forked from PulseFocusPlatform/PulseFocusPlatform
42 lines
1.5 KiB
Python
42 lines
1.5 KiB
Python
# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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import paddle
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import paddle.nn as nn
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from paddle.nn.initializer import Constant
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from ppdet.core.workspace import register
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__all__ = ['FairMOTLoss']
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@register
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class FairMOTLoss(nn.Layer):
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def __init__(self):
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super(FairMOTLoss, self).__init__()
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self.det_weight = self.create_parameter(
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shape=[1], default_initializer=Constant(-1.85))
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self.reid_weight = self.create_parameter(
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shape=[1], default_initializer=Constant(-1.05))
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def forward(self, det_loss, reid_loss):
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loss = paddle.exp(-self.det_weight) * det_loss + paddle.exp(
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-self.reid_weight) * reid_loss + (self.det_weight + self.reid_weight
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)
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loss *= 0.5
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return {'loss': loss}
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