Methods › Computer Vision › Feature Extractors › Panoptic FPN
Panoptic FPN
Introduced by Alexander Kirillov et al. in Panoptic Feature Pyramid Networks
archive 2025-07-28 Description, source and code snippet are the archive's method entry.
A Panoptic FPN is an extension of an FPN that can generate both instance and semantic segmentations via FPN. The approach starts with an FPN backbone and adds a branch for performing semantic segmentation in parallel with the existing region-based branch for instance segmentation. No changes are made to the FPN backbone when adding the dense-prediction branch, making it compatible with existing instance segmentation methods.
The new semantic segmentation branch achieves its goal as follows. Starting from the deepest FPN level (at 1/32 scale), we perform three upsampling stages to yield a feature map at 1/4 scale, where each upsampling stage consists of 3×3 convolution, group norm, ReLU, and 2× bilinear upsampling. This strategy is repeated for FPN scales 1/16, 1/8, and 1/4 (with progressively fewer upsampling stages). The result is a set of feature maps at the same 1/4 scale, which are then element-wise summed. A final 1×1 convolution, 4× bilinear upsampling, and softmax are used to generate the per-pixel class labels at the original image resolution. In addition to stuff classes, this branch also outputs a special ‘other’ class for all pixels belonging to objects (to avoid predicting stuff classes for such pixels).
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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PointRend: Image Segmentation as Rendering 17 Dec 2019 · 14 repositories · arXiv:1912.08193Syntology ran 5 of 18 samples · 13 unverified
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IMP: Instance Mask Projection for High Accuracy Semantic Segmentation of Things 15 Jun 2019 · 0 repositories · arXiv:1906.06597
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Panoptic Feature Pyramid Networks 8 Jan 2019 · 12 repositories · arXiv:1901.02446Syntology ran 7 of 12 samples · 5 unverified
Tasks archive 2025-07-28
8 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 |
|---|---|
| Instance Segmentation | 3 |
| Segmentation | 3 |
| Semantic Segmentation | 3 |
| Image Segmentation | 1 |
| Panoptic Segmentation | 1 |
| Scene Segmentation | 1 |
| Thermal Image Segmentation | 1 |
| Vocal Bursts Intensity Prediction | 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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