只需重新创建模型的第一部分,直到您希望输出的图层(在您的情况下只有第一个密集图层)。之后,您可以在新创建的模型中加载第一部分的训练重量并进行编译。
使用这个新模型预测的输出将是图层的输出(在您的情况下是第一个密集图层)。
from keras.models import Sequential
from keras.layers import Dense, Activation
import numpy as np
model = Sequential([
Dense(32, input_dim=784), # first number is output_dim
Activation('relu'),
Dense(10), # output_dim, input_dim is taken for granted from above
Activation('softmax'),
])
model.compile(optimizer='adam', loss='categorical_crossentropy')
#create some random data
n_features = 5
samples = np.random.randint(0, 10, 784*n_features).reshape(-1,784)
labels = np.arange(10*n_features).reshape(-1, 10)
#train your sample model
model.fit(samples, labels)
#create new model
new_model= Sequential([
Dense(32, input_dim=784), # first number is output_dim
Activation('relu')])
#set weights of the first layer
new_model.set_weights(model.layers[0].get_weights())
#compile it after setting the weights
new_model.compile(optimizer='adam', loss='categorical_crossentropy')
#get output of the first dens layer
output = new_model.predict(samples)