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description: Explore in-depth guidance for using Ultralytics trackers utils matching, including merge_matches, linear_assignment, iou_distance, embedding_distance, fuse_motion, and fuse_score.
keywords: Ultralytics, Trackers Utils, Matching, merge_matches, linear_assignment, iou_distance, embedding_distance, fuse_motion, fuse_score, documentation
---

# Reference for `ultralytics/trackers/utils/matching.py`

!!! note

    Full source code for this file is available at [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/trackers/utils/matching.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/trackers/utils/matching.py).

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## ::: ultralytics.trackers.utils.matching.merge_matches
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## ::: ultralytics.trackers.utils.matching._indices_to_matches
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## ::: ultralytics.trackers.utils.matching.linear_assignment
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## ::: ultralytics.trackers.utils.matching.ious
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## ::: ultralytics.trackers.utils.matching.iou_distance
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## ::: ultralytics.trackers.utils.matching.v_iou_distance
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## ::: ultralytics.trackers.utils.matching.embedding_distance
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## ::: ultralytics.trackers.utils.matching.gate_cost_matrix
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## ::: ultralytics.trackers.utils.matching.fuse_motion
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## ::: ultralytics.trackers.utils.matching.fuse_iou
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## ::: ultralytics.trackers.utils.matching.fuse_score
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## ::: ultralytics.trackers.utils.matching.bbox_ious
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