PyTorch Image Models
Thanks to the following for hardware support:
And a big thanks to all GitHub sponsors who helped with some of my costs before I joined Hugging Face.
What's New
- ❗Updates after Oct 10, 2022 are available in 0.8.x pre-releases (
pip install --pre timm
) or cloning main❗
- Stable releases are 0.6.x and available by normal pip install or clone from 0.6.x branch.
Feb 26, 2023
- Add ConvNeXt-XXLarge CLIP pretrained image tower weights for fine-tune & features (fine-tuning TBD) -- see model card
- Update
convnext_xxlarge
default LayerNorm eps to 1e-5 (for CLIP weights, improved stability)
- 0.8.15dev0
Feb 20, 2023
- Add 320x320
convnext_large_mlp.clip_laion2b_ft_320
and convnext_lage_mlp.clip_laion2b_ft_soup_320
CLIP image tower weights for features & fine-tune
- 0.8.13dev0 pypi release for latest changes w/ move to huggingface org
Feb 16, 2023
safetensor
checkpoint support added
- Add ideas from 'Scaling Vision Transformers to 22 B. Params' (https://arxiv.org/abs/2302.05442) -- qk norm, RmsNorm, parallel block
- Add F.scaled_dot_product_attention support (PyTorch 2.0 only) to
vit_*
, vit_relpos*
, coatnet
/ maxxvit
(to start)
- Lion optimizer (w/ multi-tensor option) added (https://arxiv.org/abs/2302.06675)
- gradient checkpointing works with
features_only=True
Feb 7, 2023
- New inference benchmark numbers added in results folder.
- Add convnext LAION CLIP trained weights and initial set of in1k fine-tunes
convnext_base.clip_laion2b_augreg_ft_in1k
- 86.2% @ 256x256
convnext_base.clip_laiona_augreg_ft_in1k_384
- 86.5% @ 384x384
convnext_large_mlp.clip_laion2b_augreg_ft_in1k
- 87.3% @ 256x256
convnext_large_mlp.clip_laion2b_augreg_ft_in1k_384
- 87.9% @ 384x384
- Add DaViT models. Supports
features_only=True
. Adapted from https://github.com/dingmyu/davit by Fredo.
- Use a common NormMlpClassifierHead across MaxViT, ConvNeXt, DaViT
- Add EfficientFormer-V2 model, update EfficientFormer, and refactor LeViT (closely related architectures). Weights on HF hub.
- New EfficientFormer-V2 arch, significant refactor from original at (https://github.com/snap-research/EfficientFormer). Supports
features_only=True
.
- Minor updates to EfficientFormer.
- Refactor LeViT models to stages, add
features_only=True
support to new conv
variants, weight remap required.
- Move ImageNet meta-data (synsets, indices) from
/results
to timm/data/_info
.
- Add ImageNetInfo / DatasetInfo classes to provide labelling for various ImageNet classifier layouts in
timm
- Update
inference.py
to use, try: python inference.py /folder/to/images --model convnext_small.in12k --label-type detail --topk 5
- Ready for 0.8.10 pypi pre-release (final testing).
Jan 20, 2023
-
Add two convnext 12k -> 1k fine-tunes at 384x384
convnext_tiny.in12k_ft_in1k_384
- 85.1 @ 384
convnext_small.in12k_ft_in1k_384
- 86.2 @ 384
-
Push all MaxxViT weights to HF hub, and add new ImageNet-12k -> 1k fine-tunes for rw
base MaxViT and CoAtNet 1/2 models
Jan 11, 2023
- Update ConvNeXt ImageNet-12k pretrain series w/ two new fine-tuned weights (and pre FT
.in12k
tags)
convnext_nano.in12k_ft_in1k
- 82.3 @ 224, 82.9 @ 288 (previously released)
convnext_tiny.in12k_ft_in1k
- 84.2 @ 224, 84.5 @ 288
convnext_small.in12k_ft_in1k
- 85.2 @ 224, 85.3 @ 288
Jan 6, 2023
- Finally got around to adding
--model-kwargs
and --opt-kwargs
to scripts to pass through rare args directly to model classes from cmd line
train.py /imagenet --model resnet50 --amp --model-kwargs output_stride=16 act_layer=silu
train.py /imagenet --model vit_base_patch16_clip_224 --img-size 240 --amp --model-kwargs img_size=240 patch_size=12
- Cleanup some popular models to better support arg passthrough / merge with model configs, more to go.
