def yolov3_net(cfg_file, num_classes):
"""
Build model yolo from config file
:param cfg_file:
:param num_classes:
:return:
"""
blocks = parse_cfg(cfg_file)
model_size = int(blocks[0]['width']), int(blocks[0]['height']), int(
blocks[0]['channels'])
outputs = {}
output_filters = []
filters = []
out_pred = []
scale = 0
inputs = input_image = Input(shape=model_size)
inputs = inputs / 255.0
for i, block in enumerate(blocks[1:]):
if block['type'] == 'convolutional':
activation = block['activation']
filters = int(block['filters'])
kernel_size = int(block['size'])
strides = int(block['stride'])
if strides > 1:
# downsampling is performed, so we need to adjust the padding
inputs = ZeroPadding2D(((1, 0), (1, 0)))(inputs)
inputs = Conv2D(
filters,
kernel_size,
strides=strides,
padding='valid' if strides > 1 else 'same',
name='conv_' + str(i),
use_bias=False if "batch_normalize" in block else True)(inputs)
if "batch_normalize" in block:
inputs = BatchNormalization(name="batch_normalize_" +
str(i))(inputs)
if activation == 'leaky':
inputs = LeakyReLU(alpha=0.1, name="leaky_" + str(i))(inputs)
elif block['type'] == 'upsample':
stride = int(block['stride'])
inputs = UpSampling2D(stride)(inputs)
elif block['type'] == 'route':
block['layers'] = block['layers'].split(',')
start = int(block['layers'][0])
if len(block['layers']) > 1:
end = int(block['layers'][1]) - i
filters = output_filters[i + start] + output_filters[
end] # Index negatif :end - index
inputs = tf.concat([outputs[i + start], outputs[i + end]],
axis=-1)
else:
filters = output_filters[i + start]
inputs = outputs[i + start]
elif block['type'] == 'shortcut':
from_ = int(block['from'])
inputs = outputs[i - 1] + outputs[i + from_]
elif block['type'] == 'yolo':
mask = block['mask'].split(',')
mask = [int(x) for x in mask]
anchors = block['anchors'].split(',')
anchors = [int(x) for x in anchors]
anchors = [(anchors[i], anchors[i + 1])
for i in range(0, len(anchors), 2)]
anchors = [anchors[i] for i in mask]
n_anchors = len(anchors)
out_shape = inputs.get_shape().as_list()
inputs = tf.reshape(
inputs,
[-1, n_anchors * out_shape[1] * out_shape[2], 5 + num_classes])
box_centers = inputs[:, :, 0:2]
box_shapes = inputs[:, :, 2:4]
confidence = inputs[:, :, 4:5]
classes = inputs[:, :, 5:5 + num_classes]
# Refile bounding boxes
box_centers = tf.sigmoid(box_centers)
confidence = tf.sigmoid(confidence)
classes = tf.sigmoid(classes)
anchors = tf.tile(anchors, [out_shape[1] * out_shape[2], 1])
box_shapes = tf.exp(box_shapes) * tf.cast(anchors,
dtype=tf.float32)
x = tf.range(out_shape[1], dtype=tf.float32)
y = tf.range(out_shape[2], dtype=tf.float32)
cx, cy = tf.meshgrid(x, y)
cx = tf.reshape(cx, (-1, 1))
cy = tf.reshape(cy, (-1, 1))
cxy = tf.concat([cx, cy], axis=-1)
cxy = tf.tile(cxy, [1, n_anchors])
cxy = tf.reshape(cxy, [1, -1, 2])
strides = (input_image.get_shape().as_list()[1] // out_shape[1],
input_image.get_shape().as_list()[1] // out_shape[2])
box_centers = (box_centers + cxy) * strides
prediction = tf.concat(
[box_centers, box_shapes, confidence, classes], axis=-1)
if scale:
out_pred = tf.concat([out_pred, prediction], axis=1)
scale += 1
else:
out_pred = prediction
scale = 1
outputs[i] = inputs
output_filters.append(filters)
model = Model(input_image, out_pred)
# model.summary()
print(model.outputs)
return model
