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---
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>