def TrongNet(input_shape, num_classes, pretrained_weights=None):
input_image = layers.Input(shape=input_shape, name='input_1')
x = layers.Conv2D(filters=16,
kernel_size=(3, 3),
activation=activations.relu)(input_image)
x = layers.MaxPool2D(pool_size=(2, 2))(x)
x = layers.Conv2D(filters=64,
kernel_size=(3, 3),
activation=activations.relu)(x)
x = layers.MaxPool2D(pool_size=(2, 2))(x)
x = layers.Conv2D(filters=64,
kernel_size=(3, 3),
activation=activations.relu)(x)
x = layers.MaxPool2D(pool_size=(2, 2))(x)
x = layers.Conv2D(filters=128,
kernel_size=(3, 3),
activation=activations.relu)(x)
x = layers.MaxPool2D(pool_size=(2, 2))(x)
x = layers.BatchNormalization()(x)
x = layers.Flatten()(x)
x = layers.Dense(units=256, activation=activations.relu)(x)
x = layers.Dropout(0.3)(x)
x = layers.Dense(units=64, activation=activations.relu)(x)
x = layers.Dense(units=num_classes,
activation=activations.softmax,
name='predictions')(x)
model = models.Model(input_image, x, name='trongnet')
if pretrained_weights:
model.load_weights(pretrained_weights)
return model
def __init__(self):
super(Network, self).__init__()
self.mylayers = [
# unit1
layers.Conv2D(filters=32,
kernel_size=[5, 5],
padding='same',
activation=nn.relu),
layers.MaxPool2D(pool_size=[2, 2], strides=2, padding='same'),
# unit2
layers.Conv2D(filters=64,
kernel_size=[5, 5],
padding='same',
activation=nn.relu),
layers.MaxPool2D(pool_size=[2, 2], strides=2, padding='same'),
# flatten the tensor
layers.Flatten(),
# 2 full-connected layers
layers.Dense(512, activation=nn.relu),
layers.Dense(10, activation=nn.softmax)
# layers.Dense(10, activation=None)
]
# 根据tensorflow的版本确定网络的最后一层要不要加activation=nn.softmax
# 如果tf版本低于1.13:
# 则需要添加,
# 训练时在model.compile中设置loss=keras.losses.categorical_crossentropy
# 如果tf版本等于或者高于1.13:
# 则不需要添加,
# 训练时在model.compile中设置loss=keras.losses.CategoricalCrossentropy(from_logits=True)
self.net = Sequential(self.mylayers)
def network_1_m():
"""
network for memristor cnn simulink model
Total params: 8,230
Trainable params: 8,214
Non-trainable params: 16
acc: 0.983
:return: model
"""
inputs = kl.Input(shape=(8, 16, 1))
bone = kl.BatchNormalization(1)(inputs)
bone = kl.Conv2D(filters=8,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.MaxPool2D(pool_size=(2, 1), strides=(2, 1), padding='same')(bone)
bone = kl.Conv2D(filters=4,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.MaxPool2D(pool_size=(2, 1), strides=(2, 1), padding='same')(bone)
bone = kl.Flatten()(bone)
bone = kl.Dense(units=60, activation='relu')(bone)
outputs = kl.Dense(units=6, activation='softmax')(bone)
model = km.Model(inputs=inputs, outputs=outputs)
model.summary()
model.compile(optimizer='adam',
loss='categorical_crossentropy',
metrics=['accuracy'])
return model
def my_model():
# prep layers
inp = layers.Input(shape=(32, 32, 3))
x = layers.Conv2D(64, 3, padding='same')(inp)
x = layers.BatchNormalization(momentum=0.8)(x)
x = layers.LeakyReLU(alpha=0.1)(x)
# layer1
x = layers.Conv2D(128, 3, padding='same')(x)
x = layers.MaxPool2D()(x)
x = layers.BatchNormalization(momentum=0.8)(x)
x = layers.LeakyReLU(alpha=0.1)(x)
x = layers.Add()([x, residual(x, 128)])
# layer2
x = layers.Conv2D(256, 3, padding='same')(x)
x = layers.MaxPool2D()(x)
x = layers.BatchNormalization(momentum=0.8)(x)
x = layers.LeakyReLU(alpha=0.1)(x)
# layer3
x = layers.Conv2D(512, 3, padding='same')(x)
x = layers.MaxPool2D()(x)
x = layers.BatchNormalization(momentum=0.8)(x)
