labels = LB.fit_transform(labels)
labels = to_categorical(labels)
print(labels)
(X_train, X_test, Y_train, Y_test) = train_test_split(data,
labels,
test_size=0.20,
stratify=labels,
random_state=42)
trainAug = ImageDataGenerator(rotation_range=15, fill_mode="nearest")
bModel = VGG16(weights="imagenet",
include_top=False,
input_tensor=Input(shape=(224, 224, 3))) #base_Model
hModel = bModel.output #head_Model
hModel = AveragePooling2D(pool_size=(4, 4))(hModel)
hModel = Flatten(name="flatten")(hModel)
hModel = Dense(64, activation="relu")(hModel)
hModel = Dropout(0.5)(hModel)
hModel = Dense(2, activation="softmax")(hModel)
model = Model(inputs=bModel.input, outputs=hModel)
for layer in bModel.layers:
layer.trainable = False
X_train.shape, X_test.shape, Y_train.shape, Y_test.shape
W_grid = 4 #width
L_grid = 4 #lenth
fig, axes = plt.subplots(L_grid, W_grid, figsize=(25, 25)) #subplots
axes = axes.ravel()
n_training = len(X_train)
for i in np.arange(0, L_grid * W_grid):
## Specify model
model = Sequential()
# Input layer
model.add(
Conv2D(20,
kernel_size=(3, 3),
activation='relu',
input_shape=(img_rows, img_cols, 1)))
# (number of convolutions/filters, size of the conv, activation function
# Hidden layers
model.add(Dropout(0.3))
model.add(Conv2D(20, kernel_size=(3, 3), activation='relu'))
model.add(Dropout(0.3))
#model.add(Conv2D(20, kernel_size=(3, 3), activation='relu'))
model.add(Flatten()) # Flatten layer
# Convert the output of the previous layers into a 1D representation
model.add(Dense(128, activation='relu')) # Dense layer with 128 nodes
# Perform usually better when adding a dense layer in between
# the flatten layer and the final layer
# Output layer
model.add(Dense(num_classes, activation='softmax'))
## Compile model
model.compile(loss=keras.losses.categorical_crossentropy,
optimizer='adam',
metrics=['accuracy'])
## Fit model
model.fit(x, y, batch_size=128, epochs=2, validation_split=0.2)
# Starting to construct the model
print('Starting to construct model')
# Loading the DenseNet model pre_trained on the imageNet, simultaneously cut off the original FC_Layer
base_model = DenseNet201(weights='imagenet',
include_top=False,
input_tensor=Input(shape=(224, 224, 3)))
# It is compulsory for the base_model to freeze each layer,
# which result will never train again in the network.
for layer in base_model.layers:
layer.trainable = False
# To construct the our own ful_connection layer will be placed on top of the base model
head_model = base_model.output
head_model = MaxPooling2D(pool_size=(7, 7))(head_model)
head_model = Flatten(name='flatten')(head_model)
head_model = Dense(64, activation='relu')(head_model)
head_model = Dense(128, activation='relu')(head_model)
head_model = Dropout(0.5)(head_model)
head_model = Dense(3, activation='softmax')(head_model)
# Place the head_model on the top of the base model
model = Model(inputs=base_model.input,
outputs=head_model)
# Compile model
print("compiling model...")
adam_optimize = Adam(learning_rate=learning_rate)
model.compile(loss='categorical_crossentropy',
optimizer=adam_optimize,
metrics=['accuracy'])
def build_generator_cifar(architecture='Dense3',
input_shape=[32, 32, 3],
num_classes=10):
if architecture == 'ResNet12v1':
model = G_resnet(n=1, num_filters=16)
elif architecture == 'ResNet22v2':
model = G_resnet(n=2, num_filters=16, inner_loop_concat=True)
elif architecture == 'ResNet12v2':
model = G_resnet(n=1, num_filters=16, inner_loop_concat=True)
elif architecture == 'ResNet20Xiao':
model = G_resnet(n=1,
num_filters=8,
block_strides=[1, 2, 2, 1, 1, 1, 1, 1 / 2, 1 / 2])
elif architecture == 'Dense2':
# 2 Dense Layers
image = Input(shape=input_shape)
target = Input(shape=(num_classes, ))
#target_int = Lambda(lambda x:K.argmax(x,axis=-1))(target)
x1 = Flatten()(image)
#x2 = Embedding(10,20,input_length=1)(target_int)
#x2 = Lambda(lambda x: K.squeeze(x, -2))(x2)
x = Concatenate(axis=-1)([x1, target])
x = Dense(2048,
kernel_initializer='glorot_normal',
bias_initializer='zeros')(x)
x = BatchNormalization()(x)
x = Activation('relu')(x)
x = Dense(np.prod(input_shape),
activation='sigmoid',
bias_initializer='zeros')(x)
x = Reshape(input_shape)(x)
model = Model(inputs=[image, target], outputs=x, name='model_G')
elif architecture == 'Dense3':
# 3 Dense Layers
image = Input(shape=input_shape)
target = Input(shape=(num_classes, ))
x1 = Flatten()(image)
x = Concatenate(axis=-1)([x1, target])
print(x)
x = Dense(1024,
kernel_initializer='glorot_normal',
bias_initializer='zeros')(x)
x = BatchNormalization()(x)
x = Activation('relu')(x)
x = Dense(1024,
kernel_initializer='glorot_normal',
bias_initializer='zeros')(x)
x = BatchNormalization()(x)
x = Activation('relu')(x)
x = Dense(np.prod(input_shape),
activation='sigmoid',
bias_initializer='zeros')(x)
x = Reshape(input_shape)(x)
model = Model(inputs=[image, target], outputs=x, name='model_G')
elif architecture == 'Dense4':
image = Input(shape=input_shape)
target = Input(shape=(num_classes, ))
x1 = Flatten()(image)
x = Concatenate(axis=-1)([x1, target])
x = Dense(1024,
kernel_initializer='glorot_normal',
bias_initializer='zeros')(x)
x = BatchNormalization()(x)
x = Activation('relu')(x)
x = Dense(1024,
kernel_initializer='glorot_normal',
bias_initializer='zeros')(x)
x = BatchNormalization()(x)
x = Activation('relu')(x)
x = Dense(1024,
kernel_initializer='glorot_normal',
bias_initializer='zeros')(x)
x = BatchNormalization()(x)
x = Activation('relu')(x)
x = Dense(np.prod(input_shape),
activation='sigmoid',
bias_initializer='zeros')(x)
x = Reshape(input_shape)(x)
model = Model(inputs=[image, target], outputs=x, name='model_G')
print('Model Generator Name', model.name)
if is_keras_loadable(model, architecture):
return model
def build_cnn(num_filter, len_filter, num_layer, num_channels, len_input,
num_classes):
"""
Function returning a keras model.
