set_input_size() method to EVA models, used by OpenCLIP 3.0.0 to allow resizing for timm based encoder models.eva.py) including EVA, EVA02, Meta PE ViT, timm SBB ViT w/ ROPE, and Naver ROPE-ViT can be now loaded in NaFlexViT when use_naflex=True passed at model creation timeeva.py, add RotaryEmbeddingMixed module for mixed mode, weights on HuggingFace Hubforward_intermediates and fix some checkpointing bugs. Thanks https://github.com/brianhou0208vision_transformer.py can be loaded into the NaFlexVit model by adding the use_naflex=True flag to create_model
train.py and validate.py add the --naflex-loader arg, must be used with a NaFlexVitpython validate.py /imagenet --amp -j 8 --model vit_base_patch16_224 --model-kwargs use_naflex=True --naflex-loader --naflex-max-seq-len 256--naflex-train-seq-lens' argument specifies which sequence lengths to randomly pick from per batch during training--naflex-max-seq-len argument sets the target sequence length for validation--model-kwargs enable_patch_interpolator=True --naflex-patch-sizes 12 16 24 will enable random patch size selection per-batch w/ interpolation--naflex-loss-scale arg changes loss scaling mode per batch relative to the batch size, timm NaFlex loading changes the batch size for each seq lentimm weights
forward_intermediates() and some additional fixes thanks to https://github.com/brianhou0208
forward_intermediates() thanks to https://github.com/brianhou0208local-dir: pretrained schema, can use local-dir:/path/to/model/folder for model name to source model / pretrained cfg & weights Hugging Face Hub models (config.json + weights file) from a local folder.vit_so150m2_patch16_reg1_gap_448.sbb_e200_in12k_ft_in1k - 88.1% top-1vit_so150m2_patch16_reg1_gap_384.sbb_e200_in12k_ft_in1k - 87.9% top-1vit_so150m2_patch16_reg1_gap_256.sbb_e200_in12k_ft_in1k - 87.3% top-1vit_so150m2_patch16_reg4_gap_256.sbb_e200_in12ktimmvit_so150m_patch16_reg4_gap_256.sbb_e250_in12k_ft_in1k - 86.7% top-1vit_so150m_patch16_reg4_gap_384.sbb_e250_in12k_ft_in1k - 87.4% top-1vit_so150m_patch16_reg4_gap_256.sbb_e250_in12kbfloat16 or float16wandb project name arg added by https://github.com/caojiaolong, use arg.experiment for nametorch.utils.checkpoint.checkpoint() wrapper in timm.models that defaults use_reentrant=False, unless TIMM_REENTRANT_CKPT=1 is set in env.convnext_nano 384x384 ImageNet-12k pretrain & fine-tune. https://huggingface.co/models?search=convnext_nano%20r384vit_large_patch14_clip_224.dfn2b_s39bRmsNorm layer & fn to match standard formulation, use PT 2.5 impl when possible. Move old impl to SimpleNorm layer, it's LN w/o centering or bias. There were only two timm models using it, and they have been updated.cache_dir arg for model creationtrust_remote_code for HF datasets wrapperinception_next_atto model added by creatorhf-hub: based loading, and thus will work with new Transformers TimmWrapperModellist_optimizers, get_optimizer_class, get_optimizer_info to reworked create_optimizer_v2 fn to explore optimizers, get info or classoptim.optim_factory, move fns to optim/_optim_factory.py and optim/_param_groups.py and encourage import via timm.optimAdd a set of new very well trained ResNet & ResNet-V2 18/34 (basic block) weights. See https://huggingface.co/blog/rwightman/resnet-trick-or-treat
timm.models.registry, increased priority of existing deprecation warnings to be visibletimm as vit_intern300m_patch14_448mobilenet_edgetpu_v2_m weights w/ ra4 mnv4-small based recipe. 80.1% top-1 @ 224 and 80.7 @ 256.set_input_size() added to vit and swin v1/v2 models to allow changing image size, patch size, window size after model creation.set_input_size, always_partition and strict_img_size args have been added to __init__ to allow more flexible input size constraintstiny < .5M param models for testing that are actually trained on ImageNet-1ktimm trained weights added:normalize= flag for transforms, return non-normalized torch.Tensor with original dtype (for chug)Searching for Better ViT Baselines (For the GPU Poor) weights and vit variants released. Exploring model shapes between Tiny and Base.timm models. See example in #1232 (comment)forward_intermediates() API refined and added to more models including some ConvNets that have other extraction methods.features_only=True feature extraction. Remaining 34 architectures can be supported but based on priority requests.features_only=True support for ViT models with flat hidden states or non-std module layouts (so far covering 'vit_*', 'twins_*', 'deit*', 'beit*', 'mvitv2*', 'eva*', 'samvit_*', 'flexivit*')forward_intermediates() API that can be used with a feature wrapping module or directly.model = timm.create_model('vit_base_patch16_224')
