Add ConvNeXt-V2 support (model additions and weights) (#1614)

* Add ConvNeXt-V2 support (model additions and weights)

* ConvNeXt-V2 weights on HF Hub, tweaking some tests

* Update README, fixing convnextv2 tests

README.md

@@ -28,6 +28,11 @@ For a few months now, `timm` has been part of the Hugging Face ecosystem. Yearly
 If you have a couple of minutes and want to participate in shaping the future of the ecosystem, please share your thoughts:
 [**hf.co/oss-survey**](https://hf.co/oss-survey) 🙏
 
+### Jan 5, 2023
+* ConvNeXt-V2 models and weights added to existing `convnext.py`
+  * Paper: [ConvNeXt V2: Co-designing and Scaling ConvNets with Masked Autoencoders](http://arxiv.org/abs/2301.00808)
+  * Reference impl: https://github.com/facebookresearch/ConvNeXt-V2 (NOTE: weights currently CC-BY-NC)
+
 ### 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
@@ -396,6 +401,7 @@ A full version of the list below with source links can be found in the [document
 * CoaT (Co-Scale Conv-Attentional Image Transformers) - https://arxiv.org/abs/2104.06399
 * CoAtNet (Convolution and Attention) - https://arxiv.org/abs/2106.04803
 * ConvNeXt - https://arxiv.org/abs/2201.03545
+* ConvNeXt-V2 - http://arxiv.org/abs/2301.00808
 * ConViT (Soft Convolutional Inductive Biases Vision Transformers)- https://arxiv.org/abs/2103.10697
 * CspNet (Cross-Stage Partial Networks) - https://arxiv.org/abs/1911.11929
 * DeiT - https://arxiv.org/abs/2012.12877
@@ -418,6 +424,7 @@ A full version of the list below with source links can be found in the [document
     * Single-Path NAS - https://arxiv.org/abs/1904.02877
     * TinyNet - https://arxiv.org/abs/2010.14819
 * EVA - https://arxiv.org/abs/2211.07636
+* FlexiViT - https://arxiv.org/abs/2212.08013
 * GCViT (Global Context Vision Transformer) - https://arxiv.org/abs/2206.09959
 * GhostNet - https://arxiv.org/abs/1911.11907
 * gMLP - https://arxiv.org/abs/2105.08050

tests/test_models.py

@@ -38,7 +38,7 @@ if 'GITHUB_ACTIONS' in os.environ:
         '*efficientnet_l2*', '*resnext101_32x48d', '*in21k', '*152x4_bitm', '*101x3_bitm', '*50x3_bitm',
         '*nfnet_f3*', '*nfnet_f4*', '*nfnet_f5*', '*nfnet_f6*', '*nfnet_f7*', '*efficientnetv2_xl*',
         '*resnetrs350*', '*resnetrs420*', 'xcit_large_24_p8*', 'vit_huge*', 'vit_gi*', 'swin*huge*',
-        'swin*giant*']
+        'swin*giant*', 'convnextv2_huge*']
     NON_STD_EXCLUDE_FILTERS = ['vit_huge*', 'vit_gi*', 'swin*giant*', 'eva_giant*']
 else:
     EXCLUDE_FILTERS = []
@@ -129,7 +129,7 @@ def test_model_backward(model_name, batch_size):
 
 
 @pytest.mark.timeout(300)
-@pytest.mark.parametrize('model_name', list_models(exclude_filters=NON_STD_FILTERS))
+@pytest.mark.parametrize('model_name', list_models(exclude_filters=NON_STD_FILTERS, include_tags=True))
 @pytest.mark.parametrize('batch_size', [1])
 def test_model_default_cfgs(model_name, batch_size):
     """Run a single forward pass with each model"""
@@ -191,7 +191,7 @@ def test_model_default_cfgs(model_name, batch_size):
 
 
 @pytest.mark.timeout(300)
-@pytest.mark.parametrize('model_name', list_models(filter=NON_STD_FILTERS, exclude_filters=NON_STD_EXCLUDE_FILTERS))
+@pytest.mark.parametrize('model_name', list_models(filter=NON_STD_FILTERS, exclude_filters=NON_STD_EXCLUDE_FILTERS, include_tags=True))
 @pytest.mark.parametrize('batch_size', [1])
 def test_model_default_cfgs_non_std(model_name, batch_size):
     """Run a single forward pass with each model"""
@@ -304,7 +304,7 @@ if 'GITHUB_ACTIONS' in os.environ:  # and 'Linux' in platform.system():
 
