Tensorflow2.0 모델을 만드는 방법

Sequential API를 이용하는 방법

model = tf.keras.Sequential([

tf.keras.layers.Conv2D(32, 3, activation=relu,

                                               kernel_regualrizer=tf.keras.regularizers.l2(0.04),

                                               input_shape=(28, 28, 1)),

tf.keras.layers.MaxPooling2D(),

tf.keras.layers.Flatten(),

tf.keras.layers.Dropout(0.2),

tf.keras.layers.Dense(64, activation='relu'),

tf.keras.layers.BatchNormalization(),

tf.keras.layers.Dense(10, activation='softmax') ])

 

Functional API를 이용하는 방법

input = keras.Input(shape=(28, 28, 1), name='img')

x = layers.Conv2D(16, 3, activation='relu')(input)

x = layers.Conv2D(32, 3, activation='relu')(x)

x = layers.MaxPooling2D(3)(x)

x = layers.Conv2D(32, 3, activation='relu')(x)

x = layers.Conv2D(16, 3, activation='relu')(x)

output = layers.GlobalMaxPooling2D()(x)

encoder = keras.Model(input, output, name='encoder')

Model Subclassing을 이용하는 방법

class ResNet(tf.keras.Model):

    def __init__(self):

        super(ResNet, self).__init__()

        self.block_1 = ResNetBlock()

        self.block_2 = ResNetBlock()

        self.global_pool = layers.GlobalAveragePooling2D()

        self.classifier = Dense(num_classes)

    def call(self, inputs):

        x = self.block_1(input)

        x = self.block_2(x)

        x = self.global_pool(x)

        return self.classifier(x)

Layer List를 이용하는 방법

layer_list = [layer1, layer2, ..., layern]

new_model = tf.keras.Sequential(layer_list)

## 또는

new_model = tf.kears.Sequential(layers=layer_list)