x = layers.LeakyReLU(alpha=0.1)(x)
x = layers.Add()([x, residual(x, 512)])
# layers4
x = layers.GlobalMaxPool2D()(x)
x = layers.Flatten()(x)
x = layers.Dense(10)(x)
x = layers.Activation('softmax', dtype='float32')(x)
model = tf.keras.Model(inputs=inp, outputs=x)
return model
def alex_net():
model = tf.keras.Sequential()
model.add(
layers.Conv2D(filters=96,
kernel_size=(11, 11),
strides=(4, 4),
padding='valid',
activation='relu',
input_shape=(227, 227, 3),
kernel_initializer='uniform'))
model.add(
layers.MaxPool2D(pool_size=(3, 3), strides=(2, 2), padding='valid'))
model.add(layers.BatchNormalization())
model.add(
layers.Conv2D(filters=256,
kernel_size=(5, 5),
strides=(1, 1),
padding='same',
activation='relu',
kernel_initializer='uniform'))
model.add(
layers.MaxPool2D(pool_size=(3, 3), strides=(2, 2), padding='valid'))
model.add(layers.BatchNormalization())
model.add(
layers.Conv2D(filters=384,
kernel_size=(3, 3),
strides=(1, 1),
padding='valid',
activation='relu',
kernel_initializer='uniform'))
model.add(
layers.Conv2D(filters=384,
kernel_size=(3, 3),
strides=(1, 1),
padding='valid',
activation='relu',
kernel_initializer='uniform'))
model.add(
layers.Conv2D(filters=256,
kernel_size=(3, 3),
strides=(1, 1),
padding='valid',
activation='relu',
kernel_initializer='uniform'))
model.add(layers.MaxPool2D(pool_size=(3, 3), strides=(2, 2)))
model.add(layers.Flatten())
model.add(layers.Dense(4096, activation=tf.keras.activations.relu))
model.add(layers.Dropout(0.5))
model.add(layers.Dense(4096, activation=tf.keras.activations.relu))
model.add(layers.Dropout(0.5))
model.add(layers.Dense(10, activation=tf.keras.activations.softmax))
return model
def __init__(self):
super(KerasModel, self).__init__()
weight_decay = 1e-4
self.conv1 = layers.Conv2D(
32, (3, 3),
padding='same',
input_shape=(32, 32, 3),
kernel_regularizer=regularizers.l2(weight_decay))
self.elu1 = layers.ELU()
self.bn1 = layers.BatchNormalization()
self.conv2 = layers.Conv2D(
32, (3, 3), kernel_regularizer=regularizers.l2(weight_decay))
self.elu2 = layers.ELU()
self.bn2 = layers.BatchNormalization()
self.pool1 = layers.MaxPool2D(pool_size=(2, 2))
self.dropout1 = layers.Dropout(rate=0.2)
self.conv3 = layers.Conv2D(
64, (3, 3),
padding='same',
kernel_regularizer=regularizers.l2(weight_decay))
self.elu3 = layers.ELU()
self.bn3 = layers.BatchNormalization()
self.conv4 = layers.Conv2D(
64, (3, 3), kernel_regularizer=regularizers.l2(weight_decay))
self.elu4 = layers.ELU()
self.bn4 = layers.BatchNormalization()
self.pool2 = layers.MaxPool2D(pool_size=(2, 2))
self.dropout2 = layers.Dropout(rate=0.3)
self.conv5 = layers.Conv2D(
128, (3, 3),
padding='same',
kernel_regularizer=regularizers.l2(weight_decay))
self.elu5 = layers.ELU()
self.bn5 = layers.BatchNormalization()
self.conv6 = layers.Conv2D(
128, (3, 3), kernel_regularizer=regularizers.l2(weight_decay))
self.elu6 = layers.ELU()
self.bn6 = layers.BatchNormalization()
self.pool3 = layers.MaxPool2D(pool_size=(2, 2))
self.dropout3 = layers.Dropout(rate=0.4)
self.flatten1 = layers.Flatten()
self.dense1 = layers.Dense(512)
self.elu7 = layers.ELU()
self.dropout4 = layers.Dropout(rate=0.5)
self.dense2 = layers.Dense(10)
self.softmax = layers.Softmax()
def network_1a():
"""
reference: An optimized Deep Convolutional Neural Network for dendrobium classification based on electronic nose
在原文基础上做了修改，加入BN层
acc=0.992~0.995, size=6.17Mb, time=0.95s
Total params: 534,214 (全连接层参数525312)
:return: model
"""