Parameters
----------
num_filter: int
Number of filters / kernels in the conv layer
len_filter: float
Length of the filters / kernels in the conv layer as fraction of inputlength
num_layer: int
Number of convlutional layers in the model
num_channels: int
Number of channels of the input
len_input: int
Number of dimensions of the input
num_classes: int
Number of classes in the dataset = Number of outputs
Returns
-------
model: sequential keras model
Keras CNN model ready to be trained
"""
model = Sequential()
# First Conv Layer
model.add(
Conv1D(filters=num_filter,
kernel_size=int(len_filter * len_input),
strides=1,
padding="same",
activation='relu',
input_shape=(len_input, num_channels),
name='block1_conv1'))
model.add(
MaxPooling1D(pool_size=2,
strides=2,
padding="same",
name='block1_pool'))
# Other Conv Layers
for l in range(2, num_layer + 1):
model.add(
Conv1D(filters=num_filter * l,
kernel_size=int(len_filter * len_input),
strides=1,
padding="same",
activation='relu',
name='block' + str(l) + '_conv1'))
model.add(
MaxPooling1D(pool_size=2,
strides=2,
padding="same",
name='block' + str(l) + '_pool'))
model.add(Flatten(name='flatten'))
model.add(Dense(100, activation='relu', name='fc1'))
model.add(Dense(num_classes, activation='softmax', name='predictions'))
model.compile(optimizer='adam',
loss='sparse_categorical_crossentropy',
metrics=['accuracy'])
plot_model(model, dpi=300, show_shapes=True, to_file='models\\cnn.png')
return model
height_shift_range=0.2,
shear_range=0.15,
horizontal_flip=True,
fill_mode="nearest")
# load the MobileNetV2 network, ensuring the head FC layer sets are
# left off
baseModel = MobileNetV2(weights="imagenet",
include_top=False,
input_tensor=Input(shape=(224, 224, 3)))
# construct the head of the model that will be placed on top of the
# the base model
headModel = baseModel.output
headModel = AveragePooling2D(pool_size=(7, 7))(headModel)
headModel = Flatten(name="flatten")(headModel)
headModel = Dense(128, activation="relu")(headModel)
headModel = Dropout(0.5)(headModel)
headModel = Dense(2, activation="softmax")(headModel)
# place the head FC model on top of the base model (this will become
# the actual model we will train)
model = Model(inputs=baseModel.input, outputs=headModel)
# loop over all layers in the base model and freeze them so they will
# *not* be updated during the first training process
for layer in baseModel.layers:
layer.trainable = False
# compile our model
print("[INFO] compiling model...")
activation='relu',
strides=(2, 2),
name='en_conv_2')(conv_1)
conv_3 = Conv2D(filters,
kernel_size=num_conv,
padding='same',
activation='relu',
strides=1,
name='en_conv_3')(conv_2)
conv_4 = Conv2D(filters,
kernel_size=num_conv,
padding='same',
activation='relu',
strides=1,
name='en_conv_4')(conv_3)
flat = Flatten()(conv_4)
hidden = Dense(intermediate_dim, activation='relu', name='en_dense_5')(flat)
Z_mu = Dense(K, name='en_mu')(hidden)
Z_lsgms = Dense(K, name='en_var')(hidden)
def sampling(args):
Z_mu, Z_lsgms = args
epsilon = backend.random_normal(shape=(backend.shape(Z_mu)[0], K),
mean=0.,
stddev=1.0)
return Z_mu + backend.exp(Z_lsgms) * epsilon
Y_piece = Y_piece.astype(int)
print(timer() - start)
'''We have one model to determine wether a square is empty and another model to determine the piece type on not empty squares
We achieved a precision of 100% on train set and 99.99% on test set'''
from tensorflow.keras.layers import Dense, Input, Conv2D, MaxPooling2D, Flatten
from tensorflow.keras.models import Sequential, Model
model_empty = Sequential()
model_empty.add(Input(shape=(32, 32, 1)))
model_empty.add(Conv2D(filters=5, kernel_size=(3, 3), activation='relu'))
model_empty.add(Conv2D(filters=5, kernel_size=(3, 3), activation='relu'))
model_empty.add(Conv2D(filters=5, kernel_size=(3, 3), activation='relu'))
model_empty.add(MaxPooling2D((2, 2)))
model_empty.add(Flatten())
model_empty.add(Dense(128, activation='relu'))
model_empty.add(Dense(2, activation='softmax'))
adam = tf.keras.optimizers.Adam(learning_rate=0.001)
model_empty.compile(optimizer=adam,
loss='sparse_categorical_crossentropy',
metrics=['accuracy'])
model_piece = Sequential()
model_piece.add(Input(shape=(32, 32, 1)))
model_piece.add(Conv2D(filters=5, kernel_size=(3, 3), activation='relu'))
model_piece.add(Conv2D(filters=5, kernel_size=(3, 3), activation='relu'))
model_piece.add(Conv2D(filters=5, kernel_size=(3, 3), activation='relu'))
model_piece.add(MaxPooling2D((2, 2)))
model_piece.add(Flatten())
