Add ECA-NFNet-L0 weights and update model name. Update README and bump version to 0.4.6

Author: rwightman

README.md

@@ -23,6 +23,15 @@ I'm fortunate to be able to dedicate significant time and money of my own suppor
 
 ## What's New
 
+### March 17, 2021
+* Add new ECA-NFNet-L0 (rename `nfnet_l0c`->`eca_nfnet_l0`) weights trained by myself.
+  * 82.6 top-1 @ 288x288, 82.8 @ 320x320, trained at 224x224
+  * Uses SiLU activation, approx 2x faster than `dm_nfnet_f0` and 50% faster than `nfnet_f0s` w/ 1/3 param count
+* Integrate [Hugging Face model hub](https://huggingface.co/models) into timm create_model and default_cfg handling for pretrained weight and config sharing (more on this soon!)
+* Merge HardCoRe NAS models contributed by https://github.com/yoniaflalo
+* Merge PyTorch trained EfficientNet-EL and pruned ES/EL variants contributed by [DeGirum](https://github.com/DeGirum)
+
+
 ### March 7, 2021
 * First 0.4.x PyPi release w/ NFNets (& related), ByoB (GPU-Efficient, RepVGG, etc).
 * Change feature extraction for pre-activation nets (NFNets, ResNetV2) to return features before activation.
@@ -171,6 +180,7 @@ A full version of the list below with source links can be found in the [document
     * MobileNet-V2 - https://arxiv.org/abs/1801.04381
     * Single-Path NAS - https://arxiv.org/abs/1904.02877
 * GPU-Efficient Networks - https://arxiv.org/abs/2006.14090
+* HardCoRe-NAS - https://arxiv.org/abs/2102.11646
 * HRNet - https://arxiv.org/abs/1908.07919
 * Inception-V3 - https://arxiv.org/abs/1512.00567
 * Inception-ResNet-V2 and Inception-V4 - https://arxiv.org/abs/1602.07261

timm/models/layers/std_conv.py

@@ -76,13 +76,13 @@ class ScaledStdConv2d(nn.Conv2d):
 
     def __init__(
             self, in_channels, out_channels, kernel_size, stride=1, padding=None, dilation=1, groups=1,
-            bias=True, gamma=1.0, eps=1e-5, use_layernorm=False):
+            bias=True, gamma=1.0, eps=1e-5, gain_init=1.0, use_layernorm=False):
         if padding is None:
             padding = get_padding(kernel_size, stride, dilation)
         super().__init__(
             in_channels, out_channels, kernel_size, stride=stride, padding=padding, dilation=dilation,
             groups=groups, bias=bias)
-        self.gain = nn.Parameter(torch.ones(self.out_channels, 1, 1, 1))
+        self.gain = nn.Parameter(torch.full((self.out_channels, 1, 1, 1), gain_init))
         self.scale = gamma * self.weight[0].numel() ** -0.5  # gamma * 1 / sqrt(fan-in)
         self.eps = eps ** 2 if use_layernorm else eps
         self.use_layernorm = use_layernorm  # experimental, slightly faster/less GPU memory to hijack LN kernel
@@ -110,12 +110,12 @@ class ScaledStdConv2dSame(nn.Conv2d):
 
     def __init__(
             self, in_channels, out_channels, kernel_size, stride=1, padding='SAME', dilation=1, groups=1,
-            bias=True, gamma=1.0, eps=1e-5, use_layernorm=False):
+            bias=True, gamma=1.0, eps=1e-5, gain_init=1.0, use_layernorm=False):
         padding, is_dynamic = get_padding_value(padding, kernel_size, stride=stride, dilation=dilation)
         super().__init__(
             in_channels, out_channels, kernel_size, stride=stride, padding=padding, dilation=dilation,
             groups=groups, bias=bias)
-        self.gain = nn.Parameter(torch.ones(self.out_channels, 1, 1, 1))
+        self.gain = nn.Parameter(torch.full((self.out_channels, 1, 1, 1), gain_init))
         self.scale = gamma * self.weight[0].numel() ** -0.5
         self.same_pad = is_dynamic
         self.eps = eps ** 2 if use_layernorm else eps

timm/models/nfnet.py

@@ -104,8 +104,8 @@ def _dcfg(url='', **kwargs):
         url='', pool_size=(7, 7), input_size=(3, 224, 224), test_input_size=(3, 288, 288)),
     nfnet_l0b=_dcfg(
         url='', pool_size=(7, 7), input_size=(3, 224, 224), test_input_size=(3, 288, 288)),
-    nfnet_l0c=_dcfg(
-        url='https://github.com/rwightman/pytorch-image-models/releases/download/v0.1-weights/nfnet_l0c-ad1045c2.pth',
+    eca_nfnet_l0=_dcfg(
+        url='https://github.com/rwightman/pytorch-image-models/releases/download/v0.1-weights/ecanfnet_l0_ra2-e3e9ac50.pth',
         pool_size=(7, 7), input_size=(3, 224, 224), test_input_size=(3, 288, 288), crop_pct=1.0),
 
     nf_regnet_b0=_dcfg(
@@ -238,7 +238,7 @@ def _dm_nfnet_cfg(depths, channels=(256, 512, 1536, 1536), act_layer='gelu', ski
     nfnet_l0b=_nfnet_cfg(
         depths=(1, 2, 6, 3), channels=(256, 512, 1536, 1536), feat_mult=1.5, group_size=64, bottle_ratio=0.25,
         attn_kwargs=dict(reduction_ratio=0.25, divisor=8), act_layer='silu'),
-    nfnet_l0c=_nfnet_cfg(
+    eca_nfnet_l0=_nfnet_cfg(
         depths=(1, 2, 6, 3), channels=(256, 512, 1536, 1536), feat_mult=1.5, group_size=64, bottle_ratio=0.25,
         attn_layer='eca', attn_kwargs=dict(), act_layer='silu'),
 
@@ -343,7 +343,7 @@ def __init__(
         else:
             self.attn = None
         self.act3 = act_layer()
-        self.conv3 = conv_layer(mid_chs, out_chs, 1)
+        self.conv3 = conv_layer(mid_chs, out_chs, 1, gain_init=1. if skipinit else 0.)
         if not reg and attn_layer is not None:
             self.attn_last = attn_layer(out_chs)  # ResNet blocks apply attn after conv3
         else:
@@ -804,11 +804,11 @@ def nfnet_l0b(pretrained=False, **kwargs):
 
 
 @register_model
-def nfnet_l0c(pretrained=False, **kwargs):
-    """ NFNet-L0c w/ SiLU
+def eca_nfnet_l0(pretrained=False, **kwargs):
+    """ ECA-NFNet-L0 w/ SiLU
     My experimental 'light' model w/ 1.5x final_conv mult, 64 group_size, .25 bottleneck & ECA attn
     """
-    return _create_normfreenet('nfnet_l0c', pretrained=pretrained, **kwargs)
+    return _create_normfreenet('eca_nfnet_l0', pretrained=pretrained, **kwargs)
 
 
 @register_model

timm/version.py

@@ -1 +1 @@
-__version__ = '0.4.5'
+__version__ = '0.4.6'