inputs = kl.Input(shape=(8, 16, 1))
bone = kl.BatchNormalization(1)(
inputs) # modified: 加入BN层，极大加快收敛速度并提高准确率 TODO 改为layernorm可能效果更好
bone = kl.Conv2D(filters=32,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.MaxPool2D(pool_size=(2, 1), strides=(2, 1), padding='same')(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.MaxPool2D(pool_size=(2, 1), strides=(2, 1), padding='same')(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.Flatten()(bone)
bone = kl.Dense(units=1024, activation='relu')(bone)
bone = kl.Dropout(0.7)(bone)
outputs = kl.Dense(units=6, activation='softmax')(bone)
model = km.Model(inputs=inputs, outputs=outputs)
model.summary()
model.compile(optimizer='adam',
loss='categorical_crossentropy',
metrics=['accuracy'])
return model
def ResNet9(input_size: Tuple[int, int, int] = (32, 32, 3),
classes: int = 10) -> tf.keras.Model:
"""A small 9-layer ResNet Tensorflow model for cifar10 image classification.
The model architecture is from https://github.com/davidcpage/cifar10-fast
Args:
input_size: The size of the input tensor (height, width, channels).
classes: The number of outputs the model should generate.
Raises:
ValueError: Length of `input_size` is not 3.
ValueError: `input_size`[0] or `input_size`[1] is not a multiple of 16.
Returns:
A TensorFlow ResNet9 model.
"""
_check_input_size(input_size)
# prep layers
inp = layers.Input(shape=input_size)
x = layers.Conv2D(64, 3, padding='same')(inp)
x = layers.BatchNormalization(momentum=0.8)(x)
x = layers.LeakyReLU(alpha=0.1)(x)
# layer1
x = layers.Conv2D(128, 3, padding='same')(x)
x = layers.MaxPool2D()(x)
x = layers.BatchNormalization(momentum=0.8)(x)
x = layers.LeakyReLU(alpha=0.1)(x)
x = layers.Add()([x, residual(x, 128)])
# layer2
x = layers.Conv2D(256, 3, padding='same')(x)
x = layers.MaxPool2D()(x)
x = layers.BatchNormalization(momentum=0.8)(x)
x = layers.LeakyReLU(alpha=0.1)(x)
# layer3
x = layers.Conv2D(512, 3, padding='same')(x)
x = layers.MaxPool2D()(x)
x = layers.BatchNormalization(momentum=0.8)(x)
x = layers.LeakyReLU(alpha=0.1)(x)
x = layers.Add()([x, residual(x, 512)])
# layers4
x = layers.GlobalMaxPool2D()(x)
x = layers.Flatten()(x)
x = layers.Dense(classes)(x)
x = layers.Activation('softmax', dtype='float32')(x)
model = tf.keras.Model(inputs=inp, outputs=x)
return model
def __init__(self):
super(CNN, self).__init__()
self.feature = models.Sequential([
layers.Conv2D(64, (3, 3),
activation=tf.nn.relu,
input_shape=(28, 28, 1)),
layers.MaxPool2D((2, 2)),
layers.Conv2D(64, (3, 3), activation=tf.nn.relu),
layers.MaxPool2D((2, 2)),
layers.Conv2D(64, (3, 3), activation=tf.nn.relu)
])
self.classifier = models.Sequential([
layers.Flatten(),
layers.Dense(64, activation=tf.nn.relu),
layers.Dense(10, activation=tf.nn.softmax)
])
def create_classifier():
with tf.name_scope("Disc"):
X = kl.Input((28, 28, 1), name="X")
layer = X
for l in range(3):
layer = kl.Conv2D(filters=64 * (2**l),
kernel_size=3,
padding="same",
use_bias=False,
activation="relu",
kernel_regularizer=kr.l2())(layer)
layer = kl.Conv2D(filters=64 * (2**l),
kernel_size=3,
padding="same",
use_bias=False,
activation="relu",
kernel_regularizer=kr.l2())(layer)
layer = kl.MaxPool2D()(layer)
layer = kl.BatchNormalization()(layer)
layer = kl.Flatten()(layer)
layer = kl.Dense(256, kernel_regularizer=kr.l2())(layer)
layer = kl.LeakyReLU()(layer)
D_out = kl.Dense(10, activation="softmax",
kernel_regularizer=kr.l2())(layer)
model = k.Model(inputs=X, outputs=D_out)
