基于keras输出中间层结果的2种实现方式

#coding=utf-8
import seaborn as sbn
import pylab as plt
import theano
from keras.models import Sequential
from keras.layers import Dense,Activation
 
 
from keras.models import Model
 
model = Sequential()
model.add(Dense(32, activation='relu', input_dim=100))
model.add(Dense(16, activation='relu',name="Dense_1"))
model.add(Dense(1, activation='sigmoid',name="Dense_2"))
model.compile(optimizer='rmsprop',
    loss='binary_crossentropy',
    metrics=['accuracy'])
 
# Generate dummy data
import numpy as np
#假设训练和测试使用同一组数据
data = np.random.random((1000, 100))
labels = np.random.randint(2, size=(1000, 1))
 
# Train the model, iterating on the data in batches of 32 samples
model.fit(data, labels, epochs=10, batch_size=32)
#已有的model在load权重过后
#取某一层的输出为输出新建为model，采用函数模型
dense1_layer_model = Model(inputs=model.input,
          outputs=model.get_layer('Dense_1').output)
#以这个model的预测值作为输出
dense1_output = dense1_layer_model.predict(data)
 
print dense1_output.shape
print dense1_output[0]

#这是一个theano的函数
dense1 = theano.function([model.layers[0].input],model.layers[1].output,allow_input_downcast=True)
dense1_output = dense1(data) #visualize these images's FC-layer feature
print dense1_output[0]