H5_Zero2 = ZeroPadding2D(padding=(1,1))(H5_Conv1) H5_Conv2 = Conv2D(512,kernel_size=3,strides=1,activation='relu')(H5_Zero2) H5_Zero3 = ZeroPadding2D(padding=(1,1))(H5_Conv2) H5_Conv3 = Conv2D(512,kernel_size=3,strides=1,activation='relu')(H5_Zero3) H5_Pool = MaxPool2D(pool_size=(2,2),strides=2)(H5_Conv3) #Layer_6 H6_Zero1 = ZeroPadding2D(padding=(1,1))(H5_Pool) H6_Conv1 = Conv2D(512,kernel_size=3,strides=1,activation='relu')(H6_Zero1) H6_Zero2 = ZeroPadding2D(padding=(1,1))(H6_Conv1) H6_Conv2 = Conv2D(512,kernel_size=3,strides=1,activation='relu')(H6_Zero2) H6_Zero3 = ZeroPadding2D(padding=(1,1))(H6_Conv2) H6_Conv3 = Conv2D(512,kernel_size=3,strides=1,activation='relu')(H6_Zero3) # Layer_7 H7_Flat = Flatten()(H6_Conv3) #Layer_8 H8_Full = Dense(4096,activation='relu')(H7_Flat) H8_Drop = Dropout(0.5)(H8_Full) #Layer_9 H8_Full = Dense(1000,activation='relu')(H8_Full) H8_Drop = Dropout(0.5)(H8_Full) #Layer_10 outputs = Dense(10,activation='softmax')(H8_Drop) # model_make model = Model(inputs,outputs) model.summary()
# Here we will be using imagenet weights
resnet = ResNet50(input_shape=IMAGE_SIZE + [3],
weights='imagenet',
include_top=False)
# don't train existing weights
for layer in resnet.layers:
layer.trainable = False
# useful for getting number of output classes
folders = glob('/content/drive/My Drive/Car Model Classifier/Datasets/Train/*')
folders
# our layers - you can add more if you want
x = Flatten()(resnet.output)
prediction = Dense(len(folders), activation='softmax')(x)
# create a model object
model = Model(inputs=resnet.input, outputs=prediction)
# view the structure of the model
model.summary()
# tell the model what cost and optimization method to use
model.compile(loss='categorical_crossentropy',
optimizer='adam',
metrics=['accuracy'])
# Use the Image Data Generator to import the images from the dataset
def __init__(self, args):
# TODO: Define a suitable model, by calling `super().__init__`
# with appropriate inputs and outputs.
#
# Alternatively, if you prefer to use a `tf.keras.Sequential`,
# replace the `Network` parent, call `super().__init__` at the beginning
# of this constructor and add layers using `self.add`.
# TODO: After creating the model, call `self.compile` with appropriate arguments.
super(Network, self).__init__()
num_classes = 10
weight_decay = 1e-4
self.add(
Conv2D(32, (3, 3),
padding='same',
kernel_regularizer=regularizers.l2(weight_decay),
input_shape=(32, 32, 3)))
self.add(Activation('relu'))
self.add(BatchNormalization())
self.add(
Conv2D(32, (3, 3),
padding='same',
kernel_regularizer=regularizers.l2(weight_decay)))
self.add(Activation('relu'))
self.add(BatchNormalization())
self.add(MaxPooling2D(pool_size=(2, 2)))
self.add(Dropout(0.2))
self.add(
Conv2D(64, (3, 3),
padding='same',
kernel_regularizer=regularizers.l2(weight_decay)))
self.add(Activation('relu'))
self.add(BatchNormalization())
self.add(
Conv2D(64, (3, 3),
padding='same',
kernel_regularizer=regularizers.l2(weight_decay)))
self.add(Activation('relu'))
self.add(BatchNormalization())
self.add(MaxPooling2D(pool_size=(2, 2)))
self.add(Dropout(0.3))
self.add(
Conv2D(128, (3, 3),
padding='same',
kernel_regularizer=regularizers.l2(weight_decay)))
self.add(Activation('relu'))
self.add(BatchNormalization())
self.add(
Conv2D(128, (3, 3),
padding='same',
kernel_regularizer=regularizers.l2(weight_decay)))
self.add(Activation('relu'))
self.add(BatchNormalization())
self.add(MaxPooling2D(pool_size=(2, 2)))
self.add(Dropout(0.4))
self.add(Flatten())
self.add(Dense(num_classes, activation='softmax'))
schedule = tf.keras.optimizers.schedules.ExponentialDecay(
initial_learning_rate=0.01,
decay_steps=args.epochs * 45000 / 500,
decay_rate=0.0001 / 0.01)
self.compile(
optimizer=tf.keras.optimizers.Adam(clipnorm=1.0,
clipvalue=0.5,
learning_rate=schedule),
loss=tf.keras.losses.SparseCategoricalCrossentropy(),
metrics=[
tf.keras.metrics.SparseCategoricalAccuracy(name="accuracy")
])
self.tb_callback = tf.keras.callbacks.TensorBoard(args.logdir,
update_freq=1000,
profile_batch=1)
self.tb_callback.on_train_end = lambda *_: None
GAN_noise_size = 128
GAN_output_size = 7
G_input = Input(shape=(GAN_noise_size,))
G = Dense(128, kernel_initializer='glorot_uniform')(G_input)
G = LeakyReLU(alpha=0.2)(G)
G = BatchNormalization()(G)
G = Reshape([8, 8, 2])(G) # default: channel last
G = Conv2DTranspose(32, kernel_size=2, strides=1, padding="same")(G)
G = LeakyReLU(alpha=0.2)(G)
G = BatchNormalization()(G)
G = Conv2DTranspose(16, kernel_size=3, strides=1, padding="same")(G)
G = LeakyReLU(alpha=0.2)(G)
G = BatchNormalization()(G)
G = Flatten()(G)
G_output = Dense(GAN_output_size)(G)
G_output = Activation("tanh")(G_output)
generator = Model(G_input, G_output)
generator.summary()
for batch_size_i in batch_size_i_array:
for i in range(0, 1):
batch_size = int(batch_size_i)
batchsize = int(batch_size_i)
print(' ')
def LSTM_Network(data, string):
tscv = TimeSeriesSplit()
TimeSeriesSplit(max_train_size=None, n_splits=5)
a = []
for train_index, test_index in tscv.split(data.scaled_dataset):
print("TRAIN:", train_index, "TEST:", test_index)
X_train, y_train = data.Nueral_Network(data.scaled_dataset,
data.scaled_dataset[:, -1], 0,
data.train_set, data.timesteps)
X_val, y_val = data.Nueral_Network(data.scaled_dataset,
data.scaled_dataset[:, -1],
data.train_set, data.validation_set,
data.timesteps)
X_test, y_test = data.Nueral_Network(data.scaled_dataset,
data.scaled_dataset[:, -1],
data.validation_set,
data.test_set, data.timesteps)