fidmodel = k.Model(inputs=X, outputs=layer)
return model, fidmodel
def network_1e():
"""
2层卷积层：BN+Conv(8)+Conv(8)+Maxpooling+FC(512)+FC(6)
acc=0.96~0.99, size=3Mb, time=0.05
:return: model
"""
inputs = kl.Input(shape=(8, 16, 1))
bone = kl.BatchNormalization(1)(inputs)
bone = kl.Conv2D(filters=8,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone) # 卷积核个数太少会影响效果
bone = kl.Conv2D(filters=8,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.MaxPool2D(pool_size=(2, 1), strides=(2, 1), padding='same')(bone)
bone = kl.Flatten()(bone)
bone = kl.Dense(units=512, activation='relu')(bone)
outputs = kl.Dense(units=6, activation='softmax')(bone)
model = km.Model(inputs=inputs, outputs=outputs)
model.summary()
model.compile(optimizer='adam',
loss='categorical_crossentropy',
metrics=['accuracy'])
return model
def network_1a_arcface():
"""
reference: An optimized Deep Convolutional Neural Network for dendrobium classification based on electronic nose
add arcface
:return: model
"""
inputs = kl.Input(shape=(8, 16, 1))
bone = kl.BatchNormalization(1)(
inputs) # modified: 加入BN层，极大加快收敛速度并提高准确率 TODO 改为layernorm可能效果更好
bone = kl.Conv2D(filters=32,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.MaxPool2D(pool_size=(2, 1), strides=(2, 1), padding='same')(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.MaxPool2D(pool_size=(2, 1), strides=(2, 1), padding='same')(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.Flatten()(bone)
bone = kl.Dense(units=1024,
activation='relu',
kernel_initializer='he_normal')(bone)
outputs = ArcFace(n_classes=6, s=1, m=0.35)(bone)
model = km.Model(inputs=inputs, outputs=outputs)
model.summary()
model.compile(optimizer='adam',
loss='categorical_crossentropy',
metrics=['accuracy'])
return model
def network_1a_5boards():
"""
reference: An optimized Deep Convolutional Neural Network for dendrobium classification based on electronic nose
改用5boards数据集，使用FC512
:return: model
"""
inputs = kl.Input(shape=(300, 8, 1))
bone = kl.BatchNormalization(1)(
inputs) # TODO 因为5boards数据相差不多，改为L2N层可能效果更好
bone = kl.Conv2D(filters=32,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.MaxPool2D(pool_size=(2, 1), strides=(2, 1), padding='same')(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.MaxPool2D(pool_size=(2, 1), strides=(2, 1), padding='same')(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.Flatten()(bone)
bone = kl.Dense(units=512, activation='relu')(bone)
outputs = kl.Dense(units=4, activation='softmax')(bone)
model = km.Model(inputs=inputs, outputs=outputs)
model.summary()
model.compile(optimizer='adam',
loss='categorical_crossentropy',
metrics=['accuracy'])
return model
def network_1a_SDA(summary=True):
"""
reference: An optimized Deep Convolutional Neural Network for dendrobium classification based on electronic nose
connected with SDA1
:return: model
"""
inputs = kl.Input(shape=(16, 1, 1))
# bone = kl.BatchNormalization(1)(inputs) # modified: 加入BN层，极大加快收敛速度并提高准确率
bone = kl.Conv2D(filters=32,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(inputs)
bone = kl.MaxPool2D(pool_size=(2, 1), strides=(2, 1), padding='same')(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.MaxPool2D(pool_size=(2, 1), strides=(2, 1), padding='same')(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.Flatten()(bone)
bone = kl.Dense(units=1024, activation='relu')(bone)
outputs = kl.Dense(units=6, activation='softmax')(bone)
model = km.Model(inputs=inputs, outputs=outputs)
