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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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# NFI Fireworks training dataset for the "Vuurwerkverkenner" application |
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The Netherlands Forensic Institute (NFI) Fireworks training dataset consists of scans of fireworks wrappers from fireworks that were investigated in casework in |
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the Netherlands between 2010 and early 2024. For a subset of these wrappers, photographs of fireworks snippets (pieces of the wrapper after the detonation) were added. |
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## Data overview |
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The data consists of 331 wrappers in 184 categories. There are 37 categories with more than one wrapper, and snippets are available for 38 wrapper categories. |
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### Data collection |
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For the fireworks wrappers, all wrappers physically available at the NFI Explosives team from casework between 2010-2024 were scanned. |
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For the collection of the fireworks snippets, fireworks were exploded and snippets that resulted were gathered by hand. Snippets were cleaned, dried and sorted by wrapper. |
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Snippets were then photographed on a white background. One snippet photo contains multiple snippets. |
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Sampling was done based on availability of fireworks in the data collection period. To diversify and increase the dataset, additional wrappers were chosen to print and glue |
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to Cobra 6 fireworks. This selection was done in collaboration with domain experts. |
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## Data structure |
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Each folder (e.g. fireworks_0) is a firework category. Firework types have been grouped if wrappers were the same or very similar. For instance, variants of the same fireworks |
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from different years, such as a Cobra 6 from 2018 and 2019, were considered very similar. Wrappers were categorised in collaboration with domain experts. |
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Each folder contains at least one wrapper. Additionally, a folder can contain multiple snippet photos (snippets_0.jpg, snippets_1.jpg etc.) if they were available for that wrapper category. |
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The data structure visualised: |
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``` |
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└─── fireworks_0 |
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└───wrapper_0.jpg |
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└───wrapper_1.jpg |
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└───wrapper_2.jpg |
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└───snippets_0.jpg |
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└───snippets_1.jpg |
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└─── fireworks_1 |
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└─── wrapper_0.jpg |
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└─── fireworks_2 |
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└─── wrapper_0.jpg |
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└─── wrapper_1.jpg |
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└─── fireworks_2 |
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└─── wrapper_0.jpg |
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└─── snippets_0.jpg |
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``` |
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## Firework wrappers |
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Wrappers have been scanned and the images have been reduced in size to a maximum of 2000 pixels in either height or width. |
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### Categorisation |
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Categories with more than one wrapper: |
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| Category | Number of wrappers | |
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| --------------- | ------------------ | |
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| fireworks_2 | 2 | |
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| fireworks_6 | 2 | |
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| fireworks_12 | 3 | |
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| fireworks_13 | 2 | |
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| fireworks_17 | 2 | |
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| fireworks_24 | 2 | |
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| fireworks_25 | 2 | |
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| fireworks_30 | 3 | |
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| fireworks_32 | 2 | |
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| fireworks_33 | 2 | |
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| fireworks_37 | 3 | |
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| fireworks_46 | 3 | |
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| fireworks_51 | 5 | |
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| fireworks_53 | 2 | |
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| fireworks_56 | 3 | |
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| fireworks_59 | 3 | |
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| fireworks_61 | 58 | |
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| fireworks_62 | 9 | |
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| fireworks_63 | 2 | |
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| fireworks_64 | 3 | |
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| fireworks_74 | 2 | |
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| fireworks_78 | 3 | |
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| fireworks_82 | 4 | |
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| fireworks_92 | 2 | |
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| fireworks_97 | 2 | |
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| fireworks_111 | 2 | |
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| fireworks_117 | 2 | |
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| fireworks_135 | 2 | |
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| fireworks_139 | 4 | |
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| fireworks_144 | 8 | |
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| fireworks_145 | 11 | |
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| fireworks_151 | 12 | |
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| fireworks_153 | 4 | |
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| fireworks_154 | 4 | |
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| fireworks_158 | 3 | |
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| fireworks_166 | 2 | |
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| fireworks_179 | 4 | |
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Categories with snippet collections: |
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| Category | Number of snippet collections | |
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| --------------- | ------------------------------ | |
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| fireworks_8 | 3 | |
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| fireworks_12 | 4 | |
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| fireworks_17 | 6 | |
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| fireworks_30 | 1 | |
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| fireworks_37 | 1 | |
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| fireworks_38 | 3 | |
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| fireworks_47 | 1 | |
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| fireworks_54 | 6 | |
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| fireworks_58 | 5 | |
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| fireworks_59 | 6 | |
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| fireworks_61 | 14 | |
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| fireworks_62 | 1 | |
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| fireworks_71 | 3 | |
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| fireworks_75 | 2 | |
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| fireworks_82 | 2 | |
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| fireworks_86 | 6 | |
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| fireworks_87 | 2 | |
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| fireworks_95 | 1 | |
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| fireworks_97 | 2 | |
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| fireworks_105 | 1 | |
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| fireworks_106 | 1 | |
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| fireworks_116 | 4 | |
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| fireworks_119 | 1 | |
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| fireworks_129 | 1 | |
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| fireworks_137 | 1 | |
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| fireworks_139 | 5 | |
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| fireworks_144 | 5 | |
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| fireworks_145 | 16 | |
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| fireworks_148 | 2 | |
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| fireworks_153 | 11 | |
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| fireworks_154 | 2 | |
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| fireworks_158 | 3 | |
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| fireworks_160 | 1 | |
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| fireworks_169 | 3 | |
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| fireworks_174 | 1 | |
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| fireworks_176 | 2 | |
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| fireworks_179 | 1 | |
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| fireworks_182 | 3 | |
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## Training |
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The steps followed at the NFI to actually train the model with these data, are described in the model card of the Vuurwerkverkenner at https://huggingface.co./NetherlandsForensicInstitute/vuurwerkverkenner (also linked to this data set). |
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### Possible bias |
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The reference set of firework wrappers is dependent on which fireworks were investigated by the NFI. |
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This may not be representative for fireworks in other countries or in the future. |
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Data collection of snippets was influenced by the availability of fireworks. Due to low availability, some snippets are the result of |
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wrappers glued to Cobra 6 fireworks instead of the original fireworks. We noticed that these wrappers tended to detach more easily than wrappers on |
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original firework. This may have influenced the snippet creation. |
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Very small snippets were not included in our dataset. |
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