| --- |
| license: apache-2.0 |
| tags: |
| - onnx |
| - background-removal |
| - salient-object-detection |
| - segmentation |
| - qtmesheditor |
| library_name: onnx |
| pipeline_tag: image-segmentation |
| --- |
| |
| # U²-Net — ONNX (background removal) |
|
|
| **U²-Net** (Qin et al., *"U²-Net: Going Deeper with Nested U-Structure for |
| Salient Object Detection"*, 2020) as the standard `u2net.onnx` used by |
| [rembg](https://github.com/danielgatis/rembg) — Apache-2.0. All credit to the |
| U²-Net authors. |
|
|
| Mirrored for **[QtMeshEditor](https://github.com/fernandotonon/QtMeshEditor)** |
| (epic #764), where it isolates the subject before single-image 3D |
| reconstruction: `qtmesh generate3d --remove-bg`, the GUI "Remove background" |
| checkbox, and the `remove_bg` MCP arg. |
|
|
| > The file QtMeshEditor downloads at runtime lives in the shared |
| > [`fernandotonon/QtMeshEditor-models`](https://huggingface.co/fernandotonon/QtMeshEditor-models) |
| > repo under `rembg/`. This repo is the standalone model card + mirror. |
|
|
| ## I/O |
|
|
| `[1,3,320,320]` float NCHW → `[1,1,320,320]` saliency in `[0,1]`. |
|
|
| QtMeshEditor's usage notes: composite the masked subject over **gray-128** |
| for TripoSR (white reconstructs as a wall) but over **white** for TripoSG |
| (its reference pipeline), then crop/re-pad to a 0.85 foreground ratio. |
|
|
| ## License |
|
|
| Apache-2.0 (upstream U²-Net). Credit: Xuebin Qin et al. |
|
|
