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ultralytics/docs/en/reference/utils/loss.md
Glenn Jocher 3637f509dd
ultralytics 8.3.231 New Zensical docs refresh (#22761) 
Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>
Co-authored-by: UltralyticsAssistant <web@ultralytics.com>
2025-11-23 19:53:50 +01:00

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Explore detailed descriptions and implementations of various loss functions used in Ultralytics models, including Varifocal Loss, Focal Loss, Bbox Loss, and more. Ultralytics, loss functions, Varifocal Loss, Focal Loss, Bbox Loss, Rotated Bbox Loss, Keypoint Loss, YOLO, model training, documentation

Reference for ultralytics/utils/loss.py

!!! success "Improvements"

This page is sourced from [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/utils/loss.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/utils/loss.py). Have an improvement or example to add? Open a [Pull Request](https://docs.ultralytics.com/help/contributing/) — thank you! 🙏

::: ultralytics.utils.loss.VarifocalLoss




::: ultralytics.utils.loss.FocalLoss




::: ultralytics.utils.loss.DFLoss




::: ultralytics.utils.loss.BboxLoss




::: ultralytics.utils.loss.RotatedBboxLoss




::: ultralytics.utils.loss.KeypointLoss




::: ultralytics.utils.loss.v8DetectionLoss




::: ultralytics.utils.loss.v8SegmentationLoss




::: ultralytics.utils.loss.v8PoseLoss




::: ultralytics.utils.loss.v8ClassificationLoss




::: ultralytics.utils.loss.v8OBBLoss




::: ultralytics.utils.loss.E2EDetectLoss




::: ultralytics.utils.loss.TVPDetectLoss




::: ultralytics.utils.loss.TVPSegmentLoss