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ResNeSt

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ResNeSt

Category: CNN · Code: timm/models/resnest.py · Architectures: 8 · Pretrained weights: 8 (8 with ImageNet-1k results)

ResNeSt uses split-attention blocks, channel attention across groups of feature map splits, in a ResNet style network.

Papers

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('resnest50d_1s4x24d.in1k', pretrained=True)
>>> data_config = timm.data.resolve_model_data_config(model)

Model API support

FeatureResNet
features_only=True feature maps✓ (strides 2, 4, 8, 16, 32)
forward_intermediates()✓
prune_intermediate_layers()✓
Any input size, no changes needed✓
set_input_size()–
dynamic_img_size=True–
set_grad_checkpointing()✓
Layer-wise LR decay (group_matcher())✓
reset_classifier()✓

✓ 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 (ResNet with resnest14d at 224), other architectures of the same class are expected to behave the same. See the Model API page for details.

Architectures

ArchitectureParams (M)GMACsInput sizePretrained weights
resnest14d10.612.762241
resnest26d17.073.642241
resnest50d27.485.402241
resnest50d_1s4x24d25.684.432241
resnest50d_4s2x40d30.424.402241
resnest101e48.2813.382561
resnest200e70.2035.693201
resnest269e110.9377.694161

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.

WeightInput sizeTop-1 (%)Eval sizeClassesLicenseHub
resnest14d.gluon_in1k22475.5162241000apache-2.0timm
resnest26d.gluon_in1k22478.4762241000apache-2.0timm
resnest50d.in1k22480.9582241000apache-2.0timm
resnest50d_1s4x24d.in1k22481.0242241000apache-2.0timm
resnest50d_4s2x40d.in1k22481.1462241000apache-2.0timm
resnest101e.in1k25682.9162561000apache-2.0timm
resnest200e.in1k32083.8803201000apache-2.0timm
resnest269e.in1k41684.5424161000apache-2.0timm
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