Methods › Computer Vision › Anchor Supervision › FreeAnchor
FreeAnchor
Introduced by Xiaosong Zhang et al. in FreeAnchor: Learning to Match Anchors for Visual Object Detection
archive 2025-07-28 Description, source and code snippet are the archive's method entry.
FreeAnchor is an anchor supervision method for object detection. Many CNN-based object detectors assign anchors for ground-truth objects under the restriction of object-anchor Intersection-over-Unit (IoU). In contrast, FreeAnchor is a learning-to-match approach that breaks the IoU restriction, allowing objects to match anchors in a flexible manner. It updates hand-crafted anchor assignment to free anchor matching by formulating detector training as a maximum likelihood estimation (MLE) procedure. FreeAnchor targets at learning features which best explain a class of objects in terms of both classification and localization.
Papers archive 2025-07-28
3 shown of 3, newest first. Repository counts are the archive's code-links table. A Syntology line states what Syntology ran from that paper's harvested code; it is per sample and not a correctness claim.
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UniHead: Unifying Multi-Perception for Detection Heads 23 Sep 2023 · 1 repository · arXiv:2309.13242
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Operationalizing Convolutional Neural Network Architectures for Prohibited Object Detection in X-Ray Imagery 10 Oct 2021 · 0 repositories · arXiv:2110.04906
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FreeAnchor: Learning to Match Anchors for Visual Object Detection 5 Sep 2019 · 4 repositories · arXiv:1909.02466Syntology ran 3 of 3 samples · 0 unverified
Tasks archive 2025-07-28
6 tasks the archive attaches to papers tagged with this method, by distinct papers. A task without a page in the catalog is plain text.
| Task | Papers |
|---|---|
| Object Detection | 2 |
| object-detection | 2 |
| Data Augmentation | 1 |
| Data Compression | 1 |
| Image Compression | 1 |
| Object | 1 |
Usage over time archive 2025-07-28
Components: the archive holds no method-to-method composition, so PwC's Components table cannot be rebuilt; the Papers list carries no Results column for the same reason (the archive does not join its leaderboard rows to method tags).
Categories archive 2025-07-28
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