Upload encoders/timm_gernet.py

encoders/timm_gernet.py

@@ -0,0 +1,124 @@
+from timm.models import ByoModelCfg, ByoBlockCfg, ByobNet
+
+from ._base import EncoderMixin
+import torch.nn as nn
+
+
+class GERNetEncoder(ByobNet, EncoderMixin):
+    def __init__(self, out_channels, depth=5, **kwargs):
+        super().__init__(**kwargs)
+        self._depth = depth
+        self._out_channels = out_channels
+        self._in_channels = 3
+
+        del self.head
+
+    def get_stages(self):
+        return [
+            nn.Identity(),
+            self.stem,
+            self.stages[0],
+            self.stages[1],
+            self.stages[2],
+            nn.Sequential(self.stages[3], self.stages[4], self.final_conv)
+        ]
+
+    def forward(self, x):
+        stages = self.get_stages()
+
+        features = []
+        for i in range(self._depth + 1):
+            x = stages[i](x)
+            features.append(x)
+
+        return features
+
+    def load_state_dict(self, state_dict, **kwargs):
+        state_dict.pop("head.fc.weight", None)
+        state_dict.pop("head.fc.bias", None)
+        super().load_state_dict(state_dict, **kwargs)
+
+
+regnet_weights = {
+    'timm-gernet_s': {
+        'imagenet': 'https://github.com/rwightman/pytorch-image-models/releases/download/v0.1-ger-weights/gernet_s-756b4751.pth',
+    },
+    'timm-gernet_m': {
+        'imagenet': 'https://github.com/rwightman/pytorch-image-models/releases/download/v0.1-ger-weights/gernet_m-0873c53a.pth',
+    },
+    'timm-gernet_l': {
+        'imagenet': 'https://github.com/rwightman/pytorch-image-models/releases/download/v0.1-ger-weights/gernet_l-f31e2e8d.pth',
+    },
+}
+
+pretrained_settings = {}
+for model_name, sources in regnet_weights.items():
+    pretrained_settings[model_name] = {}
+    for source_name, source_url in sources.items():
+        pretrained_settings[model_name][source_name] = {
+            "url": source_url,
+            'input_range': [0, 1],
+            'mean': [0.485, 0.456, 0.406],
+            'std': [0.229, 0.224, 0.225],
+            'num_classes': 1000
+        }
+
+timm_gernet_encoders = {
+    'timm-gernet_s': {
+        'encoder': GERNetEncoder,
+        "pretrained_settings": pretrained_settings["timm-gernet_s"],
+        'params': {
+            'out_channels': (3, 13, 48, 48, 384, 1920),
+            'cfg': ByoModelCfg(
+                blocks=(
+                    ByoBlockCfg(type='basic', d=1, c=48, s=2, gs=0, br=1.),
+                    ByoBlockCfg(type='basic', d=3, c=48, s=2, gs=0, br=1.),
+                    ByoBlockCfg(type='bottle', d=7, c=384, s=2, gs=0, br=1 / 4),
+                    ByoBlockCfg(type='bottle', d=2, c=560, s=2, gs=1, br=3.),
+                    ByoBlockCfg(type='bottle', d=1, c=256, s=1, gs=1, br=3.),
+                ),
+                stem_chs=13,
+                stem_pool=None,
+                num_features=1920,
+            )
+        },
+    },
+    'timm-gernet_m': {
+        'encoder': GERNetEncoder,
+        "pretrained_settings": pretrained_settings["timm-gernet_m"],
+        'params': {
+            'out_channels': (3, 32, 128, 192, 640, 2560),
+            'cfg': ByoModelCfg(
+                blocks=(
+                    ByoBlockCfg(type='basic', d=1, c=128, s=2, gs=0, br=1.),
+                    ByoBlockCfg(type='basic', d=2, c=192, s=2, gs=0, br=1.),
+                    ByoBlockCfg(type='bottle', d=6, c=640, s=2, gs=0, br=1 / 4),
+                    ByoBlockCfg(type='bottle', d=4, c=640, s=2, gs=1, br=3.),
+                    ByoBlockCfg(type='bottle', d=1, c=640, s=1, gs=1, br=3.),
+                ),
+                stem_chs=32,
+                stem_pool=None,
+                num_features=2560,
+            )
+        },
+    },
+    'timm-gernet_l': {
+        'encoder': GERNetEncoder,
+        "pretrained_settings": pretrained_settings["timm-gernet_l"],
+        'params': {
+            'out_channels': (3, 32, 128, 192, 640, 2560),
+            'cfg': ByoModelCfg(
+                blocks=(
+                    ByoBlockCfg(type='basic', d=1, c=128, s=2, gs=0, br=1.),
+                    ByoBlockCfg(type='basic', d=2, c=192, s=2, gs=0, br=1.),
+                    ByoBlockCfg(type='bottle', d=6, c=640, s=2, gs=0, br=1 / 4),
+                    ByoBlockCfg(type='bottle', d=5, c=640, s=2, gs=1, br=3.),
+                    ByoBlockCfg(type='bottle', d=4, c=640, s=1, gs=1, br=3.),
+                ),
+                stem_chs=32,
+                stem_pool=None,
+                num_features=2560,
+            )
+        },
+    },
+}