YOLOv8-16bit/docs/reference/yolo/utils/loss.md

---
description: Learn about Varifocal Loss and Keypoint Loss in Ultralytics YOLO for advanced bounding box and pose estimation. Visit our docs for more.
keywords: Ultralytics, YOLO, loss functions, object detection, keypoint detection, segmentation, classification
---

# VarifocalLoss
---
:::ultralytics.yolo.utils.loss.VarifocalLoss
<br><br>

# FocalLoss
---
:::ultralytics.yolo.utils.loss.FocalLoss
<br><br>

# BboxLoss
---
:::ultralytics.yolo.utils.loss.BboxLoss
<br><br>

# KeypointLoss
---
:::ultralytics.yolo.utils.loss.KeypointLoss
<br><br>

# v8DetectionLoss
---
:::ultralytics.yolo.utils.loss.v8DetectionLoss
<br><br>

# v8SegmentationLoss
---
:::ultralytics.yolo.utils.loss.v8SegmentationLoss
<br><br>

# v8PoseLoss
---
:::ultralytics.yolo.utils.loss.v8PoseLoss
<br><br>

# v8ClassificationLoss
---
:::ultralytics.yolo.utils.loss.v8ClassificationLoss
<br><br>