v0.8.2dev0 Release

Part way through the conversion of models to multi-weight support (model_arch.pretrain_tag), module reorg for future building, and lots of new weights and model additions as we go...

This is considered a development release. Please stick to 0.6.x if you need stability. Some of the model names, tags will shift a bit, some old names have already been deprecated and remapping support not added yet. For code 0.6.x branch is considered 'stable' https://github.com/rwightman/pytorch-image-models/tree/0.6.x

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)
  • original source: https://github.com/baaivision/EVA

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.
  • original source: https://github.com/baaivision/EVA
  • paper: https://arxiv.org/abs/2211.07636

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](https://huggingface.co/timm/maxvit_xlar...

v0.6.12 Release

Minor bug fixes to HF push_to_hub, plus some more MaxVit weights

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)

v0.6.11 Release

Changes Since 0.6.7

Sept 23, 2022

• CLIP LAION-2B pretrained B/32, L/14, H/14, and g/14 image tower weights as vit models (for fine-tune)

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

• CoAtNet (https://arxiv.org/abs/2106.04803) and MaxVit (https://arxiv.org/abs/2204.01697) timm original models
  • both found in maxxvit.py model def, contains numerous experiments outside scope of original papers
  • an unfinished Tensorflow version from MaxVit authors can be found https://github.com/google-research/maxvit
• Initial CoAtNet and MaxVit timm pretrained weights (working on more):
  • coatnet_nano_rw_224 - 81.7 @ 224 (T)
  • coatnet_rmlp_nano_rw_224 - 82.0 @ 224, 82.8 @ 320 (T)
  • coatnet_0_rw_224 - 82.4 (T) -- NOTE timm '0' coatnets have 2 more 3rd stage blocks
  • coatnet_bn_0_rw_224 - 82.4 (T)
  • maxvit_nano_rw_256 - 82.9 @ 256 (T)
  • coatnet_rmlp_1_rw_224 - 83.4 @ 224, 84 @ 320 (T)
  • coatnet_1_rw_224 - 83.6 @ 224 (G)
  • (T) = TPU trained with bits_and_tpu branch training code, (G) = GPU trained
• GCVit (weights adapted from https://github.com/NVlabs/GCVit, code 100% timm re-write for license purposes)
• MViT-V2 (multi-scale vit, adapted from https://github.com/facebookresearch/mvit)
• EfficientFormer (adapted from https://github.com/snap-research/EfficientFormer)
• PyramidVisionTransformer-V2 (adapted from https://github.com/whai362/PVT)
• 'Fast Norm' support for LayerNorm and GroupNorm that avoids float32 upcast w/ AMP (uses APEX LN if available for further boost)

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!

MaxxVit (CoAtNet, MaxVit, and related experimental weights)

CoAtNet (https://arxiv.org/abs/2106.04803) and MaxVit (https://arxiv.org/abs/2204.01697) timm trained weights

Weights were created reproducing the paper architectures and exploring timm sepcific additions such as ConvNeXt blocks, parallel partitioning, and other experiments.

Weights were trained on a mix of TPU and GPU systems. Bulk of weights were trained on TPU via the TRC program (https://sites.research.google/trc/about/).

CoAtNet variants run particularly well on TPU, it's a great combination. MaxVit is better suited to GPU due to the window partitioning, although there are some optimizations that can be made to improve TPU padding/utilization incl using 256x256 image size (8, 8) windo/grid size, and keeping format in NCHW for partition attention when using PyTorch XLA.

Glossary:

• coatnet - CoAtNet (MBConv + transformer blocks)
• coatnext - CoAtNet w/ ConvNeXt conv blocks
• maxvit - MaxViT (MBConv + block (ala swin) and grid partioning transformer blocks)
• maxxvit - MaxViT w/ ConvNeXt conv blocks
• rmlp - relative position embedding w/ MLP (can be resized) -- if this isn't in model name, it's using relative position bias (ala swin)
• rw - my variations on the model, slight differences in sizing / pooling / etc from Google paper spec

Results:

• maxvit_rmlp_pico_rw_256 - 80.5 @ 256, 81.3 @ 320 (T)
• coatnet_nano_rw_224 - 81.7 @ 224 (T)
• coatnext_nano_rw_224 - 82.0 @ 224 (G) -- (uses convnext block, no BatchNorm)
• coatnet_rmlp_nano_rw_224 - 82.0 @ 224, 82.8 @ 320 (T)
• coatnet_0_rw_224 - 82.4 (T) -- NOTE timm '0' coatnets have 2 more 3rd stage blocks
• coatnet_bn_0_rw_224 - 82.4 (T) -- all BatchNorm, no LayerNorm
• maxvit_nano_rw_256 - 82.9 @ 256 (T)
• maxvit_rmlp_nano_rw_256 - 83.0 @ 256, 83.6 @ 320 (T)
• maxxvit_rmlp_nano_rw_256 - 83.0 @ 256, 83.7 @ 320 (G) (uses convnext conv block, no BatchNorm)
• coatnet_rmlp_1_rw_224 - 83.4 @ 224, 84 @ 320 (T)
• maxvit_tiny_rw_224 - 83.5 @ 224 (G)
• coatnet_1_rw_224 - 83.6 @ 224 (G)
• maxvit_rmlp_tiny_rw_256 - 84.2 @ 256, 84.8 @ 320 (T)
• 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, hparms need tuning (uses convnext conv block, no BN)
• coatnet_rmlp_2_rw_224 - 84.6 @ 224, 85 @ 320 (T)

(T) = TPU trained with bits_and_tpu branch training code, (G) = GPU trained

More 3rd party ViT / ViT-hybrid weights

More weights for 3rd party ViT / ViT-CNN hybrids that needed remapping / re-hosting

EfficientFormer

Rehosted and remaped checkpoints from https://github.com/snap-research/EfficientFormer (originals in Google Drive)

GCViT

Heavily remaped from originals at https://github.com/NVlabs/GCVit due to from-scratch re-write of model code

NOTE: these checkpoints have a non-commercial CC-BY-NC-SA-4.0 license.

v0.6.7 Release

Minor bug fixes and a few more weights since 0.6.5

• 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

v0.6.5 Release

First official release in a long while (since 0.5.4). All change log since 0.5.4 below,

July 8, 2022

More models, more fixes

• Official research models (w/ weights) added:
  • EdgeNeXt from (https://github.com/mmaaz60/EdgeNeXt)
  • MobileViT-V2 from (https://github.com/apple/ml-cvnets)
  • DeiT III (Revenge of the ViT) from (https://github.com/facebookresearch/deit)
• 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/parsers. See (#1274 (comment))
• 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.

Swin Transformer V2 (CR) weights and experiments

This release holds weights for timm's variant of Swin V2 (from @ChristophReich1996 impl, https://github.com/ChristophReich1996/Swin-Transformer-V2)

NOTE: ns variants of the models have extra norms on the main branch at the end of each stage, this seems to help training. The current small model is not using this, but currently training one. Will have a non-ns tiny soon as well as a comparsion. in21k and 1k base models are also in the works...

small checkpoints trained on TPU-VM instances via the TPU-Research Cloud (https://sites.research.google/trc/about/)

• swin_v2_tiny_ns_224 - 81.80 top-1
• swin_v2_small_224 - 83.13 top-1
• swin_v2_small_ns_224 - 83.5 top-1

TPU VM trained weight release w/ PyTorch XLA

A wide range of mid-large sized models trained in PyTorch XLA on TPU VM instances. Demonstrating viability of the TPU + PyTorch combo for excellent image model results. All models trained w/ the bits_and_tpu branch of this codebase.

A big thanks to the TPU Research Cloud (https://sites.research.google/trc/about/) for the compute used in these experiments.

This set includes several novel weights, including EvoNorm-S RegNetZ (C/D timm variants) and ResNet-V2 model experiments, as well as custom pre-activation model variants of RegNet-Y (called RegNet-V) and Xception (Xception-P) models.

Many if not all of the included RegNet weights surpass original paper results by a wide margin and remain above other known results (e.g. recent torchvision updates) in ImageNet-1k validation and especially OOD test set / robustness performance and scaling to higher resolutions.

RegNets

• 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)

Alternative norm layers (no BN!)

• 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)

Xception redux

• xception41p - 82 @ 299 (timm pre-act)
• xception65 - 83.17 @ 299
• xception65p - 83.14 @ 299 (timm pre-act)

ResNets (w/ SE and/or NeXT)

• resnext101_64x4d - 82.46 @ 224, 83.16 @ 288
• seresnext101_32x8d - 83.57 @ 224, 84.27 @ 288
• seresnext101d_32x8d - 83.69 @ 224, 84.35 @ 288
• seresnextaa101d_32x8d - 83.85 @ 224, 84.57 @ 288
• resnetrs200 - 83.85 @ 256, 84.44 @ 320

Vision transformer experiments -- relpos, residual-post-norm, layer-scale, fc-norm, and GAP

• 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_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_base_patch16_rpn_224 - 82.3 @ 224 -- 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_224 - 82.5 @ 224, 83.6 @ 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)

MobileViT weights

Pretrained weights for MobileViT and MobileViT-V2 adapted from Apple impl at https://github.com/apple/ml-cvnets

Checkpoints remapped to timm impl of the model with BGR corrected to RGB (for V1).