Jan 5, 2023
- ConvNeXt-V2 models and weights added to existing
convnext.py
Dec 23, 2022 🎄☃
- Add FlexiViT models and weights from https://github.com/google-research/big_vision (check out paper at https://arxiv.org/abs/2212.08013)
- NOTE currently resizing is static on model creation, on-the-fly dynamic / train patch size sampling is a WIP
- Many more models updated to multi-weight and downloadable via HF hub now (convnext, efficientnet, mobilenet, vision_transformer*, beit)
- More model pretrained tag and adjustments, some model names changed (working on deprecation translations, consider main branch DEV branch right now, use 0.6.x for stable use)
- More ImageNet-12k (subset of 22k) pretrain models popping up:
efficientnet_b5.in12k_ft_in1k
- 85.9 @ 448x448
vit_medium_patch16_gap_384.in12k_ft_in1k
- 85.5 @ 384x384
vit_medium_patch16_gap_256.in12k_ft_in1k
- 84.5 @ 256x256
convnext_nano.in12k_ft_in1k
- 82.9 @ 288x288
Dec 8, 2022
- Add 'EVA l' to
vision_transformer.py
, MAE style ViT-L/14 MIM pretrain w/ EVA-CLIP targets, FT on ImageNet-1k (w/ ImageNet-22k intermediate for some)
model |
top1 |
param_count |
gmac |
macts |
hub |
eva_large_patch14_336.in22k_ft_in22k_in1k |
89.2 |
304.5 |
191.1 |
270.2 |
link |
eva_large_patch14_336.in22k_ft_in1k |
88.7 |
304.5 |
191.1 |
270.2 |
link |
eva_large_patch14_196.in22k_ft_in22k_in1k |
88.6 |
304.1 |
61.6 |
63.5 |
link |
eva_large_patch14_196.in22k_ft_in1k |
87.9 |
304.1 |
61.6 |
63.5 |
link |
Dec 6, 2022
- Add 'EVA g', BEiT style ViT-g/14 model weights w/ both MIM pretrain and CLIP pretrain to
beit.py
.
model |
top1 |
param_count |
gmac |
macts |
hub |
eva_giant_patch14_560.m30m_ft_in22k_in1k |
89.8 |
1014.4 |
1906.8 |
2577.2 |
link |
eva_giant_patch14_336.m30m_ft_in22k_in1k |
89.6 |
1013 |
620.6 |
550.7 |
link |
eva_giant_patch14_336.clip_ft_in1k |
89.4 |
1013 |
620.6 |
550.7 |
link |
eva_giant_patch14_224.clip_ft_in1k |
89.1 |
1012.6 |
267.2 |
192.6 |
link |
Dec 5, 2022
- Pre-release (
0.8.0dev0
) of multi-weight support (model_arch.pretrained_tag
). Install with pip install --pre timm
- vision_transformer, maxvit, convnext are the first three model impl w/ support
- model names are changing with this (previous _21k, etc. fn will merge), still sorting out deprecation handling
- bugs are likely, but I need feedback so please try it out
- if stability is needed, please use 0.6.x pypi releases or clone from 0.6.x branch
- Support for PyTorch 2.0 compile is added in train/validate/inference/benchmark, use
--torchcompile
argument
- Inference script allows more control over output, select k for top-class index + prob json, csv or parquet output