mixed_precision.set_policy(policy) datagen = ImageDataGenerator(rescale=1. / 255, validation_split=0.2, horizontal_flip=True) train_csv = pd.read_csv(r"/content/train.csv") train_csv["label"] = train_csv["label"].astype(str) base_model = tf.keras.applications.ResNet50(weights='imagenet', input_shape=(512, 512, 3), include_top=True) base_model.trainable = True model = tf.keras.Sequential([ tf.keras.layers.Input((512, 512, 3)), tf.keras.layers.BatchNormalization(renorm=True), base_model, BatchNormalization(), tf.keras.layers.LeakyReLU(), tf.keras.layers.Flatten(), tf.keras.layers.Dense(512), BatchNormalization(), tf.keras.layers.LeakyReLU(), tf.keras.layers.Dense(256), BatchNormalization(), tf.keras.layers.LeakyReLU(), tf.keras.layers.Dense(128), BatchNormalization(), tf.keras.layers.LeakyReLU(),
def lrelu_bn(inputs):
lrelu = LeakyReLU()(inputs)
bn = BatchNormalization()(lrelu)
return bn
def predict_model(input_size, epochs=200, lr=1e-1):
inputs = Input(shape=input_size, name='inputs')
# Embedding input
wday_input = Input(shape=(1,), name='wday')
month_input = Input(shape=(1,), name='month')
year_input = Input(shape=(1,), name='year')
mday_input = Input(shape=(1,), name='mday')
quarter_input = Input(shape=(1,), name='quarter')
event_name_1_input = Input(shape=(1,), name='event_name_1')
event_type_1_input = Input(shape=(1,), name='event_type_1')
event_name_2_input = Input(shape=(1,), name='event_name_2')
event_type_2_input = Input(shape=(1,), name='event_type_2')
item_id_input = Input(shape=(1,), name='item_id')
dept_id_input = Input(shape=(1,), name='dept_id')
store_id_input = Input(shape=(1,), name='store_id')
cat_id_input = Input(shape=(1,), name='cat_id')
state_id_input = Input(shape=(1,), name='state_id')
snap_CA_input = Input(shape=(1,), name='snap_CA')
snap_TX_input = Input(shape=(1,), name='snap_TX')
snap_WI_input = Input(shape=(1,), name='snap_WI')
wday_emb = Flatten()(Embedding(7, 1)(wday_input))
month_emb = Flatten()(Embedding(12, 2)(month_input))
year_emb = Flatten()(Embedding(6, 1)(year_input))
mday_emb = Flatten()(Embedding(31, 2)(mday_input))
quarter_emb = Flatten()(Embedding(4, 1)(quarter_input))
event_name_1_emb = Flatten()(Embedding(31, 2)(event_name_1_input))
event_type_1_emb = Flatten()(Embedding(5, 1)(event_type_1_input))
event_name_2_emb = Flatten()(Embedding(5, 1)(event_name_2_input))
event_type_2_emb = Flatten()(Embedding(5, 1)(event_type_2_input))
item_id_emb = Flatten()(Embedding(3049, 4)(item_id_input))
dept_id_emb = Flatten()(Embedding(7, 1)(dept_id_input))
store_id_emb = Flatten()(Embedding(10, 1)(store_id_input))
cat_id_emb = Flatten()(Embedding(6, 1)(cat_id_input))
state_id_emb = Flatten()(Embedding(3, 1)(state_id_input))
input_data = Concatenate(-1)([inputs, wday_emb, month_emb, month_emb, year_emb, mday_emb, \
quarter_emb, event_name_1_emb, event_type_1_emb, event_name_2_emb, \
event_type_2_emb, item_id_emb, dept_id_emb, store_id_emb, cat_id_emb, \
state_id_emb])
# x = Dense(1024, activation='relu')(x)
# x = BatchNormalization()(x)
x = Dense(512, activation='relu')(input_data)
x = BatchNormalization()(x)
x = Dropout(0.3)(x)
x = Dense(256, activation='relu')(x)
x = BatchNormalization()(x)
x = Dropout(0.3)(x)
x = Dense(128, activation='relu')(x)
x_deep = Dense(64, activation='relu')(x)
x_deep = BatchNormalization()(x_deep)
x_deep = Dropout(0.3)(x_deep)
# x_deep = Dense(128, activation='relu')(x_deep)
# x_deep = BatchNormalization()(x_deep)
# x_deep = Dropout(0.3)(x_deep)
x_deep = Dense(input_data.shape[1], activation='relu')(x_deep)
# x = Concatenate(-1)([inputs, x])
# x_res = Dense(64, activation='relu')(x)
# x_res = BatchNormalization()(x_res)
# # x_deep = Dropout(0.3)(x_res)
# x_res = Dense(128, activation='relu')(x_res)
# x_res = BatchNormalization()(x_res)
# # x_res = Dropout(0.3)(x_res)
# x_res = Dense(256, activation='relu')(x_res)
# x = Concatenate(-1)([x_deep, x_res])
x = input_data + x_deep