if summary:
model.summary()
model.compile(optimizer='adam',
loss='categorical_crossentropy',
metrics=['accuracy'])
return model
def network_1b():
"""
将原文网络最后的FC层改为512个神经元
acc=0, size=, time=0
:return: model
"""
inputs = kl.Input(shape=(8, 16, 1))
bone = kl.BatchNormalization(1)(inputs) # modified: 加入BN层，极大加快收敛速度并提高准确率
bone = kl.Conv2D(filters=32,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.MaxPool2D(pool_size=(2, 1), strides=(2, 1), padding='same')(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.MaxPool2D(pool_size=(2, 1), strides=(2, 1), padding='same')(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.Conv2D(filters=16,
kernel_size=(2, 1),
padding='same',
activation='relu',
strides=(1, 1))(bone)
bone = kl.Flatten()(bone)
bone = kl.Dense(units=512, activation='relu')(bone)
outputs = kl.Dense(units=6, activation='softmax')(bone)
model = km.Model(inputs=inputs, outputs=outputs)
model.summary()
model.compile(optimizer='adam',
loss='categorical_crossentropy',
metrics=['accuracy'])
return model
def __init__(self, height, width, channels):
discriminator_input = layers.Input(shape=(height, width, channels))
x = layers.Conv2D(64, 5, padding='same')(discriminator_input)
x = layers.Activation('tanh')(x)
x = layers.MaxPool2D()(x)
x = layers.Conv2D(128, 5)(x)
x = layers.Activation('tanh')(x)
x = layers.MaxPool2D()(x)
x = layers.Flatten()(x)
x = layers.Dense(1024)(x)
x = layers.Activation('tanh')(x)
x = layers.Dense(1, activation='sigmoid')(x)
self.discriminator = tf.keras.models.Model(discriminator_input, x)
# compile discriminator
discriminator_optimizer = tf.keras.optimizers.SGD(lr=0.0005, momentum=0.9, nesterov=True)
self.discriminator.compile(optimizer=discriminator_optimizer, loss='binary_crossentropy')
def create_classifier():
with tf.name_scope("Disc"):
X = kl.Input((32, 32, 3), name="X")
layer = kl.Conv2D(filters=16,
kernel_size=3,
padding="same",
activation="relu")(X)
layer = kl.BatchNormalization()(layer)
layer = kl.Conv2D(filters=32,
kernel_size=3,
padding="same",
activation="relu")(layer)
layer = kl.BatchNormalization()(layer)
layer = kl.MaxPool2D()(layer)
layer = kl.Conv2D(filters=64,
kernel_size=4,
padding="same",
activation="relu")(layer)
layer = kl.BatchNormalization()(layer)
layer = kl.MaxPool2D()(layer)
layer = kl.Conv2D(filters=128,
kernel_size=4,
padding="same",
activation="relu")(layer)
layer = kl.BatchNormalization()(layer)
layer = kl.MaxPool2D()(layer)
layer = kl.Dropout(0.2)(layer)
layer = kl.Flatten()(layer)
fidout = layer
layer = kl.Dense(512, activation="relu")(layer)
layer = kl.Dropout(0.2)(layer)
D_out = kl.Dense(10, activation="softmax")(layer)
model = k.Model(inputs=X, outputs=D_out)
fidmodel = k.Model(inputs=X, outputs=fidout)
return model, fidmodel
def build_model():
# Create LeNet model
model = models.Sequential()
model.add(
layers.Conv2D(20, [3, 3],
input_shape=[28, 28, 1],
activation='relu',
name='conv_1'))
model.add(layers.MaxPool2D())
model.add(layers.Conv2D(50, [3, 3], activation='relu', name='conv_2'))
model.add(layers.MaxPool2D())
model.add(layers.Permute((2, 1, 3)))
model.add(layers.Flatten())
model.add(layers.Dense(500, activation='relu', name='dense_1'))
model.add(layers.Dense(10, activation='softmax', name='dense_2'))
compile_model(model)
return model
def max_pool1d(x, kernel_size=2, stride=2, padding='same'):
"""
Args:
x: input_tensor (N, L)
kernel_size: int
stride: int
padding: 'same' or 'valid'