# Defines the models input shape, the loss fucntion, and the metric used for the error function.
# The 'data' passed into the moudle as an argument calls on the each lots pre-preocessing moudle to
# obtain the training, testing, and validation data sets
input_shape = X_train.shape[-2:]
loss = tf.keras.losses.MeanAbsoluteError()
metric = tf.keras.metrics.MeanAbsolutePercentageError()
# Reshapes the y_test numpy array so it cna be passes into the mean_absolute_percentage_error function
# Reverses the scaler to re-obtain the atcual values of the data
y_test_reshaped = y_test.reshape(-1, 1)
y_test_inv = data.scaler.inverse_transform(y_test_reshaped)
# Sets the amount of test sample to use in each iteration and shuffles the data to prevent over-fitting
batch_size = 64
shuffle_size = 64
val = tf.data.Dataset.from_tensor_slices((X_val, y_val))
val = val.cache().shuffle(shuffle_size).batch(shuffle_size).prefetch(1)
train = tf.data.Dataset.from_tensor_slices((X_train, y_train))
train = train.cache().shuffle(shuffle_size).batch(
shuffle_size).prefetch(1)
# Builds the model. LSTM defines the amount of LSTM cells in the network
# Return sequence defiens wetaher the modle return the final h valeu of the full array of results form each cell
# flatten() reduces the datas dimensions and it gets passed to a Dense layer of 160 nuerons
# Dropout radnomly drops 10% of nuerons to prevent over-fitting
LSTM_Model = tf.keras.models.Sequential([
LSTM(80, input_shape=input_shape, return_sequences=True),
Flatten(),
Dense(160, activation='tanh'),
Dropout(0.1),
Dense(1)
])
optimizer = tf.keras.optimizers.Adam(lr=.0009, amsgrad=True)
LSTM_Model.compile(loss=loss, optimizer=optimizer, metrics=metric)
tf.keras.backend.set_epsilon(1)
Model = LSTM_Model.fit(train, epochs=100, validation_data=val)
# Forecats is a build in keras model that appleis the trianed network to new data
# The forecats sclaer values are then transformed back to real vlaues and passed to the MAPE fucntion
forecast = LSTM_Model.predict(X_test)
LSTM_forecast = data.scaler.inverse_transform(forecast)
MAPE = mean_absolute_percentage_error(y_test_inv, LSTM_forecast)
a.append(np.array(MAPE))
# MAPE and Loss are plotted
plot_model_mape(Model, string)
plot_model_loss(Model, string)
# The modle and the wights are saved as JSON ands h5 files
LSTM_JSON = LSTM_Model.to_json()
with open(
"Project/Saved_Models/Buildings/" + string + "/LSTM/" + string +
"_LSTM.json", "w") as json_file:
json_file.write(LSTM_JSON)
LSTM_Model.save_weights('Project/Saved_Models/Buildings/' + string +
'/LSTM/' + string + '_LSTM.h5')
print('MLP forecast MAPE of hour-ahead electricity demand: {}'.format(a))
return LSTM
learning_rate = 0.0025
t_batch_size = 1500
batch_size = 512
no_epochs = 100 # 200
verbosity = 1
lstm_model = Sequential()
classes = 90
lstm_model.add(LSTM(128,input_shape=(n_steps, n_features), return_sequences=True))
lstm_model.add(LSTM(64))
lstm_model.add(Dropout(0.50))
lstm_model.add(Flatten())
lstm_model.add(Dense(classes, activation='softmax'))
# Compile the model
lstm_model.compile(loss='categorical_crossentropy',
optimizer='RMSProp',
metrics=['accuracy'])
from tensorflow.keras.models import Sequential
from tensorflow.keras.layers import Dense
from tensorflow.keras.utils import plot_model
plot_model(lstm_model, to_file='model_plot.png', show_shapes=True, show_layer_names=True)
"""# Model Summary"""
def VGG16_SEGNET(n_classes,
input_height=224,
input_width=224,
input_depth=3,
vgg_level=-1):
img_input = Input(shape=(input_height, input_width, input_depth))
x = Conv2D(64, (3, 3),
activation='relu',
padding='same',
name='block1_conv1',
data_format='channels_last')(img_input)
x = Conv2D(64, (3, 3),
activation='relu',
padding='same',
name='block1_conv2',
data_format='channels_last')(x)
x = MaxPooling2D((2, 2),
strides=(2, 2),
name='block1_pool',
data_format='channels_last')(x)
f1 = x
# Block 2
x = Conv2D(128, (3, 3),
activation='relu',
padding='same',
name='block2_conv1',
data_format='channels_last')(x)
x = Conv2D(128, (3, 3),
activation='relu',
padding='same',
name='block2_conv2',
data_format='channels_last')(x)
x = MaxPooling2D((2, 2),
strides=(2, 2),
name='block2_pool',
data_format='channels_last')(x)
f2 = x
# Block 3
x = Conv2D(256, (3, 3),
activation='relu',
padding='same',
name='block3_conv1',
data_format='channels_last')(x)
x = Conv2D(256, (3, 3),
activation='relu',
padding='same',
name='block3_conv2',
data_format='channels_last')(x)
x = Conv2D(256, (3, 3),
activation='relu',
padding='same',
name='block3_conv3',
data_format='channels_last')(x)
x = MaxPooling2D((2, 2),
strides=(2, 2),
name='block3_pool',
