fix loss

ppcls/loss/distanceloss.py

+#copyright (c) 2021 PaddlePaddle Authors. All Rights Reserve.
+#
+#Licensed under the Apache License, Version 2.0 (the "License");
+#you may not use this file except in compliance with the License.
+#You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+#Unless required by applicable law or agreed to in writing, software
+#distributed under the License is distributed on an "AS IS" BASIS,
+#WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#See the License for the specific language governing permissions and
+#limitations under the License.
+
+import paddle
+import paddle.nn as nn
+import paddle.nn.functional as F
+
+from paddle.nn import L1Loss
+from paddle.nn import MSELoss as L2Loss
+from paddle.nn import SmoothL1Loss
+
+
+class DistanceLoss(nn.Layer):
+    """
+    DistanceLoss:
+        mode: loss mode
+    """
+
+    def __init__(self, mode="l2", **kargs):
+        super().__init__()
+        assert mode in ["l1", "l2", "smooth_l1"]
+        if mode == "l1":
+            self.loss_func = nn.L1Loss(**kargs)
+        elif mode == "l2":
+            self.loss_func = nn.MSELoss(**kargs)
+        elif mode == "smooth_l1":
+            self.loss_func = nn.SmoothL1Loss(**kargs)
+        self.mode = mode
+
+    def forward(self, x, y):
+        loss = self.loss_func(x, y)
+        return {"loss_{}".format(self.mode): loss}
\ No newline at end of file

ppcls/loss/distillationloss.py

+#copyright (c) 2021 PaddlePaddle Authors. All Rights Reserve.
+#
+#Licensed under the Apache License, Version 2.0 (the "License");
+#you may not use this file except in compliance with the License.
+#You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+#Unless required by applicable law or agreed to in writing, software
+#distributed under the License is distributed on an "AS IS" BASIS,
+#WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#See the License for the specific language governing permissions and
+#limitations under the License.
+
+import paddle
+import paddle.nn as nn
+
+from .celoss import CELoss
+from .dmlloss import DMLLoss
+from .distanceloss import DistanceLoss
+
+
+class DistillationCELoss(CELoss):
+    """
+    DistillationCELoss
+    """
+
+    def __init__(self,
+                 model_name_pairs=[],
+                 epsilon=None,
+                 key=None,
+                 name="loss_ce"):
+        super().__init__(epsilon=epsilon)
+        assert isinstance(model_name_pairs, list)
+        self.key = key
+        self.model_name_pairs = model_name_pairs
+        self.name = name
+
+    def forward(self, predicts, batch):
+        loss_dict = dict()
+        for idx, pair in enumerate(self.model_name_pairs):
+            out1 = predicts[pair[0]]
+            out2 = predicts[pair[1]]
+            if self.key is not None:
+                out1 = out1[self.key]
+                out2 = out2[self.key]
+            loss = super().forward(out1, out2)
+            for key in loss:
+                loss_dict["{}_{}_{}".format(key, pair[0], pair[1])] = loss[key]
+        return loss_dict
+
+
+class DistillationGTCELoss(CELoss):
+    """
+    DistillationGTCELoss
+    """
+
+    def __init__(self,
+                 model_names=[],
+                 epsilon=None,
+                 key=None,
+                 name="loss_gt_ce"):
+        super().__init__(epsilon=epsilon)
+        assert isinstance(model_names, list)
+        self.key = key
+        self.model_names = model_names
+        self.name = name
+
+    def forward(self, predicts, batch):
+        loss_dict = dict()
+        for idx, name in enumerate(self.model_names):
+            out = predicts[name]
+            if self.key is not None:
+                out = out[self.key]
+            loss = super().forward(out, batch)
+            for key in loss:
+                loss_dict["{}_{}".format(key, name)] = loss[key]
+        return loss_dict
+
+
+class DistillationDMLLoss(DMLLoss):
+    """
+    """
+
+    def __init__(self,
+                 model_name_pairs=[],
+                 act=None,
+                 key=None,
+                 name="loss_dml"):
+        super().__init__(act=act)
+        assert isinstance(model_name_pairs, list)
+        self.key = key
+        self.model_name_pairs = model_name_pairs
+        self.name = name
+
+    def forward(self, predicts, batch):
+        loss_dict = dict()
+        for idx, pair in enumerate(self.model_name_pairs):
+            out1 = predicts[pair[0]]
+            out2 = predicts[pair[1]]
+            if self.key is not None:
+                out1 = out1[self.key]
+                out2 = out2[self.key]
+            loss = super().forward(out1, out2)
+            if isinstance(loss, dict):
+                for key in loss:
+                    loss_dict["{}_{}_{}_{}".format(key, pair[0], pair[1],
+                                                   idx)] = loss[key]
+            else:
+                loss_dict["{}_{}".format(self.name, idx)] = loss
+        return loss_dict
+
+
+class DistillationDistanceLoss(DistanceLoss):
+    """
+    """
+
+    def __init__(self,
+                 mode="l2",
+                 model_name_pairs=[],
+                 key=None,
+                 name="loss_",
+                 **kargs):
+        super().__init__(mode=mode, **kargs)
+        assert isinstance(model_name_pairs, list)
+        self.key = key
+        self.model_name_pairs = model_name_pairs
+        self.name = name + "_l2"
+
+    def forward(self, predicts, batch):
+        loss_dict = dict()
+        for idx, pair in enumerate(self.model_name_pairs):
+            out1 = predicts[pair[0]]
+            out2 = predicts[pair[1]]
+            if self.key is not None:
+                out1 = out1[self.key]
+                out2 = out2[self.key]
+            loss = super().forward(out1, out2)
+            for key in loss:
+                loss_dict["{}_{}_{}".format(self.name, key, idx)] = loss[key]
+        return loss_dict