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ConViT

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ConViT

Category: ViT · Code: timm/models/convit.py · Architectures: 3 · Pretrained weights: 3 (3 with ImageNet-1k results)

ConViT replaces the self-attention of the early Vision Transformer blocks with gated positional self-attention (GPSA), which can be initialized to behave like a convolution, as a soft convolutional inductive bias.

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('convit_small.fb_in1k', pretrained=True)
>>> data_config = timm.data.resolve_model_data_config(model)

Model API support

FeatureConVit
features_only=True feature maps✓ (strides 16, 16, 16)
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 (ConVit with convit_tiny 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
convit_base86.5417.522241
convit_small27.785.762241
convit_tiny5.711.262241

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
convit_base.fb_in1k22482.2962241000apache-2.0timm
convit_small.fb_in1k22481.4122241000apache-2.0timm
convit_tiny.fb_in1k22473.1402241000apache-2.0timm

Citation

@article{d2021convit,
  title={ConViT: Improving Vision Transformers with Soft Convolutional Inductive Biases},
  author={d'Ascoli, St{'e}phane and Touvron, Hugo and Leavitt, Matthew and Morcos, Ari and Biroli, Giulio and Sagun, Levent},
  journal={arXiv preprint arXiv:2103.10697},
  year={2021}
}
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