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---
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description: Explore Ultralytics' versatile loss functions - VarifocalLoss, BboxLoss, v8DetectionLoss, v8PoseLoss. Improve your accuracy on YOLO implementations.
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keywords: Ultralytics, Loss functions, VarifocalLoss, BboxLoss, v8DetectionLoss, v8PoseLoss, YOLO, Ultralytics Documentation
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---
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## VarifocalLoss
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---
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### ::: ultralytics.utils.loss.VarifocalLoss
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<br><br>
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## FocalLoss
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---
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### ::: ultralytics.utils.loss.FocalLoss
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<br><br>
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## BboxLoss
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---
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### ::: ultralytics.utils.loss.BboxLoss
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<br><br>
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## KeypointLoss
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---
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### ::: ultralytics.utils.loss.KeypointLoss
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<br><br>
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## v8DetectionLoss
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---
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### ::: ultralytics.utils.loss.v8DetectionLoss
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<br><br>
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## v8SegmentationLoss
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---
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### ::: ultralytics.utils.loss.v8SegmentationLoss
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<br><br>
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## v8PoseLoss
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---
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### ::: ultralytics.utils.loss.v8PoseLoss
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<br><br>
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## v8ClassificationLoss
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---
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### ::: ultralytics.utils.loss.v8ClassificationLoss
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<br><br>
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