x = Dense(32, activation='relu')(x)
x = BatchNormalization()(x)
x_deep = Dropout(0.3)(x_deep)
x = Dense(16, activation='relu')(x)
outputs = Dense(1, activation='relu')(x)
# outputs = resnet_v2(x)
# optimizer = Adam(lr=lr)#Adam(lr=lr)
input_dic = {
'inputs': inputs, 'wday': wday_input, 'month': month_input, 'year': year_input,
'mday': mday_input, 'quarter': quarter_input, 'event_name_1': event_name_1_input,
'event_type_1': event_type_1_input, 'event_name_2': event_name_2_input,
'event_type_2': event_type_2_input, 'item_id': item_id_input, 'dept_id': dept_id_input,
'store_id': store_id_input, 'cat_id': cat_id_input, 'state_id': state_id_input,
}
model = Model(input_dic, outputs)#, name='predict_model')
return model
def Conv_BN_ReLU(planes, kernel_size, strides=(1, 1, 1), padding='same', use_bias=False):
return Sequential([
Conv3D(planes, kernel_size, strides=strides, padding=padding, use_bias=use_bias),
BatchNormalization(),
ReLU()
])
def _create_se_resnet(classes, img_input, include_top, initial_conv_filters,
filters, depth, width, bottleneck, weight_decay,
pooling):
"""Creates a SE ResNet model with specified parameters
Args:
initial_conv_filters: number of features for the initial convolution
include_top: Flag to include the last dense layer
filters: number of filters per block, defined as a list.
filters = [64, 128, 256, 512
depth: number or layers in the each block, defined as a list.
ResNet-50 = [3, 4, 6, 3]
ResNet-101 = [3, 6, 23, 3]
ResNet-152 = [3, 8, 36, 3]
width: width multiplier for network (for Wide ResNet)
bottleneck: adds a bottleneck conv to reduce computation
weight_decay: weight_decay (l2 norm)
pooling: Optional pooling mode for feature extraction
when `include_top` is `False`.
- `None` means that the output of the model will be
the 4D tensor output of the
last convolutional layer.
- `avg` means that global average pooling
will be applied to the output of the
last convolutional layer, and thus
the output of the model will be a 2D tensor.
- `max` means that global max pooling will
be applied.
Returns: a Keras Model
"""
channel_axis = 1 if K.image_data_format() == 'channels_first' else -1
N = list(depth)
# block 1 (initial conv block)
x = Conv2D(initial_conv_filters, (7, 7),
padding='same',
use_bias=False,
strides=(2, 2),
kernel_initializer='he_normal',
kernel_regularizer=l2(weight_decay))(img_input)
x = MaxPooling2D((3, 3), strides=(2, 2), padding='same')(x)
# block 2 (projection block)
for i in range(N[0]):
if bottleneck:
x = _resnet_bottleneck_block(x, filters[0], width)
else:
x = _resnet_block(x, filters[0], width)
# block 3 - N
for k in range(1, len(N)):
if bottleneck:
x = _resnet_bottleneck_block(x, filters[k], width, strides=(2, 2))
else:
x = _resnet_block(x, filters[k], width, strides=(2, 2))
for i in range(N[k] - 1):
if bottleneck:
x = _resnet_bottleneck_block(x, filters[k], width)
else:
x = _resnet_block(x, filters[k], width)
x = BatchNormalization(axis=channel_axis)(x)
x = Activation('relu')(x)
if include_top:
x = GlobalAveragePooling2D()(x)
x = Dense(classes,
use_bias=False,
kernel_regularizer=l2(weight_decay),
activation='softmax')(x)
else:
if pooling == 'avg':
x = GlobalAveragePooling2D()(x)
elif pooling == 'max':
x = GlobalMaxPooling2D()(x)
return x
def build_model_hpconfig(args):
#parsing and assigning hyperparameter variables from argparse
conv1_filters=int(args.conv1_filters)
conv2_filters=int(args.conv2_filters)
