yolov26_3d/docs/en/reference/models/utils/loss.md

description, keywords

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

Reference for ultralytics/models/utils/loss.py

!!! success "Improvements"

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

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

---

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