File size: 2,246 Bytes
a89d9fd |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 |
# copyright (c) 2022 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.
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import paddle
from paddle import nn
from .rec_ctc_loss import CTCLoss
from .rec_sar_loss import SARLoss
class MultiLoss(nn.Layer):
def __init__(self, **kwargs):
super().__init__()
self.loss_funcs = {}
self.loss_list = kwargs.pop('loss_config_list')
self.weight_1 = kwargs.get('weight_1', 1.0)
self.weight_2 = kwargs.get('weight_2', 1.0)
self.gtc_loss = kwargs.get('gtc_loss', 'sar')
for loss_info in self.loss_list:
for name, param in loss_info.items():
if param is not None:
kwargs.update(param)
loss = eval(name)(**kwargs)
self.loss_funcs[name] = loss
def forward(self, predicts, batch):
self.total_loss = {}
total_loss = 0.0
# batch [image, label_ctc, label_sar, length, valid_ratio]
for name, loss_func in self.loss_funcs.items():
if name == 'CTCLoss':
loss = loss_func(predicts['ctc'],
batch[:2] + batch[3:])['loss'] * self.weight_1
elif name == 'SARLoss':
loss = loss_func(predicts['sar'],
batch[:1] + batch[2:])['loss'] * self.weight_2
else:
raise NotImplementedError(
'{} is not supported in MultiLoss yet'.format(name))
self.total_loss[name] = loss
total_loss += loss
self.total_loss['loss'] = total_loss
return self.total_loss
|