- Add a full set of fine-tuned CLIP image tower weights from both LAION-2B and original OpenAI CLIP models
model |
top1 |
param_count |
gmac |
macts |
hub |
vit_huge_patch14_clip_336.laion2b_ft_in12k_in1k |
88.6 |
632.5 |
391 |
407.5 |
link |
vit_large_patch14_clip_336.openai_ft_in12k_in1k |
88.3 |
304.5 |
191.1 |
270.2 |
link |
vit_huge_patch14_clip_224.laion2b_ft_in12k_in1k |
88.2 |
632 |
167.4 |
139.4 |
link |
vit_large_patch14_clip_336.laion2b_ft_in12k_in1k |
88.2 |
304.5 |
191.1 |
270.2 |
link |
vit_large_patch14_clip_224.openai_ft_in12k_in1k |
88.2 |
304.2 |
81.1 |
88.8 |
link |
vit_large_patch14_clip_224.laion2b_ft_in12k_in1k |
87.9 |
304.2 |
81.1 |
88.8 |
link |
vit_large_patch14_clip_224.openai_ft_in1k |
87.9 |
304.2 |
81.1 |
88.8 |
link |
vit_large_patch14_clip_336.laion2b_ft_in1k |
87.9 |
304.5 |
191.1 |
270.2 |
link |
vit_huge_patch14_clip_224.laion2b_ft_in1k |
87.6 |
632 |
167.4 |
139.4 |
link |
vit_large_patch14_clip_224.laion2b_ft_in1k |
87.3 |
304.2 |
81.1 |
88.8 |
link |
vit_base_patch16_clip_384.laion2b_ft_in12k_in1k |
87.2 |
86.9 |
55.5 |
101.6 |
link |
vit_base_patch16_clip_384.openai_ft_in12k_in1k |
87 |
86.9 |
55.5 |
101.6 |
link |
vit_base_patch16_clip_384.laion2b_ft_in1k |
86.6 |
86.9 |
55.5 |
101.6 |
link |
vit_base_patch16_clip_384.openai_ft_in1k |
86.2 |
86.9 |
55.5 |
101.6 |
link |
vit_base_patch16_clip_224.laion2b_ft_in12k_in1k |
86.2 |
86.6 |
17.6 |
23.9 |
link |
vit_base_patch16_clip_224.openai_ft_in12k_in1k |
85.9 |
86.6 |
17.6 |
23.9 |
link |
vit_base_patch32_clip_448.laion2b_ft_in12k_in1k |
85.8 |
88.3 |
17.9 |
23.9 |
link |
vit_base_patch16_clip_224.laion2b_ft_in1k |
85.5 |
86.6 |
17.6 |
23.9 |
link |
vit_base_patch32_clip_384.laion2b_ft_in12k_in1k |
85.4 |
88.3 |
13.1 |
16.5 |
link |
vit_base_patch16_clip_224.openai_ft_in1k |
85.3 |
86.6 |
17.6 |
23.9 |
link |
vit_base_patch32_clip_384.openai_ft_in12k_in1k |
85.2 |
88.3 |
13.1 |
16.5 |
link |
vit_base_patch32_clip_224.laion2b_ft_in12k_in1k |
83.3 |
88.2 |
4.4 |
5 |
link |
vit_base_patch32_clip_224.laion2b_ft_in1k |
82.6 |
88.2 |
4.4 |
5 |
link |
vit_base_patch32_clip_224.openai_ft_in1k |
81.9 |
88.2 |
4.4 |
5 |
link |
- Port of MaxViT Tensorflow Weights from official impl at https://github.com/google-research/maxvit
- There was larger than expected drops for the upscaled 384/512 in21k fine-tune weights, possible detail missing, but the 21k FT did seem sensitive to small preprocessing
model |
top1 |
param_count |
gmac |
macts |
hub |
maxvit_xlarge_tf_512.in21k_ft_in1k |
88.5 |
475.8 |