data_format='channels_last')(x)
f3 = x
# Block 4
x = Conv2D(512, (3, 3),
activation='relu',
padding='same',
name='block4_conv1',
data_format='channels_last')(x)
x = Conv2D(512, (3, 3),
activation='relu',
padding='same',
name='block4_conv2',
data_format='channels_last')(x)
x = Conv2D(512, (3, 3),
activation='relu',
padding='same',
name='block4_conv3',
data_format='channels_last')(x)
x = MaxPooling2D((2, 2),
strides=(2, 2),
name='block4_pool',
data_format='channels_last')(x)
f4 = x
# Block 5
x = Conv2D(512, (3, 3),
activation='relu',
padding='same',
name='block5_conv1',
data_format='channels_last')(x)
x = Conv2D(512, (3, 3),
activation='relu',
padding='same',
name='block5_conv2',
data_format='channels_last')(x)
x = Conv2D(512, (3, 3),
activation='relu',
padding='same',
name='block5_conv3',
data_format='channels_last')(x)
x = MaxPooling2D((2, 2),
strides=(2, 2),
name='block5_pool',
data_format='channels_last')(x)
f5 = x
x = Flatten(name='flatten')(x)
x = Dense(4096, activation='relu', name='fc1')(x)
x = Dense(4096, activation='relu', name='fc2')(x)
x = Dense(1000, activation='softmax', name='predictions')(x)
vgg = Model(img_input, x)
vgg.load_weights(VGG_Weights_path)
levels = [f1, f2, f3, f4, f5]
o = levels[vgg_level]
#o = ( UpSampling2D( (2,2), data_format='channels_last'))(o)
o = (ZeroPadding2D((1, 1), data_format='channels_last'))(o)
o = (Conv2D(512, (3, 3),
activation='relu',
padding='valid',
data_format='channels_last'))(o)
o = (BatchNormalization())(o)
o = (UpSampling2D((2, 2), data_format='channels_last'))(o)
o = (ZeroPadding2D((1, 1), data_format='channels_last'))(o)
o = (Conv2D(512, (3, 3),
activation='relu',
padding='valid',
data_format='channels_last'))(o)
o = (BatchNormalization())(o)
o = (UpSampling2D((2, 2), data_format='channels_last'))(o)
o = (ZeroPadding2D((1, 1), data_format='channels_last'))(o)
o = (Conv2D(256, (3, 3),
activation='relu',
padding='valid',
data_format='channels_last'))(o)
o = (BatchNormalization())(o)
o = (UpSampling2D((2, 2), data_format='channels_last'))(o)
o = (ZeroPadding2D((1, 1), data_format='channels_last'))(o)
o = (Conv2D(128, (3, 3),
activation='relu',
padding='valid',
data_format='channels_last'))(o)
o = (BatchNormalization())(o)
o = (UpSampling2D((2, 2), data_format='channels_last'))(o)
o = (ZeroPadding2D((1, 1), data_format='channels_last'))(o)
o = (Conv2D(64, (3, 3),
activation='relu',
padding='valid',
data_format='channels_last'))(o)
o = (BatchNormalization())(o)
o = Conv2D(n_classes, (3, 3), padding='same',
data_format='channels_last')(o)
#o_shape = Model(img_input , o ).output_shape
#outputHeight = o_shape[2]
#outputWidth = o_shape[3]
#o = (Reshape(( -1 , outputHeight*outputWidth )))(o)
#o = (Permute((2, 1)))(o)
o = (Activation('softmax'))(o)
model = Model(img_input, o)
#model.outputWidth = outputWidth
#model.outputHeight = outputHeight
return model
from tensorflow.keras.callbacks import ModelCheckpoint, EarlyStopping
x_train[0]
vocab_size = len(word_vocab) + 1
EMBEDDING_DIM = 128
HIDDEN_DIM = 100
conv_feature_maps = []
x_input = Input(batch_shape=(None, x_train.shape[1]))
e_layer = Embedding(input_dim=vocab_size, output_dim=EMBEDDING_DIM)(x_input)
e_layer = Dropout(rate=0.5)(e_layer)
for ks in [3, 4, 5]:
r_layer = Conv1D(filters=HIDDEN_DIM,
kernel_size=ks,
padding='valid',
activation='relu')(e_layer)
max_pool = GlobalMaxPooling1D()(r_layer)
flatten = Flatten()(max_pool)
conv_feature_maps.append(flatten)
r_layer = Concatenate()(conv_feature_maps)
r_layer = Dropout(rate=0.5)(r_layer)
y_output = Dense(250, activation='relu')(r_layer)
y_output = Dense(1, activation='sigmoid')(r_layer)
model = Model(x_input, y_output)
model.compile(loss='binary_crossentropy',
optimizer=Adam(learning_rate=0.0005),
metrics=['accuracy'])
model.summary()
# 학습
es = EarlyStopping(monitor='val_accuracy', min_delta=0.0001, patience=2)
cp = ModelCheckpoint(filepath='./',
def hifis_rnn_mlp(cfg,
input_dim,
metrics,
metadata,
output_bias=None,
hparams=None):
'''
Defines a Keras model for HIFIS hybrid recurrent neural network and multilayer perceptron model (i.e. HIFIS-v3)
:param cfg: A dictionary of parameters associated with the model architecture
:param input_dim: The shape of the model input
:param metrics: Metrics to track model's performance
:param metadata: Dict containing prediction horizon, time series feature info
:param output_bias: initial bias applied to output layer
:param hparams: dict of hyperparameters
:return: a Keras model object with the architecture defined in this method
'''
# Set hyperparameters
if hparams is None:
nodes_dense0 = cfg['DENSE']['DENSE0']
nodes_dense1 = cfg['DENSE']['DENSE1']
layers = cfg['LAYERS']
