NFNet

Category: CNN · Code: timm/models/nfnet.py · Architectures: 36 · Pretrained weights: 14 (14 with ImageNet-1k results)

Normalization-Free networks, trained without batch normalization using scaled weight standardization: NFNet (with adaptive gradient clipping), NF-RegNet and pre-activation NF-ResNet models.

Papers

• Characterizing signal propagation to close the performance gap in unnormalized ResNets
• High-Performance Large-Scale Image Recognition Without Normalization

Usage

See the Quickstart for loading pretrained weights, image preprocessing and fine-tuning, and Feature Extraction for using the models as backbones.

>>> import timm
>>> model = timm.create_model('nf_resnet50.ra2_in1k', pretrained=True)
>>> data_config = timm.data.resolve_model_data_config(model)

Model API support

✓ supported, ✓ (square) works for square sizes only, ✗ not supported, – not needed (the model already accepts any input size). Checked by running each feature on a randomly initialized model (NormFreeNet with nf_regnet_b0 at 192), other architectures of the same class are expected to behave the same. See the Model API page for details.

Architectures

GMACs and parameter counts are for the default input size and classifier of each architecture, from the benchmark results.

Pretrained weights

Top-1 is ImageNet-1k validation accuracy from results-imagenet.csv at the listed eval size, - if the weight has no ImageNet-1k result (e.g. pretraining or image-text weights). Classes is the size of the pretrained classifier, none for weights without one.

Weights are grouped by source: the paper or origin given in the pretrained config, else a Hub organization other than timm, else the first part of the pretrained tag (architecture.tag). Sources with a single weight are listed under other.

dm tags

ra2 tags

Other