from keras.layers import *from keras.models import Modelprint 'Compiling two-path model...'# Input of the modelinput_model = Input(shape=(4,33,33))# Local pathway#Add first convolutionmodel_l = Convolution2D(64,7,7, border_mode='valid', activation='relu', W_regularizer=l1l2(l1=0.01, l2=0.01))(input_model)model_l = BatchNormalization(mode=0,axis=1)(model_l)model_l = MaxPooling2D(pool_size=(2,2),strides=(1,1))(model_l)model_l = Dropout(0.5)(model_l)#Add second convolutionmodel_l = Convolution2D(64,3,3, border_mode='valid', W_regularizer=l1l2(l1=0.01, l2=0.01), input_shape=(4,33,33))(model_l)model_l = BatchNormalization(mode=0,axis=1)(model_l)model_l = MaxPooling2D(pool_size=(4,4),strides=(1,1))(model_l)model_l = Dropout(0.5)(model_l)#global pathwaymodel_g = Convolution2D(160,12,12, border_mode='valid', activation='relu', W_regularizer=l1l2(l1=0.01, l2=0.01))(input_model)model_g = BatchNormalization(mode=0,axis=1)(model_g)model_g = MaxPooling2D(pool_size=(2,2), strides=(1,1))(model_g)model_g = Dropout(0.5)(model_g)# merge local and global pathwaysmerge = Merge(mode='concat', concat_axis=1)([model_l,model_g])merge = Convolution2D(5,21,21,border_mode='valid',W_regularizer=l1l2(l1=0.01, l2=0.01))(merge)merge = Flatten()(merge)predictions = Dense(5, activation='softmax')(merge)model_merged = Model(input=input_model,output=predictions)sgd = SGD(lr=0.001, decay=0.01, momentum=0.9)model_merged.compile(loss='categorical_crossentropy', optimizer=sgd, metrics=['accuracy'])print('Done')return model_merged这等效于您发布但通过Functional API定义的网络
如您所见，只有1个Input图层，使用了两次。然后，您可以像说的那样训练它：
model_merged.fit(X_train, Y_train, batch_size=self.batch_size, nb_epoch=self.n_epoch, validation_split=0.1, verbose=1)
这有帮助吗？
