---
license: mit
---

# Backbones

Backbone networks exported as PyTorch programs.

All models were pretrained on ImageNet and subsequently finetuned on a specific dataset.
Annotation data was converted for multi-label classification where applicable.

## Usage

Simply load the model in PyTorch and run inference to get a mapping of features.

```python
import torch
import torch.export

image = torch.randn((1, 3, 256, 256), dtype=torch.float32, requires_grad=False)

model = torch.export.load("resnet/resnet50-imagenet.pt2")
model.eval()

feats = model(image)

assert isinstance(feats, dict), type(feats)
assert feats["ext1"]
assert feats["ext2"]
assert feats["ext3"]
assert feats["ext4"]

```