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description: Discover details for "HungarianMatcher" & "inverse_sigmoid" functions in Ultralytics YOLO, advanced tools supporting detection models.
keywords: Ultralytics, YOLO, HungarianMatcher, inverse_sigmoid, detection models, model utilities, ops
---

## HungarianMatcher
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### ::: ultralytics.models.utils.ops.HungarianMatcher
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## get_cdn_group
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### ::: ultralytics.models.utils.ops.get_cdn_group
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## inverse_sigmoid
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### ::: ultralytics.models.utils.ops.inverse_sigmoid
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