 
 @pytest.mark.timeout(120)
-@pytest.mark.parametrize('model_name', list_models(exclude_filters=EXCLUDE_FILTERS + EXCLUDE_FEAT_FILTERS))
+@pytest.mark.parametrize('model_name', list_models(exclude_filters=EXCLUDE_FILTERS + EXCLUDE_FEAT_FILTERS, include_tags=True))
 @pytest.mark.parametrize('batch_size', [1])
 def test_model_forward_features(model_name, batch_size):
     """Run a single forward pass with each model in feature extraction mode"""

timm/layers/__init__.py

@@ -26,7 +26,7 @@ from .helpers import to_ntuple, to_2tuple, to_3tuple, to_4tuple, make_divisible,
 from .inplace_abn import InplaceAbn
 from .linear import Linear
 from .mixed_conv2d import MixedConv2d
-from .mlp import Mlp, GluMlp, GatedMlp, ConvMlp
+from .mlp import Mlp, GluMlp, GatedMlp, ConvMlp, GlobalResponseNormMlp
 from .non_local_attn import NonLocalAttn, BatNonLocalAttn
 from .norm import GroupNorm, GroupNorm1, LayerNorm, LayerNorm2d
 from .norm_act import BatchNormAct2d, GroupNormAct, convert_sync_batchnorm

timm/layers/grn.py

@@ -0,0 +1,39 @@
+""" Global Response Normalization Module
+
+Based on the GRN layer presented in
+`ConvNeXt-V2 - Co-designing and Scaling ConvNets with Masked Autoencoders` - https://arxiv.org/abs/2301.00808
+
+This implementation
+* works for both NCHW and NHWC tensor layouts
+* uses affine param names matching existing torch norm layers
+* slightly improves eager mode performance via fused addcmul
+
+Hacked together by / Copyright 2023 Ross Wightman
+"""
+
+import torch
+from torch import nn as nn
+
+
+class GlobalResponseNorm(nn.Module):
+    """ Global Response Normalization layer
+    """
+    def __init__(self, dim, eps=1e-6, channels_last=True):
+        super().__init__()
+        self.eps = eps
+        if channels_last:
+            self.spatial_dim = (1, 2)
+            self.channel_dim = -1
+            self.wb_shape = (1, 1, 1, -1)
+        else:
+            self.spatial_dim = (2, 3)
+            self.channel_dim = 1
+            self.wb_shape = (1, -1, 1, 1)
+
+        self.weight = nn.Parameter(torch.zeros(dim))
+        self.bias = nn.Parameter(torch.zeros(dim))
+
+    def forward(self, x):
+        x_g = x.norm(p=2, dim=self.spatial_dim, keepdim=True)
+        x_n = x_g / (x_g.mean(dim=self.channel_dim, keepdim=True) + self.eps)
+        return x + torch.addcmul(self.bias.view(self.wb_shape), self.weight.view(self.wb_shape), x * x_n)

timm/layers/mlp.py

@@ -2,25 +2,38 @@
 
 Hacked together by / Copyright 2020 Ross Wightman
 """
+from functools import partial
+
 from torch import nn as nn
 
+from .grn import GlobalResponseNorm
 from .helpers import to_2tuple
 
 
 class Mlp(nn.Module):
     """ MLP as used in Vision Transformer, MLP-Mixer and related networks
     """
-    def __init__(self, in_features, hidden_features=None, out_features=None, act_layer=nn.GELU, bias=True, drop=0.):
+    def __init__(
+            self,
+            in_features,
+            hidden_features=None,
+            out_features=None,
+            act_layer=nn.GELU,
+            bias=True,
+            drop=0.,
+            use_conv=False,
+    ):
         super().__init__()
         out_features = out_features or in_features
         hidden_features = hidden_features or in_features
         bias = to_2tuple(bias)
         drop_probs = to_2tuple(drop)
+        linear_layer = partial(nn.Conv2d, kernel_size=1) if use_conv else nn.Linear
 