534.1 |
1413.2 |
link |
maxvit_xlarge_tf_384.in21k_ft_in1k |
88.3 |
475.3 |
292.8 |
668.8 |
link |
maxvit_base_tf_512.in21k_ft_in1k |
88.2 |
119.9 |
138 |
704 |
link |
maxvit_large_tf_512.in21k_ft_in1k |
88 |
212.3 |
244.8 |
942.2 |
link |
maxvit_large_tf_384.in21k_ft_in1k |
88 |
212 |
132.6 |
445.8 |
link |
maxvit_base_tf_384.in21k_ft_in1k |
87.9 |
119.6 |
73.8 |
332.9 |
link |
maxvit_base_tf_512.in1k |
86.6 |
119.9 |
138 |
704 |
link |
maxvit_large_tf_512.in1k |
86.5 |
212.3 |
244.8 |
942.2 |
link |
maxvit_base_tf_384.in1k |
86.3 |
119.6 |
73.8 |
332.9 |
link |
maxvit_large_tf_384.in1k |
86.2 |
212 |
132.6 |
445.8 |
link |
maxvit_small_tf_512.in1k |
86.1 |
69.1 |
67.3 |
383.8 |
link |
maxvit_tiny_tf_512.in1k |
85.7 |
31 |
33.5 |
257.6 |
link |
maxvit_small_tf_384.in1k |
85.5 |
69 |
35.9 |
183.6 |
link |
maxvit_tiny_tf_384.in1k |
85.1 |
31 |
17.5 |
123.4 |
link |
maxvit_large_tf_224.in1k |
84.9 |
211.8 |
43.7 |
127.4 |
link |
maxvit_base_tf_224.in1k |
84.9 |
119.5 |
24 |
95 |
link |
maxvit_small_tf_224.in1k |
84.4 |
68.9 |
11.7 |
53.2 |
link |
maxvit_tiny_tf_224.in1k |
83.4 |
30.9 |
5.6 |
35.8 |
link |
Oct 15, 2022
- Train and validation script enhancements
- Non-GPU (ie CPU) device support
- SLURM compatibility for train script
- HF datasets support (via ReaderHfds)
- TFDS/WDS dataloading improvements (sample padding/wrap for distributed use fixed wrt sample count estimate)
- in_chans !=3 support for scripts / loader
- Adan optimizer
- Can enable per-step LR scheduling via args
- Dataset 'parsers' renamed to 'readers', more descriptive of purpose
- AMP args changed, APEX via
--amp-impl apex
, bfloat16 supportedf via --amp-dtype bfloat16
- main branch switched to 0.7.x version, 0.6x forked for stable release of weight only adds
- master -> main branch rename
Oct 10, 2022
- More weights in
maxxvit
series, incl first ConvNeXt block based coatnext
and maxxvit
experiments:
coatnext_nano_rw_224
- 82.0 @ 224 (G) -- (uses ConvNeXt conv block, no BatchNorm)
maxxvit_rmlp_nano_rw_256
- 83.0 @ 256, 83.7 @ 320 (G) (uses ConvNeXt conv block, no BN)
maxvit_rmlp_small_rw_224
- 84.5 @ 224, 85.1 @ 320 (G)
maxxvit_rmlp_small_rw_256
- 84.6 @ 256, 84.9 @ 288 (G) -- could be trained better, hparams need tuning (uses ConvNeXt block, no BN)
coatnet_rmlp_2_rw_224
- 84.6 @ 224, 85 @ 320 (T)
- NOTE: official MaxVit weights (in1k) have been released at https://github.com/google-research/maxvit -- some extra work is needed to port and adapt since my impl was created independently of theirs and has a few small differences + the whole TF same padding fun.