conv3_filters=int(args.conv3_filters)
window_size=int(args.window_size)
kernel_regularizer = args.kernel_regularizer
conv_dropout=float(args.conv2d_dropout)
pool_size = int(args.pool_size)
conv2d_activation=args.conv2d_activation
conv2d_dropout=float(args.conv2d_dropout)
recurrent_layer1 = int(args.recurrent_layer1)
recurrent_layer2 = int(args.recurrent_layer2)
recurrent_dropout = float(args.recurrent_dropout)
after_recurrent_dropout = float(args.after_recurrent_dropout)
recurrent_recurrent_dropout = float(args.recurrent_recurrent_dropout)
optimizer=args.optimizer
learning_rate = float(args.learning_rate)
bidirection = args.bidirection
recurrent_layer = args.recurrent_layer
dense_dropout = float(args.dense_dropout)
dense_1 = int(args.dense_1)
dense_2 = int(args.dense_2)
dense_3 = int(args.dense_3)
dense_4 = int(args.dense_4)
#main input is the length of the amino acid in the protein sequence (700,)
main_input = Input(shape=(700,), dtype='float32', name='main_input')
#Embedding Layer used as input to the neural network
embed = Embedding(output_dim=21, input_dim=21, input_length=700)(main_input)
#secondary input is the protein profile features
auxiliary_input = Input(shape=(700,21), name='aux_input')
#concatenate input layers
concat = Concatenate(axis=-1)([embed, auxiliary_input])
conv_layer1 = Convolution1D(conv1_filters, window_size, kernel_regularizer = "l2", padding='same')(concat)
batch_norm = BatchNormalization()(conv_layer1)
conv2D_act = activations.relu(batch_norm)
conv_dropout = Dropout(conv_dropout)(conv2D_act)
# ave_pool_1 = AveragePooling1D(3, 1, padding='same')(conv_dropout)
max_pool_1D_1 = MaxPooling1D(pool_size=pool_size, strides=1, padding='same')(conv_dropout)
conv_layer2 = Convolution1D(conv2_filters, window_size, padding='same')(concat)
batch_norm = BatchNormalization()(conv_layer2)
conv2D_act = activations.relu(batch_norm)
conv_dropout = Dropout(conv_dropout)(conv2D_act)
# ave_pool_2 = AveragePooling1D(3, 1, padding='same')(conv_dropout)
max_pool_1D_2 = MaxPooling1D(pool_size=pool_size, strides=1, padding='same')(conv_dropout)
conv_layer3 = Convolution1D(conv3_filters, window_size,kernel_regularizer = "l2", padding='same')(concat)
batch_norm = BatchNormalization()(conv_layer3)
conv2D_act = activations.relu(batch_norm)
conv_dropout = Dropout(conv_dropout)(conv2D_act)
max_pool_1D_3 = MaxPooling1D(pool_size=pool_size, strides=1, padding='same')(conv_dropout)
#concat pooling layers
conv_features = Concatenate(axis=-1)([max_pool_1D_1, max_pool_1D_2, max_pool_1D_3])
######## Recurrent Layers ########
if (recurrent_layer == 'lstm'):
if (bidirection):
#Creating Bidirectional LSTM layers
lstm_f1 = Bidirectional(LSTM(recurrent_layer1,return_sequences=True,activation = 'tanh', recurrent_activation='sigmoid',dropout=recurrent_dropout, recurrent_dropout=recurrent_recurrent_dropout))(conv_features)
lstm_f2 = Bidirectional(LSTM(recurrent_layer2, return_sequences=True,activation = 'tanh',recurrent_activation='sigmoid',dropout=recurrent_dropout,recurrent_dropout=recurrent_recurrent_dropout))(lstm_f1)
#concatenate LSTM with convolutional layers
concat_features = Concatenate(axis=-1)([lstm_f1, lstm_f2, conv2_features])
concat_features = Dropout(after_recurrent_dropout)(concat_features)
else:
#Creating unidirectional LSTM Layers
lstm_f1 = LSTM(recurrent_layer1,return_sequences=True,activation = 'tanh', recurrent_activation='sigmoid',dropout=recurrent_dropout,recurrent_dropout=recurrent_recurrent_dropout)(conv_features)