-        self.fc1 = nn.Linear(in_features, hidden_features, bias=bias[0])
+        self.fc1 = linear_layer(in_features, hidden_features, bias=bias[0])
         self.act = act_layer()
         self.drop1 = nn.Dropout(drop_probs[0])
-        self.fc2 = nn.Linear(hidden_features, out_features, bias=bias[1])
+        self.fc2 = linear_layer(hidden_features, out_features, bias=bias[1])
         self.drop2 = nn.Dropout(drop_probs[1])
 
     def forward(self, x):
@@ -36,18 +49,29 @@ class GluMlp(nn.Module):
     """ MLP w/ GLU style gating
     See: https://arxiv.org/abs/1612.08083, https://arxiv.org/abs/2002.05202
     """
-    def __init__(self, in_features, hidden_features=None, out_features=None, act_layer=nn.Sigmoid, bias=True, drop=0.):
+    def __init__(
+            self,
+            in_features,
+            hidden_features=None,
+            out_features=None,
+            act_layer=nn.Sigmoid,
+            bias=True,
+            drop=0.,
+            use_conv=False,
+    ):
         super().__init__()
         out_features = out_features or in_features
         hidden_features = hidden_features or in_features
         assert hidden_features % 2 == 0
         bias = to_2tuple(bias)
         drop_probs = to_2tuple(drop)
+        linear_layer = partial(nn.Conv2d, kernel_size=1) if use_conv else nn.Linear
+        self.chunk_dim = 1 if use_conv else -1
 
-        self.fc1 = nn.Linear(in_features, hidden_features, bias=bias[0])
+        self.fc1 = linear_layer(in_features, hidden_features, bias=bias[0])
         self.act = act_layer()
         self.drop1 = nn.Dropout(drop_probs[0])
-        self.fc2 = nn.Linear(hidden_features // 2, out_features, bias=bias[1])
+        self.fc2 = linear_layer(hidden_features // 2, out_features, bias=bias[1])
         self.drop2 = nn.Dropout(drop_probs[1])
 
     def init_weights(self):
@@ -58,7 +82,7 @@ class GluMlp(nn.Module):
 
     def forward(self, x):
         x = self.fc1(x)
-        x, gates = x.chunk(2, dim=-1)
+        x, gates = x.chunk(2, dim=self.chunk_dim)
         x = x * self.act(gates)
         x = self.drop1(x)
         x = self.fc2(x)
@@ -70,8 +94,15 @@ class GatedMlp(nn.Module):
     """ MLP as used in gMLP
     """
     def __init__(
-            self, in_features, hidden_features=None, out_features=None, act_layer=nn.GELU,
-            gate_layer=None, bias=True, drop=0.):
+            self,
+            in_features,
+            hidden_features=None,
+            out_features=None,
+            act_layer=nn.GELU,
+            gate_layer=None,
+            bias=True,
+            drop=0.,
+    ):
         super().__init__()
         out_features = out_features or in_features
         hidden_features = hidden_features or in_features
@@ -104,8 +135,15 @@ class ConvMlp(nn.Module):
     """ MLP using 1x1 convs that keeps spatial dims
     """
     def __init__(
-            self, in_features, hidden_features=None, out_features=None, act_layer=nn.ReLU,
-            norm_layer=None, bias=True, drop=0.):
+            self,
+            in_features,
+            hidden_features=None,
+            out_features=None,
+            act_layer=nn.ReLU,
+            norm_layer=None,
+            bias=True,
+            drop=0.,
+    ):
         super().__init__()
         out_features = out_features or in_features
         hidden_features = hidden_features or in_features
@@ -124,3 +162,40 @@ class ConvMlp(nn.Module):
         x = self.drop(x)
         x = self.fc2(x)
         return x
+
+
+class GlobalResponseNormMlp(nn.Module):
+    """ MLP w/ Global Response Norm (see grn.py), nn.Linear or 1x1 Conv2d
+    """
+    def __init__(
+            self,
+            in_features,
+            hidden_features=None,
+            out_features=None,
+            act_layer=nn.GELU,
+            bias=True,
+            drop=0.,
+            use_conv=False,
+    ):
+        super().__init__()
+        out_features = out_features or in_features
+        hidden_features = hidden_features or in_features
+        bias = to_2tuple(bias)
+        drop_probs = to_2tuple(drop)
+        linear_layer = partial(nn.Conv2d, kernel_size=1) if use_conv else nn.Linear
+
+        self.fc1 = linear_layer(in_features, hidden_features, bias=bias[0])
+        self.act = act_layer()
+        self.drop1 = nn.Dropout(drop_probs[0])
+        self.grn = GlobalResponseNorm(hidden_features, channels_last=not use_conv)
+        self.fc2 = linear_layer(hidden_features, out_features, bias=bias[1])
+        self.drop2 = nn.Dropout(drop_probs[1])
+
+    def forward(self, x):
+        x = self.fc1(x)
+        x = self.act(x)
+        x = self.drop1(x)
+        x = self.grn(x)
+        x = self.fc2(x)
+        x = self.drop2(x)
+        return x