Sept 23, 2022
- LAION-2B CLIP image towers supported as pretrained backbones for fine-tune or features (no classifier)
- vit_base_patch32_224_clip_laion2b
- vit_large_patch14_224_clip_laion2b
- vit_huge_patch14_224_clip_laion2b
- vit_giant_patch14_224_clip_laion2b
Sept 7, 2022
- Hugging Face
timm
docs home now exists, look for more here in the future
- Add BEiT-v2 weights for base and large 224x224 models from https://github.com/microsoft/unilm/tree/master/beit2
- Add more weights in
maxxvit
series incl a pico
(7.5M params, 1.9 GMACs), two tiny
variants:
maxvit_rmlp_pico_rw_256
- 80.5 @ 256, 81.3 @ 320 (T)
maxvit_tiny_rw_224
- 83.5 @ 224 (G)
maxvit_rmlp_tiny_rw_256
- 84.2 @ 256, 84.8 @ 320 (T)
Aug 29, 2022
- MaxVit window size scales with img_size by default. Add new RelPosMlp MaxViT weight that leverages this:
maxvit_rmlp_nano_rw_256
- 83.0 @ 256, 83.6 @ 320 (T)
Aug 26, 2022
Aug 15, 2022
- ConvNeXt atto weights added
convnext_atto
- 75.7 @ 224, 77.0 @ 288
convnext_atto_ols
- 75.9 @ 224, 77.2 @ 288
Aug 5, 2022
- More custom ConvNeXt smaller model defs with weights
convnext_femto
- 77.5 @ 224, 78.7 @ 288
convnext_femto_ols
- 77.9 @ 224, 78.9 @ 288
convnext_pico
- 79.5 @ 224, 80.4 @ 288
convnext_pico_ols
- 79.5 @ 224, 80.5 @ 288
convnext_nano_ols
- 80.9 @ 224, 81.6 @ 288
- Updated EdgeNeXt to improve ONNX export, add new base variant and weights from original (https://github.com/mmaaz60/EdgeNeXt)
July 28, 2022
- Add freshly minted DeiT-III Medium (width=512, depth=12, num_heads=8) model weights. Thanks Hugo Touvron!
July 27, 2022
- All runtime benchmark and validation result csv files are finally up-to-date!
- A few more weights & model defs added:
darknetaa53
- 79.8 @ 256, 80.5 @ 288
convnext_nano
- 80.8 @ 224, 81.5 @ 288
cs3sedarknet_l
- 81.2 @ 256, 81.8 @ 288
cs3darknet_x
- 81.8 @ 256, 82.2 @ 288
cs3sedarknet_x
- 82.2 @ 256, 82.7 @ 288
cs3edgenet_x
- 82.2 @ 256, 82.7 @ 288
cs3se_edgenet_x
- 82.8 @ 256, 83.5 @ 320
cs3*
weights above all trained on TPU w/ bits_and_tpu
branch. Thanks to TRC program!
- Add output_stride=8 and 16 support to ConvNeXt (dilation)
- deit3 models not being able to resize pos_emb fixed
- Version 0.6.7 PyPi release (/w above bug fixes and new weighs since 0.6.5)
July 8, 2022
More models, more fixes
- Official research models (w/ weights) added:
- My own models:
- Small
ResNet
defs added by request with 1 block repeats for both basic and bottleneck (resnet10 and resnet14)
CspNet
refactored with dataclass config, simplified CrossStage3 (cs3
) option. These are closer to YOLO-v5+ backbone defs.
- More relative position vit fiddling. Two
srelpos
(shared relative position) models trained, and a medium w/ class token.
- Add an alternate downsample mode to EdgeNeXt and train a
small
model. Better than original small, but not their new USI trained weights.
- My own model weight results (all ImageNet-1k training)
resnet10t
- 66.5 @ 176, 68.3 @ 224
resnet14t
- 71.3 @ 176, 72.3 @ 224
resnetaa50
- 80.6 @ 224 , 81.6 @ 288
darknet53
- 80.0 @ 256, 80.5 @ 288
cs3darknet_m
- 77.0 @ 256, 77.6 @ 288
cs3darknet_focus_m
- 76.7 @ 256, 77.3 @ 288
cs3darknet_l
- 80.4 @ 256, 80.9 @ 288
cs3darknet_focus_l
- 80.3 @ 256, 80.9 @ 288
vit_srelpos_small_patch16_224
- 81.1 @ 224, 82.1 @ 320
vit_srelpos_medium_patch16_224
- 82.3 @ 224, 83.1 @ 320
vit_relpos_small_patch16_cls_224
- 82.6 @ 224, 83.6 @ 320
edgnext_small_rw
- 79.6 @ 224, 80.4 @ 320
cs3
, darknet
, and vit_*relpos
weights above all trained on TPU thanks to TRC program! Rest trained on overheating GPUs.