dropout = cfg['DROPOUT']
l2_lambda = cfg['L2_LAMBDA']
lr = cfg['LR']
optimizer = Adam(learning_rate=lr)
lstm_units = cfg['LSTM']['UNITS']
else:
nodes_dense0 = hparams['NODES0']
nodes_dense1 = hparams['NODES1']
layers = hparams['LAYERS']
dropout = hparams['DROPOUT']
lr = 10**hparams['LR'] # Random sampling on logarithmic scale
beta_1 = 1 - 10**hparams['BETA_1']
beta_2 = 1 - 10**hparams['BETA_2']
l2_lambda = 10**hparams['L2_LAMBDA']
lstm_units = hparams['LSTM_UNITS']
if hparams['OPTIMIZER'] == 'adam':
optimizer = Adam(learning_rate=lr, beta_1=beta_1, beta_2=beta_2)
elif hparams['OPTIMIZER'] == 'sgd':
optimizer = SGD(learning_rate=lr)
if output_bias is not None:
output_bias = Constant(output_bias)
# Receive input to model and split into 2 tensors containing dynamic and static features respectively
X_input = Input(shape=input_dim)
split_idx = metadata['NUM_TS_FEATS'] * metadata['T_X']
X_dynamic, X_static = split(X_input,
[split_idx, X_input.shape[1] - split_idx],
axis=1)
# Define RNN component of model using LSTM cells. LSTM input shape is [batch_size, timesteps, features]
lstm_input_shape = (metadata['T_X'], metadata['NUM_TS_FEATS'])
X_dynamic = Reshape(lstm_input_shape)(X_dynamic)
X_dynamic = LSTM(lstm_units, activation='tanh',
return_sequences=True)(X_dynamic)
X_dynamic = Flatten()(X_dynamic)
# Define MLP component of model
X = concatenate([X_dynamic,
X_static]) # Combine output of LSTM with static features
X = Dense(nodes_dense0,
input_shape=input_dim,
activation='relu',
kernel_regularizer=l2(l2_lambda),
bias_regularizer=l2(l2_lambda),
name="dense0")(X)
X = Dropout(dropout, name='dropout0')(X)
for i in range(1, layers):
X = Dense(nodes_dense1,
activation='relu',
kernel_regularizer=l2(l2_lambda),
bias_regularizer=l2(l2_lambda),
name='dense%d' % i)(X)
X = Dropout(dropout, name='dropout%d' % i)(X)
Y = Dense(1,
activation='sigmoid',
name="output",
bias_initializer=output_bias)(X)
# Define model with inputs and outputs
model = Model(inputs=X_input,
outputs=Y,
name='HIFIS-rnn-mlp_' + str(metadata['N_WEEKS']) + '-weeks')
# Set model loss function, optimizer, metrics.
model.compile(loss=f1_loss(4.5), optimizer=optimizer, metrics=metrics)
# Print summary of model and return model object
if hparams is None:
model.summary()
return model
print("Shape of Training dataset: ", train_images.shape)
print("Length of Training dataset: ", len(train_labels))
print("Training labels:", train_labels)
print("Shape of Test dataset: ", test_images.shape)
print("Length of Test dataset: ", len(test_labels))
os.system("pause")
# Building the model
print("Setting up the layers: ")
model = Sequential()
model.add(Convolution2D(32, 3, 3, activation='relu', input_shape=(1,28,28), data_format='channels_first'))
model.add(Convolution2D(32, 3, 3, activation='relu'))
model.add(MaxPooling2D(pool_size=(2,2)))
model.add(Dropout(0.25))
model.add(Flatten())
model.add(Dense(128, activation='relu'))
model.add(Dropout(0.5))
model.add(Dense(10, activation='softmax'))
# Model reconstruction from JSON file
with open('trained models/model_architecture.json', 'r') as f:
model = model_from_json(f.read())
# Load weights into the new model
model.load_weights('trained models/model_weights.h5')
print("Compiling the model: ")
model.compile(optimizer=tf.train.AdamOptimizer(),
loss='categorical_crossentropy',
metrics=['accuracy'])
X, y = get_batch(train.iloc[batch_start:batch_end], start=seq_start)
yield X, y
from tensorflow.keras.models import Sequential
from tensorflow.keras.losses import mean_absolute_percentage_error
from tensorflow.keras.layers import Conv1D, MaxPool1D, Dense, Activation, GlobalMaxPool1D, Flatten
number_of_features = 29
max_length = 100
model = Sequential([Conv1D(filters=16, kernel_size=5, input_shape=(100, 29), activation='relu', padding='causal'),
MaxPool1D(pool_size=5),
Conv1D(filters=16, kernel_size=5, activation='relu', padding='causal'),
MaxPool1D(5),
Flatten(),
Dense(units=1)])
model.compile(optimizer='adam', loss=mean_absolute_percentage_error)
from sklearn.model_selection import train_test_split
batch_size = 128
train_df, val_df = train_test_split(train, test_size=0.1)
train_gen = generate_batches(train_df, batch_size=batch_size)
val_gen = generate_batches(val_df, batch_size=batch_size)
n_train_samples = train_df.shape[0]
n_val_samples = val_df.shape[0]
a, b = next(train_gen)
def get_adm_model(learning_rate, l2_reg, price_min, price_max, price_interval,
embedd_size):
price_step = int(
math.floor((price_max - price_min + K.epsilon()) / price_interval))
total_len = 0
input_tensors = []
# Input Embedding Layers
embedding_tensors = []
