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---
tags:
- image-classification
- birder
- pytorch
library_name: birder
license: apache-2.0
---
# Model Card for convnext_v2_tiny_eu-common
A ConvNeXt v2 Tiny image classification model. This model was trained on the `eu-common` dataset containing common European bird species.
The species list is derived from the Collins bird guide [^1].
[^1]: Svensson, L., Mullarney, K., & Zetterström, D. (2022). Collins bird guide (3rd ed.). London, England: William Collins.
Note: A 256 x 256 variant of this model is available as `convnext_v2_tiny_eu-common256px`.
## Model Details
- **Model Type:** Image classification and detection backbone
- **Model Stats:**
- Params (M): 28.4
- Input image size: 384 x 384
- **Dataset:** eu-common (707 classes)
- **Papers:**
- ConvNeXt V2: Co-designing and Scaling ConvNets with Masked Autoencoders: <https://arxiv.org/abs/2301.00808>
## Model Usage
### Image Classification
```python
import birder
from birder.inference.classification import infer_image
(net, model_info) = birder.load_pretrained_model("convnext_v2_tiny_eu-common", inference=True)
# Note: A 256x256 variant is available as "convnext_v2_tiny_eu-common256px"
# Get the image size the model was trained on
size = birder.get_size_from_signature(model_info.signature)
# Create an inference transform
transform = birder.classification_transform(size, model_info.rgb_stats)
image = "path/to/image.jpeg" # or a PIL image, must be loaded in RGB format
(out, _) = infer_image(net, image, transform)
# out is a NumPy array with shape of (1, 707), representing class probabilities.
```
### Image Embeddings
```python
import birder
from birder.inference.classification import infer_image
(net, model_info) = birder.load_pretrained_model("convnext_v2_tiny_eu-common", inference=True)
# Get the image size the model was trained on
size = birder.get_size_from_signature(model_info.signature)
# Create an inference transform
transform = birder.classification_transform(size, model_info.rgb_stats)
image = "path/to/image.jpeg" # or a PIL image
(out, embedding) = infer_image(net, image, transform, return_embedding=True)
# embedding is a NumPy array with shape of (1, 768)
```
### Detection Feature Map
```python
from PIL import Image
import birder
(net, model_info) = birder.load_pretrained_model("convnext_v2_tiny_eu-common", inference=True)
# Get the image size the model was trained on
size = birder.get_size_from_signature(model_info.signature)
# Create an inference transform
transform = birder.classification_transform(size, model_info.rgb_stats)
image = Image.open("path/to/image.jpeg")
features = net.detection_features(transform(image).unsqueeze(0))
# features is a dict (stage name -> torch.Tensor)
print([(k, v.size()) for k, v in features.items()])
# Output example:
# [('stage1', torch.Size([1, 96, 96, 96])),
# ('stage2', torch.Size([1, 192, 48, 48])),
# ('stage3', torch.Size([1, 384, 24, 24])),
# ('stage4', torch.Size([1, 768, 12, 12]))]
```
## Citation
```bibtex
@misc{woo2023convnextv2codesigningscaling,
title={ConvNeXt V2: Co-designing and Scaling ConvNets with Masked Autoencoders},
author={Sanghyun Woo and Shoubhik Debnath and Ronghang Hu and Xinlei Chen and Zhuang Liu and In So Kweon and Saining Xie},
year={2023},
eprint={2301.00808},
archivePrefix={arXiv},
primaryClass={cs.CV},
url={https://arxiv.org/abs/2301.00808},
}
```
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