mirror of
https://github.com/zebrajr/pytorch.git
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a458aa4b2a
Summary: Cleaning up the tagging system. Introducing tags EXCLUDE_FROM_{CONTEXT}.
Reviewed By: kennyhorror
Differential Revision: D4974842
fbshipit-source-id: b0fa6772299bb70afa2192c39e45191c9f41336a
66 lines
1.8 KiB
Python
66 lines
1.8 KiB
Python
## @package batch_mse_loss
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# Module caffe2.python.layers.batch_mse_loss
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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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from __future__ import unicode_literals
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from caffe2.python import schema
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from caffe2.python.layers.layers import (
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ModelLayer,
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)
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from caffe2.python.layers.tags import (
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Tags
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)
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import numpy as np
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class BatchMSELoss(ModelLayer):
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def __init__(self, model, input_record, name='batch_mse_loss', **kwargs):
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super(BatchMSELoss, self).__init__(model, name, input_record, **kwargs)
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assert schema.is_schema_subset(
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schema.Struct(
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('label', schema.Scalar()),
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('prediction', schema.Scalar())
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),
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input_record
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)
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self.tags.update(Tags.TRAIN_ONLY)
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self.output_schema = schema.Scalar(
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np.float32,
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model.net.NextScopedBlob(name + '_output'))
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def add_ops(self, net):
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prediction = net.Squeeze(
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self.input_record.prediction(),
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net.NextScopedBlob('squeezed_prediction'),
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dims=[1]
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)
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label = self.input_record.label.field_blobs()
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if self.input_record.label.field_type().base != (
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self.input_record.prediction.field_type().base):
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label = net.Cast(
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label,
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net.NextScopedBlob('cast_label'),
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to=schema.data_type_for_dtype(
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self.input_record.prediction.field_type()
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)
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)
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label = net.StopGradient(
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label,
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net.NextScopedBlob('stopped_label')
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)
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l2dist = net.SquaredL2Distance(
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[label, prediction],
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net.NextScopedBlob('l2')
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)
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net.AveragedLoss(l2dist, self.output_schema.field_blobs())
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