timm/models/convnext.py

@@ -1,16 +1,42 @@
 """ ConvNeXt
 
-Paper: `A ConvNet for the 2020s` - https://arxiv.org/pdf/2201.03545.pdf
-
-Original code and weights from https://github.com/facebookresearch/ConvNeXt, original copyright below
-
-Model defs atto, femto, pico, nano and _ols / _hnf variants are timm specific.
+Papers:
+* `A ConvNet for the 2020s` - https://arxiv.org/pdf/2201.03545.pdf
+@Article{liu2022convnet,
+  author  = {Zhuang Liu and Hanzi Mao and Chao-Yuan Wu and Christoph Feichtenhofer and Trevor Darrell and Saining Xie},
+  title   = {A ConvNet for the 2020s},
+  journal = {Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)},
+  year    = {2022},
+}
+
+* `ConvNeXt-V2 - Co-designing and Scaling ConvNets with Masked Autoencoders` - https://arxiv.org/abs/2301.00808
+@article{Woo2023ConvNeXtV2,
+  title={ConvNeXt V2: Co-designing and Scaling ConvNets with Masked Autoencoders},
+  author={Sanghyun Woo, Shoubhik Debnath, Ronghang Hu, Xinlei Chen, Zhuang Liu, In So Kweon and Saining Xie},
+  year={2023},
+  journal={arXiv preprint arXiv:2301.00808},
+}
+
+Original code and weights from:
+* https://github.com/facebookresearch/ConvNeXt, original copyright below
+* https://github.com/facebookresearch/ConvNeXt-V2, original copyright below
+
+Model defs atto, femto, pico, nano and _ols / _hnf variants are timm originals.
 
 Modifications and additions for timm hacked together by / Copyright 2022, Ross Wightman
 """
+# ConvNeXt
 # Copyright (c) Meta Platforms, Inc. and affiliates.
 # All rights reserved.
 # This source code is licensed under the MIT license
+
+# ConvNeXt-V2
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+# This source code is licensed under the license found in the
+# LICENSE file in the root directory of this source tree (Attribution-NonCommercial 4.0 International (CC BY-NC 4.0))
+# No code was used directly from ConvNeXt-V2, however the weights are CC BY-NC 4.0 so beware if using commercially.
+
 from collections import OrderedDict
 from functools import partial
 
@@ -18,8 +44,8 @@ import torch
 import torch.nn as nn
 
 from timm.data import IMAGENET_DEFAULT_MEAN, IMAGENET_DEFAULT_STD
-from timm.layers import trunc_normal_, SelectAdaptivePool2d, DropPath, ConvMlp, Mlp, LayerNorm2d, LayerNorm, \
-    create_conv2d, get_act_layer, make_divisible, to_ntuple
+from timm.layers import trunc_normal_, SelectAdaptivePool2d, DropPath, Mlp, GlobalResponseNormMlp, \
+    LayerNorm2d, LayerNorm, create_conv2d, get_act_layer, make_divisible, to_ntuple
 from ._builder import build_model_with_cfg
 from ._manipulate import named_apply, checkpoint_seq
 from ._pretrained import generate_default_cfgs
@@ -54,6 +80,7 @@ class ConvNeXtBlock(nn.Module):
             mlp_ratio=4,
             conv_mlp=False,
             conv_bias=True,
+            use_grn=False,
             ls_init_value=1e-6,
             act_layer='gelu',
             norm_layer=None,
@@ -64,14 +91,13 @@ class ConvNeXtBlock(nn.Module):
         act_layer = get_act_layer(act_layer)
         if not norm_layer:
             norm_layer = LayerNorm2d if conv_mlp else LayerNorm
-        mlp_layer = ConvMlp if conv_mlp else Mlp
+        mlp_layer = partial(GlobalResponseNormMlp if use_grn else Mlp, use_conv=conv_mlp)
         self.use_conv_mlp = conv_mlp
-
         self.conv_dw = create_conv2d(
             in_chs, out_chs, kernel_size=kernel_size, stride=stride, dilation=dilation, depthwise=True, bias=conv_bias)
         self.norm = norm_layer(out_chs)
         self.mlp = mlp_layer(out_chs, int(mlp_ratio * out_chs), act_layer=act_layer)
-        self.gamma = nn.Parameter(ls_init_value * torch.ones(out_chs)) if ls_init_value > 0 else None
+        self.gamma = nn.Parameter(ls_init_value * torch.ones(out_chs)) if ls_init_value is not None else None
         self.drop_path = DropPath(drop_path) if drop_path > 0. else nn.Identity()
 
