---
title: trackers.fast_tracker API Reference
description: Explore the FastTracker module in Ultralytics for occlusion-aware multi-object tracking with Kalman rollback and init-IoU suppression. Learn about its classes, methods, and attributes.
keywords: Ultralytics, FastTracker, FASTTracker, occlusion-aware, object tracking, Kalman filter, YOLO, documentation
---

# Reference for `ultralytics/trackers/fast_tracker.py`

!!! success "Improvements"

    This page is sourced from [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/trackers/fast_tracker.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/trackers/fast_tracker.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.fast_tracker.FastSTrack

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## ::: ultralytics.trackers.fast_tracker.FASTTracker

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