- Hugging Face Hub support fixes verified, demo notebook TBA
- Pretrained weights / configs can be loaded externally (ie from local disk) w/ support for head adaptation.
- Add support to change image extensions scanned by
timm
datasets/readers. See (https://github.com/rwightman/pytorch-image-models/pull/1274#issuecomment-1178303103)
- Default ConvNeXt LayerNorm impl to use
F.layer_norm(x.permute(0, 2, 3, 1), ...).permute(0, 3, 1, 2)
via LayerNorm2d
in all cases.
- a bit slower than previous custom impl on some hardware (ie Ampere w/ CL), but overall fewer regressions across wider HW / PyTorch version ranges.
- previous impl exists as
LayerNormExp2d
in models/layers/norm.py
- Numerous bug fixes
- Currently testing for imminent PyPi 0.6.x release
- LeViT pretraining of larger models still a WIP, they don't train well / easily without distillation. Time to add distill support (finally)?
- ImageNet-22k weight training + finetune ongoing, work on multi-weight support (slowly) chugging along (there are a LOT of weights, sigh) ...
May 13, 2022
- Official Swin-V2 models and weights added from (https://github.com/microsoft/Swin-Transformer). Cleaned up to support torchscript.
- Some refactoring for existing
timm
Swin-V2-CR impl, will likely do a bit more to bring parts closer to official and decide whether to merge some aspects.
- More Vision Transformer relative position / residual post-norm experiments (all trained on TPU thanks to TRC program)
vit_relpos_small_patch16_224
- 81.5 @ 224, 82.5 @ 320 -- rel pos, layer scale, no class token, avg pool
vit_relpos_medium_patch16_rpn_224
- 82.3 @ 224, 83.1 @ 320 -- rel pos + res-post-norm, no class token, avg pool
vit_relpos_medium_patch16_224
- 82.5 @ 224, 83.3 @ 320 -- rel pos, layer scale, no class token, avg pool
vit_relpos_base_patch16_gapcls_224
- 82.8 @ 224, 83.9 @ 320 -- rel pos, layer scale, class token, avg pool (by mistake)
- Bring 512 dim, 8-head 'medium' ViT model variant back to life (after using in a pre DeiT 'small' model for first ViT impl back in 2020)
- Add ViT relative position support for switching btw existing impl and some additions in official Swin-V2 impl for future trials
- Sequencer2D impl (https://arxiv.org/abs/2205.01972), added via PR from author (https://github.com/okojoalg)
May 2, 2022
- Vision Transformer experiments adding Relative Position (Swin-V2 log-coord) (
vision_transformer_relpos.py
) and Residual Post-Norm branches (from Swin-V2) (vision_transformer*.py
)
vit_relpos_base_patch32_plus_rpn_256
- 79.5 @ 256, 80.6 @ 320 -- rel pos + extended width + res-post-norm, no class token, avg pool
vit_relpos_base_patch16_224
- 82.5 @ 224, 83.6 @ 320 -- rel pos, layer scale, no class token, avg pool
vit_base_patch16_rpn_224
- 82.3 @ 224 -- rel pos + res-post-norm, no class token, avg pool
- Vision Transformer refactor to remove representation layer that was only used in initial vit and rarely used since with newer pretrain (ie
How to Train Your ViT
)
vit_*
models support removal of class token, use of global average pool, use of fc_norm (ala beit, mae).
April 22, 2022
timm
models are now officially supported in fast.ai! Just in time for the new Practical Deep Learning course. timmdocs
documentation link updated to timm.fast.ai.
