.g. `meta[0]['wrappers’][0]`, indicates the wrapper within the category and corresponds to the photo folder of that wrapper (e.g. `fireworks_0/wrappers/0`). |
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### _Reference embeddings_ |
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For each category, reference embeddings are provided. |
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They are constructed by an AI model that is trained to create embeddings for (photos of) firework wrappers and snippets of exploded wrappers. |
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When fed to this model, photos of snippets that belong to a given category should have similar embeddings to the ones for the wrappers. |
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For more details about the model, see (here)[https://huggingface.co/NetherlandsForensicInstitute/vuurwerkverkenner]. |
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### _Metadata_ |
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For each wrapper, metadata is provided. The fields are described below. |
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| Field | Description | |
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|-------------------------------|-----------------------------------------------------| |
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| `text` | The full text that is on the wrapper (excluding non-Latin alphabets). | |
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| `endangerment` | The level of danger or risk associated with the firework. | |
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| `article_name` | The name of the item. | |
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| `firework_type` | The type of firework. | |
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| `firework_category` | The category or classification of the firework. | |
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| `tube_length` | The length of the tube. | |
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| `tube_diameter` | The diameter of the tube. | |
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| `composition_burst_charge` | The composition of the main charge of the firework. | |
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| `composition_other_mixtures` | The composition of other charges of the firework. | |
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| `mass_burst_charge` | The mass of the main charge. | |
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| `mass_other_mixtures` | The mass of other charges. | |
