| ---
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| description: Explore Ultralytics utilities for bounding boxes and instances, providing detailed documentation on handling bbox formats, conversions, and more.
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| keywords: Ultralytics, bounding boxes, Instances, bbox formats, conversions, AI, deep learning, YOLO, xyxy, xywh, ltwh
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| ---
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| # Reference for `ultralytics/utils/instance.py`
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| !!! note
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| This file is available at [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/utils/instance.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/utils/instance.py). If you spot a problem please help fix it by [contributing](https://docs.ultralytics.com/help/contributing/) a [Pull Request](https://github.com/ultralytics/ultralytics/edit/main/ultralytics/utils/instance.py) 🛠️. Thank you 🙏!
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| <br>
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| ## ::: ultralytics.utils.instance.Bboxes
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| <br><br><hr><br>
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| ## ::: ultralytics.utils.instance.Instances
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| <br><br><hr><br>
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| ## ::: ultralytics.utils.instance._ntuple
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| <br><br>
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| |
