---
license: mit
tags:
  - kornia
  - feature-description
  - patch-descriptor
---

# kornia/sosnet

Pretrained weights for **SOSNet**,
used by [`kornia.feature.SOSNet`](https://kornia.readthedocs.io/en/latest/feature.html).

SOSNet is a 128-dimensional patch descriptor that adds a second-order similarity
regularisation term to the HardNet loss, enforcing that the structure of the descriptor
space reflects patch similarity at multiple scales. CVPR 2019.

**Original repo:** [yuruntian/SOSNet](https://github.com/yuruntian/SOSNet)

## Weights

| File | Training data |
|------|--------------|
| `sosnet_32x32_liberty.pth` | Liberty |
| `sosnet_32x32_hpatches_a.pth` | HPatches-A |

## Citation

```bibtex
@InProceedings{sosnet2019,
    author    = {Tian, Yurong and Yu, Xin and Fan, Bin and Wu, Fuchao
                 and Heijnen, Huub and Balntas, Vassileios},
    title     = {{SOSNet}: Second Order Similarity Regularization for
                 Local Descriptor Learning},
    booktitle = {CVPR},
    year      = {2019}
}
```