docs/en/reference/utils/metrics.md

---
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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