ultralytics/docs/en/reference/models/utils/loss.md

metadata

description: >-
  Explore detailed implementations of loss functions for DETR and RT-DETR models
  in Ultralytics.
keywords: >-
  ultralytics, YOLO, DETR, RT-DETR, loss functions, object detection, deep
  learning, focal loss, varifocal loss, Hungarian matcher

Reference for ultralytics/models/utils/loss.py

!!! Note

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

::: ultralytics.models.utils.loss.DETRLoss

---

::: ultralytics.models.utils.loss.RTDETRDetectionLoss