     def forward(self, x):
@@ -106,6 +132,7 @@ class ConvNeXtStage(nn.Module):
             ls_init_value=1.0,
             conv_mlp=False,
             conv_bias=True,
+            use_grn=False,
             act_layer='gelu',
             norm_layer=None,
             norm_layer_cl=None
@@ -138,6 +165,7 @@ class ConvNeXtStage(nn.Module):
                 ls_init_value=ls_init_value,
                 conv_mlp=conv_mlp,
                 conv_bias=conv_bias,
+                use_grn=use_grn,
                 act_layer=act_layer,
                 norm_layer=norm_layer if conv_mlp else norm_layer_cl
             ))
@@ -184,6 +212,7 @@ class ConvNeXt(nn.Module):
             head_norm_first=False,
             conv_mlp=False,
             conv_bias=True,
+            use_grn=False,
             act_layer='gelu',
             norm_layer=None,
             drop_rate=0.,
@@ -247,6 +276,7 @@ class ConvNeXt(nn.Module):
                 ls_init_value=ls_init_value,
                 conv_mlp=conv_mlp,
                 conv_bias=conv_bias,
+                use_grn=use_grn,
                 act_layer=act_layer,
                 norm_layer=norm_layer,
                 norm_layer_cl=norm_layer_cl
@@ -259,10 +289,11 @@ class ConvNeXt(nn.Module):
 
         # if head_norm_first == true, norm -> global pool -> fc ordering, like most other nets
         # otherwise pool -> norm -> fc, the default ConvNeXt ordering (pretrained FB weights)
+        self.head_norm_first = head_norm_first
         self.norm_pre = norm_layer(self.num_features) if head_norm_first else nn.Identity()
         self.head = nn.Sequential(OrderedDict([
                 ('global_pool', SelectAdaptivePool2d(pool_type=global_pool)),
-                ('norm', nn.Identity() if head_norm_first else norm_layer(self.num_features)),
+                ('norm', nn.Identity() if head_norm_first or num_classes == 0 else norm_layer(self.num_features)),
                 ('flatten', nn.Flatten(1) if global_pool else nn.Identity()),
                 ('drop', nn.Dropout(self.drop_rate)),
                 ('fc', nn.Linear(self.num_features, num_classes) if num_classes > 0 else nn.Identity())]))
@@ -293,7 +324,14 @@ class ConvNeXt(nn.Module):
         if global_pool is not None:
             self.head.global_pool = SelectAdaptivePool2d(pool_type=global_pool)
             self.head.flatten = nn.Flatten(1) if global_pool else nn.Identity()
-        self.head.fc = nn.Linear(self.num_features, num_classes) if num_classes > 0 else nn.Identity()
+        if num_classes == 0:
+            self.head.norm = nn.Identity()
+            self.head.fc = nn.Identity()
+        else:
+            if not self.head_norm_first:
+                norm_layer = type(self.stem[-1])  # obtain type from stem norm
+                self.head.norm = norm_layer(self.num_features)
+            self.head.fc = nn.Linear(self.num_features, num_classes)
 
     def forward_features(self, x):
         x = self.stem(x)
@@ -342,6 +380,10 @@ def checkpoint_filter_fn(state_dict, model):
         k = re.sub(r'downsample_layers.([0-9]+).([0-9]+)', r'stages.\1.downsample.\2', k)
         k = k.replace('dwconv', 'conv_dw')
         k = k.replace('pwconv', 'mlp.fc')
+        if 'grn' in k:
+            k = k.replace('grn.beta', 'mlp.grn.bias')
+            k = k.replace('grn.gamma', 'mlp.grn.weight')
+            v = v.reshape(v.shape[-1])
         k = k.replace('head.', 'head.fc.')
         if k.startswith('norm.'):
             k = k.replace('norm', 'head.norm')
@@ -372,6 +414,20 @@ def _cfg(url='', **kwargs):
     }
 