Returns: tensor (N, L//ks)
"""
with tf.name_scope(max_pool1d.__name__):
_x = tf.expand_dims(x, axis=2)
_x = kl.MaxPool2D((kernel_size, 1), (stride, 1), padding)(_x)
_x = tf.squeeze(_x, axis=2)
return _x
def __init__(self, out_channels, activation='swish1', **kwargs):
self.conv1 = ConvBlock(out_channels, activation, add_maxpool=False)
self.conv2 = ConvBlock(out_channels, activation, add_maxpool=False)
self.conv3 = ConvBlock(out_channels,
activation=None,
add_maxpool=False)
self.nl = create_activation(activation)
self.maxpool = layers.MaxPool2D()
self.conv_res = layers.Conv2D(out_channels, 3, padding='same')
self.bn_res = layers.BatchNormalization()
self.out_channels = out_channels
super(ResidualBlock, self).__init__(**kwargs)
def __init__(self):
super(MyAlexNet, self).__init__()
self.Layers = [
layers.Conv2D(filters=48 , kernel_size=[3, 3], padding='same', activation=nn.relu, kernel_regularizer=regularizers.l2(hps.lamda)), # 64
layers.MaxPool2D(pool_size=[2, 2], strides=2, padding='same'),
layers.Conv2D(filters=128, kernel_size=[3, 3],padding='same', activation=nn.relu, kernel_regularizer=regularizers.l2(hps.lamda)), # 192
layers.MaxPool2D(pool_size=[2, 2], strides=2, padding='same'),
layers.Conv2D(filters=192, kernel_size=[3, 3], padding='same', activation=nn.relu, kernel_regularizer=regularizers.l2(hps.lamda)), # 384
layers.Conv2D(filters=192, kernel_size=[3, 3], padding='same', activation=nn.relu, kernel_regularizer=regularizers.l2(hps.lamda)), # 256
layers.Conv2D(filters=128, kernel_size=[3, 3], padding='same', activation=nn.relu, kernel_regularizer=regularizers.l2(hps.lamda)), # 256
layers.MaxPool2D(pool_size=[2, 2], strides=2, padding='same'),
layers.Flatten(),
layers.Dense(2048, activation=nn.relu, kernel_regularizer=regularizers.l2(hps.lamda)), # 2048
layers.Dense(2048, activation=nn.relu, kernel_regularizer=regularizers.l2(hps.lamda)), # 2048
layers.Dense(10, activation=nn.softmax, kernel_regularizer=regularizers.l2(hps.lamda)),
# layers.Dense(10, activation=None),
]
self.net = Sequential(self.Layers)
self.net.build(input_shape=[None, 32, 32, 3])
def encoder_block(a, n_filters):
a = layers.Conv2D(filters=n_filters,
kernel_size=(4, 4),
padding='same',
kernel_regularizer=regularizers.l1_l2(
l1=Config.l1_kernel_regularization,
l2=Config.l2_kernel_regularization))(a)
a = layers.BatchNormalization()(a)
a = layers.LeakyReLU()(a)
a = layers.MaxPool2D(pool_size=(2, 2))(a)
if Config.use_spatial_dropout:
a = layers.SpatialDropout2D(
rate=Config.spatial_dropout_rate)(a)
return a
def __init__(self,
block,
layer_sizes,
width_per_group=64,
replace_stride_with_dilation=None):
self.inplanes = 64
self.dilation = 1
if replace_stride_with_dilation is None:
# each element in the tuple indicates if we should replace
# the 2x2 stride with a dilated convolution instead
replace_stride_with_dilation = [False, False, False]
if len(replace_stride_with_dilation) != 3:
raise ValueError("replace_stride_with_dilation should be None "
"or a 3-element tuple, got {}".format(
replace_stride_with_dilation))
self.base_width = width_per_group
conv1 = layers.Conv2D(self.inplanes, (7, 7),
strides=(2, 2),
padding='same',
use_bias=False)
bn1 = layers.BatchNormalization()
relu = layers.ReLU()
maxpool = layers.MaxPool2D(pool_size=(3, 3),
strides=(2, 2),
padding='same')
self.layer0 = Sequential(layers=[conv1, bn1, relu, maxpool],
name='layer0')
self.layer1 = self._make_layer('layer1', block, 64, layer_sizes[0])
