---
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
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# VarifocalLoss
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:::ultralytics.yolo.utils.loss.VarifocalLoss
# FocalLoss
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:::ultralytics.yolo.utils.loss.FocalLoss
# BboxLoss
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:::ultralytics.yolo.utils.loss.BboxLoss
# KeypointLoss
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:::ultralytics.yolo.utils.loss.KeypointLoss
# v8DetectionLoss
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:::ultralytics.yolo.utils.loss.v8DetectionLoss
# v8SegmentationLoss
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:::ultralytics.yolo.utils.loss.v8SegmentationLoss
# v8PoseLoss
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:::ultralytics.yolo.utils.loss.v8PoseLoss
# v8ClassificationLoss
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:::ultralytics.yolo.utils.loss.v8ClassificationLoss