我想从预训练的 Keras 模型中删除前N层。例如,一个EfficientNetB0
,它的前3层只负责预处理:
import tensorflow as tf
efinet = tf.keras.applications.EfficientNetB0(weights=None, include_top=True)
print(efinet.layers[:3])
# [<tensorflow.python.keras.engine.input_layer.InputLayer at 0x7fa9a870e4d0>,
# <tensorflow.python.keras.layers.preprocessing.image_preprocessing.Rescaling at 0x7fa9a61343d0>,
# <tensorflow.python.keras.layers.preprocessing.normalization.Normalization at 0x7fa9a60d21d0>]
正如M.Innat提到的,第一层是一个Input Layer
,应该保留或重新附加。我想删除这些层,但是像这样的简单方法会引发错误:
cut_input_model = return tf.keras.Model(
inputs=[efinet.layers[3].input],
outputs=efinet.outputs
)
这将导致:
ValueError: Graph disconnected: cannot obtain value for tensor KerasTensor(...)
推荐的方法是什么?