 
+def _cfgv2(url='', **kwargs):
+    return {
+        'url': url,
+        'num_classes': 1000, 'input_size': (3, 224, 224), 'pool_size': (7, 7),
+        'crop_pct': 0.875, 'interpolation': 'bicubic',
+        'mean': IMAGENET_DEFAULT_MEAN, 'std': IMAGENET_DEFAULT_STD,
+        'first_conv': 'stem.0', 'classifier': 'head.fc',
+        'license': 'cc-by-nc-4.0', 'paper_ids': 'arXiv:2301.00808',
+        'paper_name': 'ConvNeXt-V2: Co-designing and Scaling ConvNets with Masked Autoencoders',
+        'origin_url': 'https://github.com/facebookresearch/ConvNeXt-V2',
+        **kwargs
+    }
+
+
 default_cfgs = generate_default_cfgs({
     # timm specific variants
     'convnext_atto.d2_in1k': _cfg(
@@ -499,6 +555,115 @@ default_cfgs = generate_default_cfgs({
         url="https://dl.fbaipublicfiles.com/convnext/convnext_xlarge_22k_224.pth",
         hf_hub_id='timm/',
         num_classes=21841),
+
+    'convnextv2_nano.fcmae_ft_in22k_in1k': _cfgv2(
+        url='https://dl.fbaipublicfiles.com/convnext/convnextv2/im22k/convnextv2_nano_22k_224_ema.pt',
+        hf_hub_id='timm/',
+        test_input_size=(3, 288, 288), test_crop_pct=1.0),
+    'convnextv2_nano.fcmae_ft_in22k_in1k_384': _cfgv2(
+        url='https://dl.fbaipublicfiles.com/convnext/convnextv2/im22k/convnextv2_nano_22k_384_ema.pt',
+        hf_hub_id='timm/',
+        input_size=(3, 384, 384), pool_size=(12, 12), crop_pct=1.0, crop_mode='squash'),
+    'convnextv2_tiny.fcmae_ft_in22k_in1k': _cfgv2(
+        url="https://dl.fbaipublicfiles.com/convnext/convnextv2/im22k/convnextv2_tiny_22k_224_ema.pt",
+        hf_hub_id='timm/',
+        test_input_size=(3, 288, 288), test_crop_pct=1.0),
+    'convnextv2_tiny.fcmae_ft_in22k_in1k_384': _cfgv2(
+        url="https://dl.fbaipublicfiles.com/convnext/convnextv2/im22k/convnextv2_tiny_22k_384_ema.pt",
+        hf_hub_id='timm/',
+        input_size=(3, 384, 384), pool_size=(12, 12), crop_pct=1.0, crop_mode='squash'),
+    'convnextv2_base.fcmae_ft_in22k_in1k': _cfgv2(
+        url="https://dl.fbaipublicfiles.com/convnext/convnextv2/im22k/convnextv2_base_22k_224_ema.pt",
+        hf_hub_id='timm/',
+        test_input_size=(3, 288, 288), test_crop_pct=1.0),
+    'convnextv2_base.fcmae_ft_in22k_in1k_384': _cfgv2(
+        url="https://dl.fbaipublicfiles.com/convnext/convnextv2/im22k/convnextv2_base_22k_384_ema.pt",
+        hf_hub_id='timm/',
+        input_size=(3, 384, 384), pool_size=(12, 12), crop_pct=1.0, crop_mode='squash'),
+    'convnextv2_large.fcmae_ft_in22k_in1k': _cfgv2(
+        url="https://dl.fbaipublicfiles.com/convnext/convnextv2/im22k/convnextv2_large_22k_224_ema.pt",
+        hf_hub_id='timm/',
+        test_input_size=(3, 288, 288), test_crop_pct=1.0),
+    'convnextv2_large.fcmae_ft_in22k_in1k_384': _cfgv2(
+        url="https://dl.fbaipublicfiles.com/convnext/convnextv2/im22k/convnextv2_large_22k_384_ema.pt",
+        hf_hub_id='timm/',
+        input_size=(3, 384, 384), pool_size=(12, 12), crop_pct=1.0, crop_mode='squash'),
+    'convnextv2_huge.fcmae_ft_in22k_in1k_384': _cfgv2(
+        url="https://dl.fbaipublicfiles.com/convnext/convnextv2/im22k/convnextv2_huge_22k_384_ema.pt",
+        hf_hub_id='timm/',
+        input_size=(3, 384, 384), pool_size=(12, 12), crop_pct=1.0, crop_mode='squash'),
+    'convnextv2_huge.fcmae_ft_in22k_in1k_512': _cfgv2(
+        url="https://dl.fbaipublicfiles.com/convnext/convnextv2/im22k/convnextv2_huge_22k_512_ema.pt",
+        hf_hub_id='timm/',
+        input_size=(3, 512, 512), pool_size=(15, 15), crop_pct=1.0, crop_mode='squash'),
