---
title: trackers.utils.matching API Reference
description: Explore the utility functions for matching in trackers used by Ultralytics, including linear assignment, IoU distance, embedding distance, and more.
keywords: Ultralytics, matching utils, linear assignment, IoU distance, embedding distance, fuse score, tracking, Python, documentation
---

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

!!! success "Improvements"

    This page is sourced from [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/trackers/utils/matching.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/trackers/utils/matching.py). Have an improvement or example to add? Open a [Pull Request](https://docs.ultralytics.com/help/contributing) — thank you! 🙏

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## ::: ultralytics.trackers.utils.matching.linear_assignment

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## ::: ultralytics.trackers.utils.matching.iou_distance

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## ::: ultralytics.trackers.utils.matching.embedding_distance

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## ::: ultralytics.trackers.utils.matching.fuse_score

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