final_feat, intermediates = model.forward_intermediates(input)
output = model.forward_head(final_feat) # pooling + classifier head
print(final_feat.shape)
torch.Size([2, 197, 768])
for f in intermediates:
print(f.shape)
torch.Size([2, 768, 14, 14])
torch.Size([2, 768, 14, 14])
torch.Size([2, 768, 14, 14])
torch.Size([2, 768, 14, 14])
torch.Size([2, 768, 14, 14])
torch.Size([2, 768, 14, 14])
torch.Size([2, 768, 14, 14])
torch.Size([2, 768, 14, 14])
torch.Size([2, 768, 14, 14])
torch.Size([2, 768, 14, 14])
torch.Size([2, 768, 14, 14])
torch.Size([2, 768, 14, 14])
print(output.shape)
torch.Size([2, 1000])
model = timm.create_model('eva02_base_patch16_clip_224', pretrained=True, img_size=512, features_only=True, out_indices=(-3, -2,))
output = model(torch.randn(2, 3, 512, 512))
for o in output:
print(o.shape)
torch.Size([2, 768, 32, 32])
torch.Size([2, 768, 32, 32])
PyTorch Image Models (timm) is a collection of image models, layers, utilities, optimizers, schedulers, data-loaders / augmentations, and reference training / validation scripts that aim to pull together a wide variety of SOTA models with ability to reproduce ImageNet training results.
The work of many others is present here. I've tried to make sure all source material is acknowledged via links to github, arxiv papers, etc in the README, documentation, and code docstrings. Please let me know if I missed anything.
All model architecture families include variants with pretrained weights. There are specific model variants without any weights, it is NOT a bug. Help training new or better weights is always appreciated.
To see full list of optimizers w/ descriptions: timm.optim.list_optimizers(with_description=True)
Included optimizers available via timm.optim.create_optimizer_v2 factory method:
adabelief an implementation of AdaBelief adapted from https://github.com/juntang-zhuang/Adabelief-Optimizer - https://arxiv.org/abs/2010.07468adafactor adapted from FAIRSeq impl - https://arxiv.org/abs/1804.04235adafactorbv adapted from Big Vision - https://arxiv.org/abs/2106.04560adahessian by David Samuel - https://arxiv.org/abs/2006.00719adamp and sgdp by Naver ClovAI - https://arxiv.org/abs/2006.08217adan an implementation of Adan adapted from https://github.com/sail-sg/Adan - https://arxiv.org/abs/2208.06677adopt ADOPT adapted from https://github.com/iShohei220/adopt - https://arxiv.org/abs/2411.02853kron PSGD w/ Kronecker-factored preconditioner from https://github.com/evanatyourservice/kron_torch - https://sites.google.com/site/lixilinx/home/psgdlamb an implementation of Lamb and LambC (w/ trust-clipping) cleaned up and modified to support use with XLA - https://arxiv.org/abs/1904.00962laprop optimizer from https://github.com/Z-T-WANG/LaProp-Optimizer - https://arxiv.org/abs/2002.04839lars an implementation of LARS and LARC (w/ trust-clipping) - https://arxiv.org/abs/1708.03888lion and implementation of Lion adapted from https://github.com/google/automl/tree/master/lion - https://arxiv.org/abs/2302.06675lookahead adapted from impl by Liam - https://arxiv.org/abs/1907.08610madgrad an implementation of MADGRAD adapted from https://github.com/facebookresearch/madgrad - https://arxiv.org/abs/2101.11075mars MARS optimizer from https://github.com/AGI-Arena/MARS - https://arxiv.org/abs/2411.10438nadam an implementation of Adam w/ Nesterov momentumnadamw an implementation of AdamW (Adam w/ decoupled weight-decay) w/ Nesterov momentum. A simplified impl based on https://github.com/mlcommons/algorithmic-efficiencynovograd by Masashi Kimura - https://arxiv.org/abs/1905.11286radam by Liyuan Liu - https://arxiv.org/abs/1908.03265rmsprop_tf adapted from PyTorch RMSProp by myself. Reproduces much improved Tensorflow RMSProp behavioursgdw and implementation of SGD w/ decoupled weight-decayfused<name> optimizers by name with NVIDIA Apex installedbnb<name> optimizers by name with BitsAndBytes installedcadamw, clion, and more 'Cautious' optimizers from https://github.com/kyleliang919/C-Optim - https://arxiv.org/abs/2411.16085adam, adamw, rmsprop, adadelta, adagrad, and sgd pass through to torch.optim implementationsc suffix (eg adamc, nadamc to implement 'corrected weight decay' in https://arxiv.org/abs/2506.02285)Several (less common) features that I often utilize in my projects are included. Many of their additions are the reason why I maintain my own set of models, instead of using others' via PIP:
get_classifier and reset_classifierforward_features (see documentation)create_model(name, features_only=True, out_indices=..., output_stride=...)out_indices creation arg specifies which feature maps to return, these indices are 0 based and generally correspond to the C(i + 1) feature level.output_stride creation arg controls output stride of the network by using dilated convolutions. Most networks are stride 32 by default. Not all networks support this..feature_info memberstep, cosine w/ restarts, tanh w/ restarts, plateauModel validation results can be found in the results tables
Getting Started (Documentation)The official documentation can be found at https://huggingface.co/docs/hub/timm. Documentation contributions are welcome.
Getting Started with PyTorch Image Models (timm): A Practitioner’s Guide by Chris Hughes is an extensive blog post covering many aspects of timm in detail.
timmdocs is an alternate set of documentation for timm. A big thanks to Aman Arora for his efforts creating timmdocs.
paperswithcode is a good resource for browsing the models within timm.
The root folder of the repository contains reference train, validation, and inference scripts that work with the included models and other features of this repository. They are adaptable for other datasets and use cases with a little hacking. See documentation.
Awesome PyTorch ResourcesOne of the greatest assets of PyTorch is the community and their contributions. A few of my favourite resources that pair well with the models and components here are listed below.
Object Detection, Instance and Semantic SegmentationThe code here is licensed Apache 2.0. I've taken care to make sure any third party code included or adapted has compatible (permissive) licenses such as MIT, BSD, etc. I've made an effort to avoid any GPL / LGPL conflicts. That said, it is your responsibility to ensure you comply with licenses here and conditions of any dependent licenses. Where applicable, I've linked the sources/references for various components in docstrings. If you think I've missed anything please create an issue.
So far all of the pretrained weights available here are pretrained on ImageNet with a select few that have some additional pretraining (see extra note below). ImageNet was released for non-commercial research purposes only (https://image-net.org/download). It's not clear what the implications of that are for the use of pretrained weights from that dataset. Any models I have trained with ImageNet are done for research purposes and one should assume that the original dataset license applies to the weights. It's best to seek legal advice if you intend to use the pretrained weights in a commercial product.
Pretrained on more than ImageNetSeveral weights included or references here were pretrained with proprietary datasets that I do not have access to. These include the Facebook WSL, SSL, SWSL ResNe(Xt) and the Google Noisy Student EfficientNet models. The Facebook models have an explicit non-commercial license (CC-BY-NC 4.0, https://github.com/facebookresearch/semi-supervised-ImageNet1K-models, https://github.com/facebookresearch/WSL-Images). The Google models do not appear to have any restriction beyond the Apache 2.0 license (and ImageNet concerns). In either case, you should contact Facebook or Google with any questions.
@misc{rw2019timm,
author = {Ross Wightman},
title = {PyTorch Image Models},
year = {2019},
publisher = {GitHub},
journal = {GitHub repository},
doi = {10.5281/zenodo.4414861},
howpublished = {\url{https://github.com/rwightman/pytorch-image-models}}
}
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