# composing embedding layers
for column_name, count_value, dimension_length in embedding_paras:
total_len += embedd_size # or dimension_length
input_tensor = Input(name='{}_index'.format(column_name),
shape=(1, ),
dtype='int64')
embedding_tensor = Embedding(
count_value,
embedd_size, # or dimension_length
input_length=1,
embeddings_initializer='glorot_normal',
name='{}_embedding'.format(column_name))(input_tensor)
embedding_tensor = Flatten()(embedding_tensor)
embedding_tensors.append(embedding_tensor)
input_tensors.append(input_tensor)
# Input Numerical Layers
numerical_tensors = []
numerical_embedd_tensors = []
for column_name in numerical_paras:
total_len += 1
input_tensor = Input(name='{}'.format(column_name),
shape=(1, ),
dtype='float32')
numerical_tensors.append(input_tensor)
input_tensors.append(input_tensor)
input_embedd_tensor = Lambda(lambda x: tf.tile(x, [1, embedd_size]))(
input_tensor)
numerical_embedd_tensors.append(input_embedd_tensor)
feature_num = len(input_tensors) # 44
# features (embedding + numeric)
## 1-order
x_o1_tensor = Concatenate()(embedding_tensors + numerical_tensors)
## 2-order
x_o2_tensor = Lambda(lambda x: tf.stack(x, axis=1))(
embedding_tensors +
numerical_embedd_tensors) # (None, feature_num, dim)
x_o2_tensor = InteractingLayer(att_embedding_size=8,
head_num=2)(x_o2_tensor)
x_o2_tensor = Flatten()(x_o2_tensor)
## high-order
x_oh_tensor = Dense(
total_len / 2,
activation='relu',
kernel_regularizer=regularizers.l2(l2_reg))(x_o1_tensor)
x_oh_tensor = Dense(
total_len / 4,
activation='relu',
kernel_regularizer=regularizers.l2(l2_reg))(x_oh_tensor)
# output layer
output_tensor = Concatenate(axis=1)(
[x_o1_tensor, x_o2_tensor, x_oh_tensor])
output_tensor = Dense(
price_step, kernel_regularizer=regularizers.l2(l2_reg))(output_tensor)
output_tensor = Softmax(name='mixture_price_3')(output_tensor)
model = Model(inputs=input_tensors, outputs=[output_tensor])
adam = optimizers.Adam(lr=learning_rate)
optimizer = hvd.DistributedOptimizer(adam)
model.compile(loss=neighborhood_likelihood_loss,
optimizer=optimizer,
experimental_run_tf_function=False)
return model
target_size = (256, 256)
batch_size = 32
epochs = 90
input_shape = target_size + (3, )
classifier = Sequential()
classifier.add(Conv2D(32, (3, 3), input_shape=(256, 256, 3),
activation='relu'))
classifier.add(MaxPooling2D(pool_size=(2, 2)))
classifier.add(Conv2D(64, (3, 3), activation='relu'))
classifier.add(MaxPooling2D(pool_size=(2, 2)))
classifier.add(Conv2D(128, (3, 3), activation='relu'))
classifier.add(MaxPooling2D(pool_size=(2, 2)))
classifier.add(Conv2D(256, (3, 3), activation='relu'))
classifier.add(MaxPooling2D(pool_size=(2, 2)))
classifier.add(Flatten())
classifier.add(Dropout(0.5))
classifier.add(Dense(units=512, activation='relu'))
classifier.add(Dropout(0.5))
classifier.add(Dense(units=512, activation='relu'))
classifier.add(Dropout(0.5))
classifier.add(Dense(units=6, activation='softmax'))
classifier.compile(optimizer='adam',
loss='categorical_crossentropy',
metrics=['accuracy'])
#model summary
classifier.summary()
#image preprocesing and fitting
train_datagen = ImageDataGenerator(rescale=1. / 255,
# Reason is a bug in TF2 where not the learning_phase_tensor is extractable
# in order to put as an input to keras models
# https://stackoverflow.com/questions/58987264/how-to-get-learning-phase-in-tensorflow-2-eager
# https://stackoverflow.com/questions/58279628/what-is-the-difference-between-tf-keras-and-tf-python-keras?noredirect=1&lq=1
# https://github.com/tensorflow/tensorflow/issues/34508
# Define how many past observations we want the control agent to process each step
# for this case, we assume to pass only the single most recent observation
window_length = 1
# Define an artificial neural network to be used within the agent as actor
# (using keras sequential)
actor = Sequential()
# The network's input fits the observation space of the env
actor.add(
Flatten(input_shape=(window_length, ) + env.observation_space.shape))
actor.add(Dense(16, activation='relu'))
actor.add(Dense(16, activation='relu'))
# The network output fits the action space of the env
actor.add(Dense(nb_actions, activation='sigmoid'))
print(actor.summary())
# Define another artificial neural network to be used within the agent as critic
# note that this network has two inputs
action_input = Input(shape=(nb_actions, ), name='action_input')
observation_input = Input(shape=(window_length, ) +
env.observation_space.shape,
name='observation_input')
# (using keras functional API)
flattened_observation = Flatten()(observation_input)
x = Concatenate()([action_input, flattened_observation])