self.layer2 = self._make_layer('layer2',
block,
128,
layer_sizes[1],
stride=2,
dilate=replace_stride_with_dilation[0])
self.layer3 = self._make_layer('layer3',
block,
256,
layer_sizes[2],
stride=2,
dilate=replace_stride_with_dilation[1])
self.layer4 = self._make_layer('layer4',
block,
512,
layer_sizes[3],
stride=2,
dilate=replace_stride_with_dilation[2])
def add_vgg_conv_pool_stack(num_conv, filters, model):
"""
:param num_conv: Number of convolution layer stacks
:param filters: number of filters
:param model: keras/ tensroflow 2.0 model
:return:
"""
for i in range(num_conv):
model.add(
layers.Conv2D(filters=filters,
kernel_size=conv_filter,
activation='relu',
strides=conv_strides,
padding=conv_padding))
model.add(layers.MaxPool2D(pool_size=pool_size, strides=pool_stride))
def __init__(self, layer_dims, num_classes):
super(ResNet, self).__init__()
self.stem = Sequential([
layers.Conv2D(64, (3, 3), strides=(1, 1)),
layers.BatchNormalization(),
layers.Activation('relu'),
layers.MaxPool2D(pool_size=(2, 2), strides=(1, 1), padding='same')
])
self.layer1 = self.build_resblock(filter_num=64, blocks=layer_dims[0])
self.layer2 = self.build_resblock(filter_num=128, blocks=layer_dims[1], stride=2)
self.layer3 = self.build_resblock(filter_num=256, blocks=layer_dims[2], stride=2)
self.layer4 = self.build_resblock(filter_num=512, blocks=layer_dims[3], stride=2)
self.avg_pool = layers.GlobalAveragePooling2D()
self.fc = layers.Dense(units=num_classes)
def __init__(self, layer_dims, num_classes=10):
super(ResNet, self).__init__()
# 预处理层；一个63*3*3卷积层，加BN,relu激活再池化。
self.stem = Sequential([
layers.Conv2D(64, (3, 3), strides=(1, 1)),
layers.BatchNormalization(),
layers.Activation('relu'),
layers.MaxPool2D(pool_size=(2, 2), strides=(1, 1), padding='same')
])
# 创建4个Res Block
self.layer1 = self.build_resblock(64, layer_dims[0])
self.layer2 = self.build_resblock(128, layer_dims[1], stride=2)
self.layer3 = self.build_resblock(256, layer_dims[2], stride=2)
self.layer4 = self.build_resblock(512, layer_dims[3], stride=2)
self.avgpool = layers.GlobalAveragePooling2D()
self.fc = layers.Dense(num_classes)
def __init__(self, out_channels_1_1, reduce_channels_3_3, out_channels_3_3,
reduce_channels_5_5, out_channels_5_5, pool_proj, check):
super(Inception_Block, self).__init__()
assert out_channels_1_1 + out_channels_3_3 + out_channels_5_5 + pool_proj == check
self.inception_conv_1 = Sequential([
layers.Conv2D(filters=out_channels_1_1,
kernel_size=(1, 1),
padding='same'),
layers.BatchNormalization(),
layers.Activation('relu')
])
self.inception_conv_3 = Sequential([
layers.Conv2D(filters=reduce_channels_3_3,
kernel_size=(1, 1),
padding='same'),
layers.BatchNormalization(),
layers.Activation('relu'),
layers.Conv2D(filters=out_channels_3_3,
kernel_size=(3, 3),
padding='same'),
layers.BatchNormalization(),
layers.Activation('relu')
])
self.inception_conv_5 = Sequential([
layers.Conv2D(filters=reduce_channels_5_5,
kernel_size=(1, 1),
padding='same'),
layers.BatchNormalization(),
layers.Activation('relu'),
layers.Conv2D(filters=out_channels_5_5,
kernel_size=(3, 3),
padding='same'),
layers.BatchNormalization(),
layers.Activation('relu')
])
self.inception_conv_pool = Sequential([
layers.MaxPool2D(pool_size=(3, 3), strides=1, padding='same'),
layers.Conv2D(filters=pool_proj, kernel_size=(1, 1)),
layers.BatchNormalization(),
layers.Activation('relu')
])
def _build(self, params) -> None:
"""
Builds the convolutional network.