+
+    'convnextv2_atto.fcmae_ft_in1k': _cfgv2(
+        url='https://dl.fbaipublicfiles.com/convnext/convnextv2/im1k/convnextv2_atto_1k_224_ema.pt',
+        hf_hub_id='timm/',
+        test_input_size=(3, 288, 288), test_crop_pct=0.95),
+    'convnextv2_femto.fcmae_ft_in1k': _cfgv2(
+        url='https://dl.fbaipublicfiles.com/convnext/convnextv2/im1k/convnextv2_femto_1k_224_ema.pt',
+        hf_hub_id='timm/',
+        test_input_size=(3, 288, 288), test_crop_pct=0.95),
+    'convnextv2_pico.fcmae_ft_in1k': _cfgv2(
+        url='https://dl.fbaipublicfiles.com/convnext/convnextv2/im1k/convnextv2_pico_1k_224_ema.pt',
+        hf_hub_id='timm/',
+        test_input_size=(3, 288, 288), test_crop_pct=0.95),
+    'convnextv2_nano.fcmae_ft_in1k': _cfgv2(
+        url='https://dl.fbaipublicfiles.com/convnext/convnextv2/im1k/convnextv2_nano_1k_224_ema.pt',
+        hf_hub_id='timm/',
+        test_input_size=(3, 288, 288), test_crop_pct=1.0),
+    'convnextv2_tiny.fcmae_ft_in1k': _cfgv2(
+        url="https://dl.fbaipublicfiles.com/convnext/convnextv2/im1k/convnextv2_tiny_1k_224_ema.pt",
+        hf_hub_id='timm/',
+        test_input_size=(3, 288, 288), test_crop_pct=1.0),
+    'convnextv2_base.fcmae_ft_in1k': _cfgv2(
+        url="https://dl.fbaipublicfiles.com/convnext/convnextv2/im1k/convnextv2_base_1k_224_ema.pt",
+        hf_hub_id='timm/',
+        test_input_size=(3, 288, 288), test_crop_pct=1.0),
+    'convnextv2_large.fcmae_ft_in1k': _cfgv2(
+        url="https://dl.fbaipublicfiles.com/convnext/convnextv2/im1k/convnextv2_large_1k_224_ema.pt",
+        hf_hub_id='timm/',
+        test_input_size=(3, 288, 288), test_crop_pct=1.0),
+    'convnextv2_huge.fcmae_ft_in1k': _cfgv2(
+        url="https://dl.fbaipublicfiles.com/convnext/convnextv2/im1k/convnextv2_huge_1k_224_ema.pt",
+        hf_hub_id='timm/',
+        test_input_size=(3, 288, 288), test_crop_pct=1.0),
+
+    'convnextv2_atto.fcmae': _cfgv2(
+        url='https://dl.fbaipublicfiles.com/convnext/convnextv2/pt_only/convnextv2_atto_1k_224_fcmae.pt',
+        hf_hub_id='timm/',
+        num_classes=0),
+    'convnextv2_femto.fcmae': _cfgv2(
+        url='https://dl.fbaipublicfiles.com/convnext/convnextv2/pt_only/convnextv2_femto_1k_224_fcmae.pt',
+        hf_hub_id='timm/',
+        num_classes=0),
+    'convnextv2_pico.fcmae': _cfgv2(
+        url='https://dl.fbaipublicfiles.com/convnext/convnextv2/pt_only/convnextv2_pico_1k_224_fcmae.pt',
+        hf_hub_id='timm/',
+        num_classes=0),
+    'convnextv2_nano.fcmae': _cfgv2(
+        url='https://dl.fbaipublicfiles.com/convnext/convnextv2/pt_only/convnextv2_nano_1k_224_fcmae.pt',
+        hf_hub_id='timm/',
+        num_classes=0),
+    'convnextv2_tiny.fcmae': _cfgv2(
+        url="https://dl.fbaipublicfiles.com/convnext/convnextv2/pt_only/convnextv2_tiny_1k_224_fcmae.pt",
+        hf_hub_id='timm/',
+        num_classes=0),
+    'convnextv2_base.fcmae': _cfgv2(
+        url="https://dl.fbaipublicfiles.com/convnext/convnextv2/pt_only/convnextv2_base_1k_224_fcmae.pt",
+        hf_hub_id='timm/',
+        num_classes=0),
+    'convnextv2_large.fcmae': _cfgv2(
+        url="https://dl.fbaipublicfiles.com/convnext/convnextv2/pt_only/convnextv2_large_1k_224_fcmae.pt",
+        hf_hub_id='timm/',
+        num_classes=0),
+    'convnextv2_huge.fcmae': _cfgv2(
+        url="https://dl.fbaipublicfiles.com/convnext/convnextv2/pt_only/convnextv2_huge_1k_224_fcmae.pt",
+        hf_hub_id='timm/',
+        num_classes=0),
+
+    'convnextv2_small.untrained': _cfg(),
 })
 