def build_ATN(architecture=1, input_shape=[28, 28, 1], num_classes=10):
if architecture == 0:
image = Input(shape=input_shape)
target = Input(shape=(num_classes, ))
#target_int = Lambda(lambda x:K.argmax(x,axis=-1))(target)
x1 = Flatten()(image)
#x2 = Embedding(10,20,input_length=1)(target_int)
#x2 = Lambda(lambda x: K.squeeze(x, -2))(x2)
x = Concatenate(axis=-1)([x1, target])
x = Dense(2048,
kernel_initializer='glorot_normal',
bias_initializer='zeros')(x)
x = BatchNormalization()(x)
x = Activation('relu')(x)
x = Dense(np.prod(input_shape),
activation='sigmoid',
bias_initializer='zeros')(x)
x = Reshape(input_shape)(x)
cnn = Model(inputs=[image, target], outputs=x)
elif architecture == 1:
image = Input(shape=input_shape)
target = Input(shape=(num_classes, ))
x1 = Flatten()(image)
x = Concatenate(axis=-1)([x1, target])
x = Dense(1024,
kernel_initializer='glorot_normal',
bias_initializer='zeros')(x)
x = BatchNormalization()(x)
x = Activation('relu')(x)
x = Dense(1024,
kernel_initializer='glorot_normal',
bias_initializer='zeros')(x)
x = BatchNormalization()(x)
x = Activation('relu')(x)
x = Dense(np.prod(input_shape),
activation='sigmoid',
bias_initializer='zeros')(x)
x = Reshape(input_shape)(x)
cnn = Model(inputs=[image, target], outputs=x)
elif architecture == -1:
cnn = Sequential()
cnn.add(Flatten(input_shape=input_shape))
cnn.add(
Dense(2048,
activation='relu',
kernel_initializer='glorot_normal',
bias_initializer='zeros'))
cnn.add(Dropout(0.25))
cnn.add(
Dense(np.prod(input_shape),
activation='sigmoid',
kernel_initializer='glorot_normal',
bias_initializer='zeros'))
cnn.add(Reshape(input_shape))
elif architecture == -2:
cnn = Sequential()
cnn.add(
Conv2D(
64,
kernel_size=(3, 3),
activation='relu',
kernel_initializer='glorot_normal',
bias_initializer='zeros', #Constant(-0.5),
kernel_regularizer=l2(0.005),
input_shape=input_shape,
padding='same'))
cnn.add(
Conv2D(128,
kernel_size=(3, 3),
activation='relu',
kernel_initializer='glorot_normal',
bias_initializer='zeros',
kernel_regularizer=l2(0.005),
padding='same'))
cnn.add(MaxPooling2D(pool_size=(2, 2)))
cnn.add(
Conv2D(256,
kernel_size=(3, 3),
activation='relu',
kernel_initializer='glorot_normal',
bias_initializer='zeros',
kernel_regularizer=l2(0.005),
padding='same'))
cnn.add(MaxPooling2D(pool_size=(2, 2)))
cnn.add(Flatten())
cnn.add(
Dense(2048,
activation='relu',
kernel_initializer='glorot_normal',
bias_initializer='zeros',
kernel_regularizer=l2(0.05)))
cnn.add(Dropout(0.25))
cnn.add(
Dense(np.prod(input_shape),
activation='sigmoid',
kernel_initializer='glorot_normal',
bias_initializer='zeros'))
cnn.add(Reshape(input_shape))
elif architecture == 2:
cnn = Sequential()
cnn.add(
Conv2D(256,
kernel_size=(3, 3),
activation='relu',
input_shape=input_shape,
padding='same',
use_bias=True,
kernel_initializer='glorot_normal',
bias_initializer='zeros'))
cnn.add(MaxPooling2D(pool_size=(2, 2)))
cnn.add(Dropout(0.5))
cnn.add(
Conv2D(512,
kernel_size=(3, 3),
activation='relu',
padding='same',
use_bias=True,
kernel_initializer='glorot_normal',
bias_initializer='zeros'))
#cnn.add(MaxPooling2D(pool_size=(2, 2)))
#cnn.add(Dropout(0.5))
#cnn.add(Conv2D(512, kernel_size=(3, 3),activation='relu',padding='same',
# use_bias=True, kernel_initializer='glorot_normal', bias_initializer='zeros'))
#cnn.add(UpSampling2D(data_format='channels_last'))
#cnn.add(Dropout(0.5))
#cnn.add(Conv2DTranspose(256, kernel_size=(3,3), padding='same', activation='relu',
# use_bias=True, kernel_initializer='glorot_normal', bias_initializer='zeros'))
cnn.add(UpSampling2D(data_format='channels_last'))
cnn.add(Dropout(0.5))
cnn.add(
Conv2DTranspose(256,
kernel_size=(3, 3),
padding='same',
activation='relu',
use_bias=True,
kernel_initializer='glorot_normal',
bias_initializer='zeros'))
cnn.add(Dropout(0.5))
cnn.add(
Conv2DTranspose(1,
kernel_size=(3, 3),
padding='same',
activation='sigmoid',
use_bias=True,
kernel_initializer='glorot_normal',
bias_initializer='zeros'))
return cnn
import tensorflow as tf
import numpy as np
from tensorflow.keras.models import Sequential
from tensorflow.keras.layers import Flatten, Dense
from tensorflow.keras.optimizers import SGD
x_data = np.array([1, 2, 3, 4, 5, 6])
t_data = np.array([3, 4, 5, 6, 7, 8])
# x_data + 2 = t_data(정답)
model = Sequential()
model.add(Flatten(input_shape=(1, ))) # 입력층
model.add(Dense(1, activation='linear')) # 출력층
# model.add(Dense(1, input_shape=(1,), activation='linear'))
model.compile(optimizer=SGD(learning_rate=1e-2),
loss='mse') # Stochastic Gradient Descent, mse 평균제곱오차
model.summary()
hist = model.fit(x_data, t_data, epochs=1000)
result = model.predict(np.array([-3.1, 3.0, 3.5, 15.0, 20.1]))
print(result)
