Вы можете использовать функциональные API-интерфейсы keras вместо последовательных API-интерфейсов, чтобы сделать это, как показано ниже:
from keras.models import Model
from keras.layers import Input
from keras.layers import Dense
from keras.layers import Flatten
from keras.layers.convolutional import Conv2D
from keras.layers.pooling import MaxPooling2D
num_classes = 10
inp= Input(shape=input_shape)
conv1 = Conv2D(32, kernel_size=(3,3), activation='relu')(inp)
conv2 = Conv2D(64, (3, 3), activation='relu')(conv1)
max_pool = MaxPooling2D(pool_size=(2, 2))(conv2)
flat = Flatten()(max_pool)
hidden1 = Dense(128, activation='relu')(flat)
output1 = Dense(num_classes, activation='softmax')(hidden1)
hidden2 = Dense(10, activation='relu')(flat) #specify the number of hidden units
output2 = Dense(3, activation='softmax')(hidden2) #specify the number of classes
model = Model(inputs=inp, outputs=[output1 ,output2])
ваша сеть выглядит следующим образом:
Model: "model_1"
__________________________________________________________________________________________________
Layer (type) Output Shape Param # Connected to
==================================================================================================
input_7 (InputLayer) (None, 64, 256, 256) 0
__________________________________________________________________________________________________
conv2d_10 (Conv2D) (None, 62, 254, 32) 73760 input_7[0][0]
__________________________________________________________________________________________________
conv2d_11 (Conv2D) (None, 60, 252, 64) 18496 conv2d_10[0][0]
__________________________________________________________________________________________________
max_pooling2d_4 (MaxPooling2D) (None, 30, 126, 64) 0 conv2d_11[0][0]
__________________________________________________________________________________________________
flatten_4 (Flatten) (None, 241920) 0 max_pooling2d_4[0][0]
__________________________________________________________________________________________________
dense_6 (Dense) (None, 128) 30965888 flatten_4[0][0]
__________________________________________________________________________________________________
dense_8 (Dense) (None, 10) 2419210 flatten_4[0][0]
__________________________________________________________________________________________________
dense_7 (Dense) (None, 10) 1290 dense_6[0][0]
__________________________________________________________________________________________________
dense_9 (Dense) (None, 3) 33 dense_8[0][0]
==================================================================================================
Total params: 33,478,677
Trainable params: 33,478,677
Non-trainable params: 0
Надеюсь, это поможет!