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我想能夠幾層在一起,但指定如下面的輸入,東西之前:如何鏈/組成層中keras 2官能API,而不指定輸入(或輸入形狀)
# conv is just a layer, no application
conv = Conv2D(64, (3,3), activation='relu', padding='same', name='conv')
# this doesn't work:
bn = BatchNormalization()(conv)
請注意,如果可以避免,我不想指定輸入或其形狀,但我希望在稍後的時間將它用作多個輸入的共享層。
有沒有辦法做到這一點?上述提供了以下錯誤:
>>> conv = Conv2D(64, (3,3), activation='relu', padding='same', name='conv')
>>> bn = BatchNormalization()(conv)
Traceback (most recent call last):
File "/home/mitchus/anaconda3/envs/tf/lib/python3.6/site-packages/keras/engine/topology.py", line 419, in assert_input_compatibility
K.is_keras_tensor(x)
File "/home/mitchus/anaconda3/envs/tf/lib/python3.6/site-packages/keras/backend/tensorflow_backend.py", line 393, in is_keras_tensor
raise ValueError('Unexpectedly found an instance of type `' + str(type(x)) + '`. '
ValueError: Unexpectedly found an instance of type `<class 'keras.layers.convolutional.Conv2D'>`. Expected a symbolic tensor instance.
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/mitchus/anaconda3/envs/tf/lib/python3.6/site-packages/keras/engine/topology.py", line 552, in __call__
self.assert_input_compatibility(inputs)
File "/home/mitchus/anaconda3/envs/tf/lib/python3.6/site-packages/keras/engine/topology.py", line 425, in assert_input_compatibility
str(inputs) + '. All inputs to the layer '
ValueError: Layer batch_normalization_4 was called with an input that isn't a symbolic tensor. Received type: <class 'keras.layers.convolutional.Conv2D'>. Full input: [<keras.layers.convolutional.Conv2D object at 0x7f3f6e54b748>]. All inputs to the layer should be tensors.
拼搶卷積層的輸出不會做的伎倆之一:
>>> bn = BatchNormalization()(conv.output)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/mitchus/anaconda3/envs/tf/lib/python3.6/site-packages/keras/engine/topology.py", line 941, in output
' has no inbound nodes.')
AttributeError: Layer conv has no inbound nodes.
聰明的解決方法! :)我想知道是否有更多的「慣用」方式,但似乎這應該是一種自然的功能。 – mitchus