"""
# Get the main parameters of the network
img_size = params.image_size
in_channels = params.in_channels
out_channels = params.out_channels
num_labels = params.num_labels
bn_momentum = params.bn_momentum
channels = [out_channels, out_channels * 2, out_channels * 4]
for i, c in enumerate(channels):
self._model.add(
layers.Conv2D(filters=c,
kernel_size=(7, 7),
input_shape=(img_size, img_size, in_channels),
data_format='channels_last',
padding='same',
name='conv1_{i}'.format(i=i)))
self._model.add(
layers.BatchNormalization(momentum=bn_momentum,
name='batch_norm_{i}'.format(i=i)))
self._model.add(
layers.Activation('selu', name='selu1_{i}'.format(i=i)))
self._model.add(
layers.MaxPool2D(pool_size=(3, 3),
strides=(3, 3),
name='max_pool_{i}'.format(i=i),
padding='valid'))
self._model.add(layers.Flatten(name='flatt_1'))
self._model.add(
layers.Dense(units=128, name='last_linear', activation='linear'))
self._model.add(
layers.BatchNormalization(momentum=bn_momentum,
name='batch_norm_last'))
self._model.add(layers.Activation('selu', name='last_selu'))
self._model.add(
layers.Dense(units=num_labels,
name='classifier',
activation='sigmoid'))
def get_test_model_shared_convs(input_shape):
inputs = tf.keras.Input(shape=input_shape[1:], name='input')
conv1 = layers.Conv2D(512, 1, name='conv1', kernel_initializer='Ones',
bias_initializer='Ones')
conv2 = layers.Conv2D(1024, 3, name='conv2', kernel_initializer='Ones',
bias_initializer='Ones')
conv3 = layers.Conv2D(1024, 1, name='conv3', kernel_initializer='Ones',
bias_initializer='Ones')
maxpool = layers.MaxPool2D()
in1 = conv1(inputs)
in2 = maxpool(in1)
out1 = conv2(in1)
out2 = conv2(in2)
x = conv3(out1)
y = conv3(out2)
init_conv_weights(conv1.kernel)
init_conv_weights(conv2.kernel)
init_conv_weights(conv3.kernel)
return tf.keras.Model(inputs=inputs, outputs=[x, y])
def learn_inv_cov(self, var_scope='inv'):
'''
Unary precision matrix (inverse of the covariance matrix)
'''
self.learned_inv_covs = []
self.learned_log_det_inv_covs = []
for i in range(self.num_modules):
h = tf.concat([self.logits[i], self.last_feature[i]], axis=-1)
h = self.conv1_inv(h)
h_32 = layers.AveragePooling2D(pool_size=(2, 2),
strides=2,
name=var_scope + '_AvgPool2D')(h)
h_32 = self.conv2_inv(h_32)
h_8 = layers.MaxPool2D(pool_size=(4, 4),
strides=4,
name=var_scope + '_MaxPool2D')(h_32)
h_8 = tf.transpose(h_8, [0, 3, 1, 2])
h_8 = tf.reshape(h_8,
shape=[tf.shape(h_8)[0], self.FLAGS.num_lmks, 64])
h_8 = self.dense1(h_8)
h_8 = self.dense2(h_8)
h_8 = self.dense3(h_8)
# N C 2 2 chol
h_low = tf.contrib.distributions.fill_triangular(h_8) # lower
h_diag = tf.abs(tf.linalg.diag_part(h_low)) + 0.01
log_h_diag = tf.math.log(h_diag) # diagonal element >0
self.h = tf.linalg.set_diag(h_low, h_diag)
# N C 2 2
learned_inv_cov = tf.matmul(self.h, self.h,
transpose_b=True) # lower*upper
learned_log_det_inv_cov = 2 * tf.reduce_sum(log_h_diag, -1)
self.learned_inv_covs.append(learned_inv_cov)
self.learned_log_det_inv_covs.append(learned_log_det_inv_cov)
return self.learned_inv_covs, self.learned_log_det_inv_covs