lstm_f2 = LSTM(recurrent_layer2, return_sequences=True,activation = 'tanh',recurrent_activation='sigmoid',dropout=recurrent_dropout,recurrent_dropout=recurrent_recurrent_dropout)(lstm_f1)
#concatenate LSTM with convolutional layers
concat_features = Concatenate(axis=-1)([lstm_f1, lstm_f2, conv_features])
concat_features = Dropout(after_recurrent_dropout)(concat_features)
elif (recurrent_layer == 'gru'):
if (bidirection):
#Creating Bidirectional GRU layers
gru_f1 = Bidirectional(GRU(recurrent_layer1,return_sequences=True,activation = 'tanh', recurrent_activation='sigmoid',dropout=recurrent_dropout,recurrent_dropout=recurrent_recurrent_dropout))(conv_features)
gru_f2 = Bidirectional(GRU(recurrent_layer2, return_sequences=True,activation = 'tanh',recurrent_activation='sigmoid',dropout=recurrent_dropout,recurrent_dropout=recurrent_recurrent_dropout))(gru_f1)
#concatenate LSTM with convolutional layers
concat_features = Concatenate(axis=-1)([gru_f1, gru_f2, conv_features])
concat_features = Dropout(after_recurrent_dropout)(concat_features)
else:
#Creating unidirectional GRU Layers
gru_f1 = GRU(recurrent_layer1,return_sequences=True,activation = 'tanh', recurrent_activation='sigmoid',dropout=recurrent_dropout,recurrent_dropout=recurrent_recurrent_dropout)(conv_features)
gru_f2 = GRU(recurrent_layer1, return_sequences=True,activation = 'tanh',recurrent_activation='sigmoid',dropout=recurrent_dropout,recurrent_dropout=recurrent_recurrent_dropout)(gru_f1)
#concatenate LSTM with convolutional layers
concat_features = Concatenate(axis=-1)([gru_f1, gru_f2, conv_features])
concat_features = Dropout(after_recurrent_dropout)(concat_features)
else:
print('Only LSTM and GRU recurrent layers are used in this model')
return
#Dense Fully-Connected DNN layers
# concat_features = Flatten()(concat_features)
fc_dense1 = Dense(dense_1, activation='relu')(concat_features)
fc_dense1_dropout = Dropout(dense_dropout)(fc_dense1)
fc_dense2 = Dense(dense_2, activation='relu')(fc_dense1_dropout)
fc_dense2_dropout = Dropout(dense_dropout)(fc_dense2)
fc_dense3 = Dense(dense_3, activation='relu')(fc_dense2_dropout)
fc_dense3_dropout = Dropout(dense_dropout)(fc_dense3)
#Final Output layer with 8 nodes for the 8 output classifications
# main_output = Dense(8, activation='softmax', name='main_output')(concat_features)
main_output = Dense(8, activation='softmax', name='main_output')(fc_dense3_dropout)
#create model from inputs and outputs
model = Model(inputs=[main_input, auxiliary_input], outputs=[main_output])
#Set optimizer to be used with the model, default is Adam
if optimizer == 'adam':
optimizer = Adam(lr=learning_rate, name='adam')
elif optimizer == 'sgd':
optimizer = SGD(lr=0.01, momentum=0.0, nestero=False, name='SGD')
elif optimizer == 'rmsprop':
optimizer = RMSprop(learning_rate=learning_rate, centered = True, name='RMSprop')
elif optimizer == 'adagrad':
optimizer = Adagrad(learning_rate = learning_rate, name='Adagrad')
elif optimizer == 'adamax':
optimizer = Adamax(learning_rate=learning_rate, name='Adamax')
else:
optimizer = 'adam'
optimizer = Adam(lr=learning_rate, name='adam')
#Nadam & Ftrl optimizers
#use Adam optimizer
#optimizer = Adam(lr=0.003)
#Adam is fast, but tends to over-fit
#SGD is low but gives great results, sometimes RMSProp works best, SWA can easily improve quality, AdaTune
#compile model using optimizer and the cateogorical crossentropy loss function
model.compile(optimizer = optimizer, loss={'main_output': 'categorical_crossentropy'}, metrics=['accuracy', MeanSquaredError(), FalseNegatives(), FalsePositives(), TrueNegatives(), TruePositives(), MeanAbsoluteError(), Recall(), Precision()])
