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docs/en/reference/utils/loss.md

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+---
+description: Explore Ultralytics' versatile loss functions - VarifocalLoss, BboxLoss, v8DetectionLoss, v8PoseLoss. Improve your accuracy on YOLO implementations.
+keywords: Ultralytics, Loss functions, VarifocalLoss, BboxLoss, v8DetectionLoss, v8PoseLoss, YOLO, Ultralytics Documentation
+---
+
+# Reference for `ultralytics/utils/loss.py`
+
+!!! Note
+
+    This file is available at [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/utils/loss.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/utils/loss.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/loss.py) 🛠️. Thank you 🙏!
+
+<br><br>
+
+## ::: ultralytics.utils.loss.VarifocalLoss
+
+<br><br>
+
+## ::: ultralytics.utils.loss.FocalLoss
+
+<br><br>
+
+## ::: ultralytics.utils.loss.BboxLoss
+
+<br><br>
+
+## ::: ultralytics.utils.loss.RotatedBboxLoss
+
+<br><br>
+
+## ::: ultralytics.utils.loss.KeypointLoss
+
+<br><br>
+
+## ::: ultralytics.utils.loss.v8DetectionLoss
+
+<br><br>
+
+## ::: ultralytics.utils.loss.v8SegmentationLoss
+
+<br><br>
+
+## ::: ultralytics.utils.loss.v8PoseLoss
+
+<br><br>
+
+## ::: ultralytics.utils.loss.v8ClassificationLoss
+
+<br><br>
+
+## ::: ultralytics.utils.loss.v8OBBLoss
+
+<br><br>