Merge pull request #2092 from huggingface/mesa_ema

ModelEMAV3 + MESA experiments

Author: rwightman

timm/data/transforms.py

@@ -32,16 +32,12 @@ def __call__(self, pil_img):
 
 
 class ToTensor:
-
+    """ ToTensor with no rescaling of values"""
     def __init__(self, dtype=torch.float32):
         self.dtype = dtype
 
     def __call__(self, pil_img):
-        np_img = np.array(pil_img, dtype=np.uint8)
-        if np_img.ndim < 3:
-            np_img = np.expand_dims(np_img, axis=-1)
-        np_img = np.rollaxis(np_img, 2)  # HWC to CHW
-        return torch.from_numpy(np_img).to(dtype=self.dtype)
+        return F.pil_to_tensor(pil_img).to(dtype=self.dtype)
 
 
 # Pillow is deprecating the top-level resampling attributes (e.g., Image.BILINEAR) in

timm/layers/classifier.py

@@ -180,10 +180,10 @@ def __init__(
         self.drop = nn.Dropout(drop_rate)
         self.fc = linear_layer(self.num_features, num_classes) if num_classes > 0 else nn.Identity()
 
-    def reset(self, num_classes, global_pool=None):
-        if global_pool is not None:
-            self.global_pool = SelectAdaptivePool2d(pool_type=global_pool)
-            self.flatten = nn.Flatten(1) if global_pool else nn.Identity()
+    def reset(self, num_classes, pool_type=None):
+        if pool_type is not None:
+            self.global_pool = SelectAdaptivePool2d(pool_type=pool_type)
+            self.flatten = nn.Flatten(1) if pool_type else nn.Identity()
         self.use_conv = self.global_pool.is_identity()
         linear_layer = partial(nn.Conv2d, kernel_size=1) if self.use_conv else nn.Linear
         if self.hidden_size:

timm/layers/create_act.py

@@ -148,7 +148,7 @@ def get_act_layer(name: Union[Type[nn.Module], str] = 'relu'):
     return _ACT_LAYER_DEFAULT[name]
 
 
-def create_act_layer(name: Union[nn.Module, str], inplace=None, **kwargs):
+def create_act_layer(name: Union[Type[nn.Module], str], inplace=None, **kwargs):
     act_layer = get_act_layer(name)
     if act_layer is None:
         return None

timm/models/__init__.py

@@ -39,6 +39,7 @@
 from .mvitv2 import *
 from .nasnet import *
 from .nest import *
+from .nextvit import *
 from .nfnet import *
 from .pit import *
 from .pnasnet import *

timm/models/davit.py

@@ -547,6 +547,17 @@ def _init_weights(self, m):
             if isinstance(m, nn.Linear) and m.bias is not None:
                 nn.init.constant_(m.bias, 0)
 
+    @torch.jit.ignore
+    def group_matcher(self, coarse=False):
+        return dict(
+            stem=r'^stem',  # stem and embed
+            blocks=r'^stages\.(\d+)' if coarse else [
+                (r'^stages\.(\d+).downsample', (0,)),
+                (r'^stages\.(\d+)\.blocks\.(\d+)', None),
+                (r'^norm_pre', (99999,)),
+            ]
+        )
+
     @torch.jit.ignore
     def set_grad_checkpointing(self, enable=True):
         self.grad_checkpointing = enable
@@ -558,7 +569,7 @@ def get_classifier(self):
         return self.head.fc
 
     def reset_classifier(self, num_classes, global_pool=None):
-        self.head.reset(num_classes, global_pool=global_pool)
+        self.head.reset(num_classes, global_pool)
 
     def forward_features(self, x):
         x = self.stem(x)