timm documentation

SENet (legacy)

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SENet (legacy)

Category: CNN · Code: timm/models/senet.py · Architectures: 9 · Pretrained weights: 9 (9 with ImageNet-1k results)

SENet, SE-ResNet and SE-ResNeXt from Cadene’s pretrained models (legacy_*). The module is deprecated in favour of the SE variants of the ResNet class.

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('legacy_seresnext50_32x4d.in1k', pretrained=True)
>>> data_config = timm.data.resolve_model_data_config(model)

Model API support

FeatureSENet
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 (SENet with legacy_seresnet18 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
legacy_senet154115.0920.772241
legacy_seresnet1811.781.822241
legacy_seresnet3421.963.672241
legacy_seresnet5028.093.882241
legacy_seresnet10149.337.612241
legacy_seresnet15266.8211.332241
legacy_seresnext26_32x4d16.792.492241
legacy_seresnext50_32x4d27.564.262241
legacy_seresnext101_32x4d48.968.022241

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
legacy_senet154.in1k22481.3202241000apache-2.0original
legacy_seresnet18.in1k22471.7422241000apache-2.0original
legacy_seresnet34.in1k22474.7882241000apache-2.0original
legacy_seresnet50.in1k22477.6502241000apache-2.0original
legacy_seresnet101.in1k22478.3702241000apache-2.0original
legacy_seresnet152.in1k22478.6622241000apache-2.0original
legacy_seresnext26_32x4d.in1k22477.1002241000apache-2.0original
legacy_seresnext50_32x4d.in1k22479.0802241000apache-2.0original
legacy_seresnext101_32x4d.in1k22480.2742241000apache-2.0original
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