 
@@ -623,3 +788,75 @@ def convnext_xxlarge(pretrained=False, **kwargs):
     model_args = dict(depths=[3, 4, 30, 3], dims=[384, 768, 1536, 3072], **kwargs)
     model = _create_convnext('convnext_xxlarge', pretrained=pretrained, **model_args)
     return model
+
+
+@register_model
+def convnextv2_atto(pretrained=False, **kwargs):
+    # timm femto variant (NOTE: still tweaking depths, will vary between 3-4M param, current is 3.7M
+    model_args = dict(
+        depths=(2, 2, 6, 2), dims=(40, 80, 160, 320), use_grn=True, ls_init_value=None, conv_mlp=True, **kwargs)
+    model = _create_convnext('convnextv2_atto', pretrained=pretrained, **model_args)
+    return model
+
+
+@register_model
+def convnextv2_femto(pretrained=False, **kwargs):
+    # timm femto variant
+    model_args = dict(
+        depths=(2, 2, 6, 2), dims=(48, 96, 192, 384), use_grn=True, ls_init_value=None, conv_mlp=True, **kwargs)
+    model = _create_convnext('convnextv2_femto', pretrained=pretrained, **model_args)
+    return model
+
+
+@register_model
+def convnextv2_pico(pretrained=False, **kwargs):
+    # timm pico variant
+    model_args = dict(
+        depths=(2, 2, 6, 2), dims=(64, 128, 256, 512), use_grn=True, ls_init_value=None, conv_mlp=True, **kwargs)
+    model = _create_convnext('convnextv2_pico', pretrained=pretrained, **model_args)
+    return model
+
+
+@register_model
+def convnextv2_nano(pretrained=False, **kwargs):
+    # timm nano variant with standard stem and head
+    model_args = dict(
+        depths=(2, 2, 8, 2), dims=(80, 160, 320, 640), use_grn=True, ls_init_value=None, conv_mlp=True, **kwargs)
+    model = _create_convnext('convnextv2_nano', pretrained=pretrained, **model_args)
+    return model
+
+
+@register_model
+def convnextv2_tiny(pretrained=False, **kwargs):
+    model_args = dict(
+        depths=(3, 3, 9, 3), dims=(96, 192, 384, 768), use_grn=True, ls_init_value=None, **kwargs)
+    model = _create_convnext('convnextv2_tiny', pretrained=pretrained, **model_args)
+    return model
+
+
+@register_model
+def convnextv2_small(pretrained=False, **kwargs):
+    model_args = dict(depths=[3, 3, 27, 3], dims=[96, 192, 384, 768], use_grn=True, ls_init_value=None, **kwargs)
+    model = _create_convnext('convnextv2_small', pretrained=pretrained, **model_args)
+    return model
+
+
+@register_model
+def convnextv2_base(pretrained=False, **kwargs):
+    model_args = dict(depths=[3, 3, 27, 3], dims=[128, 256, 512, 1024], use_grn=True, ls_init_value=None, **kwargs)
+    model = _create_convnext('convnextv2_base', pretrained=pretrained, **model_args)
+    return model
+
+
+@register_model
+def convnextv2_large(pretrained=False, **kwargs):
+    model_args = dict(depths=[3, 3, 27, 3], dims=[192, 384, 768, 1536], use_grn=True, ls_init_value=None, **kwargs)
+    model = _create_convnext('convnextv2_large', pretrained=pretrained, **model_args)
+    return model
+
+
+@register_model
+def convnextv2_huge(pretrained=False, **kwargs):
+    model_args = dict(depths=[3, 3, 27, 3], dims=[352, 704, 1408, 2816], use_grn=True, ls_init_value=None, **kwargs)
+    model = _create_convnext('convnextv2_huge', pretrained=pretrained, **model_args)
+    return model