- Two more model weights added in the TPU trained series. Some In22k pretrain still in progress.
seresnext101d_32x8d
- 83.69 @ 224, 84.35 @ 288
seresnextaa101d_32x8d
(anti-aliased w/ AvgPool2d) - 83.85 @ 224, 84.57 @ 288
March 23, 2022
- Add
ParallelBlock
and LayerScale
option to base vit models to support model configs in Three things everyone should know about ViT
convnext_tiny_hnf
(head norm first) weights trained with (close to) A2 recipe, 82.2% top-1, could do better with more epochs.
March 21, 2022
- Merge
norm_norm_norm
. IMPORTANT this update for a coming 0.6.x release will likely de-stabilize the master branch for a while. Branch 0.5.x
or a previous 0.5.x release can be used if stability is required.
- Significant weights update (all TPU trained) as described in this release
regnety_040
- 82.3 @ 224, 82.96 @ 288
regnety_064
- 83.0 @ 224, 83.65 @ 288
regnety_080
- 83.17 @ 224, 83.86 @ 288
regnetv_040
- 82.44 @ 224, 83.18 @ 288 (timm pre-act)
regnetv_064
- 83.1 @ 224, 83.71 @ 288 (timm pre-act)
regnetz_040
- 83.67 @ 256, 84.25 @ 320
regnetz_040h
- 83.77 @ 256, 84.5 @ 320 (w/ extra fc in head)
resnetv2_50d_gn
- 80.8 @ 224, 81.96 @ 288 (pre-act GroupNorm)
resnetv2_50d_evos
80.77 @ 224, 82.04 @ 288 (pre-act EvoNormS)
regnetz_c16_evos
- 81.9 @ 256, 82.64 @ 320 (EvoNormS)
regnetz_d8_evos
- 83.42 @ 256, 84.04 @ 320 (EvoNormS)
xception41p
- 82 @ 299 (timm pre-act)
xception65
- 83.17 @ 299
xception65p
- 83.14 @ 299 (timm pre-act)
resnext101_64x4d
- 82.46 @ 224, 83.16 @ 288
seresnext101_32x8d
- 83.57 @ 224, 84.270 @ 288
resnetrs200
- 83.85 @ 256, 84.44 @ 320
- HuggingFace hub support fixed w/ initial groundwork for allowing alternative 'config sources' for pretrained model definitions and weights (generic local file / remote url support soon)
- SwinTransformer-V2 implementation added. Submitted by Christoph Reich. Training experiments and model changes by myself are ongoing so expect compat breaks.
- Swin-S3 (AutoFormerV2) models / weights added from https://github.com/microsoft/Cream/tree/main/AutoFormerV2
- MobileViT models w/ weights adapted from https://github.com/apple/ml-cvnets
- PoolFormer models w/ weights adapted from https://github.com/sail-sg/poolformer
- VOLO models w/ weights adapted from https://github.com/sail-sg/volo
- Significant work experimenting with non-BatchNorm norm layers such as EvoNorm, FilterResponseNorm, GroupNorm, etc
- Enhance support for alternate norm + act ('NormAct') layers added to a number of models, esp EfficientNet/MobileNetV3, RegNet, and aligned Xception
- Grouped conv support added to EfficientNet family
- Add 'group matching' API to all models to allow grouping model parameters for application of 'layer-wise' LR decay, lr scale added to LR scheduler
- Gradient checkpointing support added to many models
forward_head(x, pre_logits=False)
fn added to all models to allow separate calls of forward_features
+ forward_head
- All vision transformer and vision MLP models update to return non-pooled / non-token selected features from
foward_features
, for consistency with CNN models, token selection or pooling now applied in forward_head
Feb 2, 2022
- Chris Hughes posted an exhaustive run through of
timm
on his blog yesterday. Well worth a read. Getting Started with PyTorch Image Models (timm): A Practitioner’s Guide
- I'm currently prepping to merge the
norm_norm_norm
branch back to master (ver 0.6.x) in next week or so.
- The changes are more extensive than usual and may destabilize and break some model API use (aiming for full backwards compat). So, beware
pip install git+https://github.com/rwightman/pytorch-image-models
installs!
