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description: Explore Ultralytics YOLO metrics tools - from confusion matrix, detection metrics, pose metrics to box IOU. Learn how to compute and plot precision-recall curves.
keywords: Ultralytics, YOLO, YOLOv3, YOLOv4, metrics, confusion matrix, detection metrics, pose metrics, box IOU, mask IOU, plot precision-recall curves, compute average precision
---

# Reference for `ultralytics/utils/metrics.py`

!!! note

    This file is available at [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/utils/metrics.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/utils/metrics.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/metrics.py) 🛠️. Thank you 🙏!

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## ::: ultralytics.utils.metrics.ConfusionMatrix
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## ::: ultralytics.utils.metrics.Metric
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## ::: ultralytics.utils.metrics.DetMetrics
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## ::: ultralytics.utils.metrics.SegmentMetrics
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## ::: ultralytics.utils.metrics.PoseMetrics
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## ::: ultralytics.utils.metrics.ClassifyMetrics
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## ::: ultralytics.utils.metrics.bbox_ioa
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## ::: ultralytics.utils.metrics.box_iou
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## ::: ultralytics.utils.metrics.bbox_iou
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## ::: ultralytics.utils.metrics.mask_iou
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## ::: ultralytics.utils.metrics.kpt_iou
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## ::: ultralytics.utils.metrics.smooth_BCE
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## ::: ultralytics.utils.metrics.smooth
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## ::: ultralytics.utils.metrics.plot_pr_curve
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## ::: ultralytics.utils.metrics.plot_mc_curve
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## ::: ultralytics.utils.metrics.compute_ap
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## ::: ultralytics.utils.metrics.ap_per_class
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