0.5.x
releases and a 0.5.x
branch will remain stable with a cherry pick or two until dust clears. Recommend sticking to pypi install for a bit if you want stable.
Jan 14, 2022
- Version 0.5.4 w/ release to be pushed to pypi. It's been a while since last pypi update and riskier changes will be merged to main branch soon....
- Add ConvNeXT models /w weights from official impl (https://github.com/facebookresearch/ConvNeXt), a few perf tweaks, compatible with timm features
- Tried training a few small (~1.8-3M param) / mobile optimized models, a few are good so far, more on the way...
mnasnet_small
- 65.6 top-1
mobilenetv2_050
- 65.9
lcnet_100/075/050
- 72.1 / 68.8 / 63.1
semnasnet_075
- 73
fbnetv3_b/d/g
- 79.1 / 79.7 / 82.0
- TinyNet models added by rsomani95
- LCNet added via MobileNetV3 architecture
Introduction
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.
Models
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.
Features
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:
- All models have a common default configuration interface and API for
- accessing/changing the classifier -
get_classifier
and reset_classifier
- doing a forward pass on just the features -
forward_features
(see documentation)
- these makes it easy to write consistent network wrappers that work with any of the models
- All models support multi-scale feature map extraction (feature pyramids) via create_model (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 map channel counts, reduction level (stride) can be queried AFTER model creation via the
.feature_info
member
- All models have a consistent pretrained weight loader that adapts last linear if necessary, and from 3 to 1 channel input if desired
- High performance reference training, validation, and inference scripts that work in several process/GPU modes:
- NVIDIA DDP w/ a single GPU per process, multiple processes with APEX present (AMP mixed-precision optional)
- PyTorch DistributedDataParallel w/ multi-gpu, single process (AMP disabled as it crashes when enabled)
- PyTorch w/ single GPU single process (AMP optional)
- A dynamic global pool implementation that allows selecting from average pooling, max pooling, average + max, or concat([average, max]) at model creation. All global pooling is adaptive average by default and compatible with pretrained weights.
- A 'Test Time Pool' wrapper that can wrap any of the included models and usually provides improved performance doing inference with input images larger than the training size. Idea adapted from original DPN implementation when I ported (https://github.com/cypw/DPNs)
- Learning rate schedulers
- Ideas adopted from
- Schedulers include
step
, cosine
w/ restarts, tanh
w/ restarts, plateau
- Optimizers:
- Random Erasing from Zhun Zhong (https://arxiv.org/abs/1708.04896)
- Mixup (https://arxiv.org/abs/1710.09412)
- CutMix (https://arxiv.org/abs/1905.04899)
- AutoAugment (https://arxiv.org/abs/1805.09501) and RandAugment (https://arxiv.org/abs/1909.13719) ImageNet configurations modeled after impl for EfficientNet training (https://github.com/tensorflow/tpu/blob/master/models/official/efficientnet/autoaugment.py)
- AugMix w/ JSD loss (https://arxiv.org/abs/1912.02781), JSD w/ clean + augmented mixing support works with AutoAugment and RandAugment as well
- SplitBachNorm - allows splitting batch norm layers between clean and augmented (auxiliary batch norm) data
- DropPath aka "Stochastic Depth" (https://arxiv.org/abs/1603.09382)
- DropBlock (https://arxiv.org/abs/1810.12890)
- Blur Pooling (https://arxiv.org/abs/1904.11486)
- Space-to-Depth by mrT23 (https://arxiv.org/abs/1801.04590) -- original paper?
- Adaptive Gradient Clipping (https://arxiv.org/abs/2102.06171, https://github.com/deepmind/deepmind-research/tree/master/nfnets)
- An extensive selection of channel and/or spatial attention modules:
Results
Model 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
.
Train, Validation, Inference Scripts
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 Resources
One 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 Segmentation
Computer Vision / Image Augmentation
Knowledge Distillation
Metric Learning
Training / Frameworks
Licenses
Code
The 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.
Pretrained Weights
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 ImageNet
Several 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.
Citing
BibTeX
@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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