#get summary of model including its layers and num parameters
model.summary()
#set early stopping and checkpoints for model
earlyStopping = EarlyStopping(monitor='val_loss', patience=5, verbose=1, mode='min')
checkpoint_path = BUCKET_PATH + "/checkpoints/" + str(datetime.date(datetime.now())) +\
'_' + str((datetime.now().strftime('%H:%M'))) + ".h5"
checkpointer = ModelCheckpoint(filepath=checkpoint_path,verbose=1,save_best_only=True, monitor='val_acc', mode='max')
return model
def __init_model__(self):
max_transitions = np.min([
image_utils.n_downsample(self.train_generator.height),
image_utils.n_downsample(self.train_generator.width),
])
n_transitions = self.n_transitions
if isinstance(n_transitions, (int, np.integer)):
if n_transitions == 0:
raise ValueError("n_transitions cannot equal zero")
if n_transitions < 0:
n_transitions += 1
n_transitions = max_transitions - np.abs(n_transitions)
self.n_transitions = n_transitions
elif 0 < n_transitions <= max_transitions:
self.n_transitions = n_transitions
else:
raise ValueError("n_transitions must be in range {0} "
"< n_transitions <= "
"{1}".format(-max_transitions + 1,
max_transitions))
else:
raise TypeError("n_transitions must be integer in range "
"{0} < n_transitions <= "
"{1}".format(-max_transitions + 1,
max_transitions))
if self.train_generator.downsample_factor < 2:
raise ValueError(
"StackedDenseNet is only compatible with `downsample_factor` >= 2."
"Adjust the TrainingGenerator or choose a different model.")
if n_transitions <= self.train_generator.downsample_factor:
raise ValueError(
"`n_transitions` <= `downsample_factor`. Increase `n_transitions` or decrease `downsample_factor`."
" If `n_transitions` is -1 (the default), check that your image resolutions can be repeatedly downsampled (are divisible by 2 repeatedly)."
)
if self.pretrained:
if self.input_shape[-1] is 1:
inputs = Concatenate()([self.inputs] * 3)
input_shape = self.input_shape[:-1] + (3, )
else:
inputs = self.inputs
input_shape = self.input_shape
normalized = ImageNetPreprocess("densenet121")(inputs)
front_outputs = ImageNetFrontEnd(
input_shape=input_shape,
n_downsample=self.train_generator.downsample_factor,
compression_factor=self.compression_factor,
)(normalized)
else:
normalized = ImageNormalization()(self.inputs)
front_outputs = FrontEnd(
growth_rate=self.growth_rate,
n_downsample=self.train_generator.downsample_factor,
compression_factor=self.compression_factor,
bottleneck_factor=self.bottleneck_factor,
)(normalized)
n_downsample = self.n_transitions - self.train_generator.downsample_factor
outputs = front_outputs
model_outputs = OutputChannels(self.train_generator.n_output_channels,
name="output_0")(outputs)
model_outputs_list = [model_outputs]
outputs.append(BatchNormalization()(model_outputs))
for idx in range(self.n_stacks):
outputs = DenseNet(
growth_rate=self.growth_rate,
n_downsample=self.n_transitions -
self.train_generator.downsample_factor,
downsample_factor=self.train_generator.downsample_factor,
compression_factor=self.compression_factor,
bottleneck_factor=self.bottleneck_factor,
)(outputs)
outputs.append(Concatenate()(front_outputs))
outputs.append(BatchNormalization()(model_outputs))
model_outputs = OutputChannels(
self.train_generator.n_output_channels,
name="output_" + str(idx + 1))(outputs)
model_outputs_list.append(model_outputs)
self.train_model = Model(self.inputs,
model_outputs_list,
name=self.__class__.__name__)
def build_net(optim):
"""
This is a Deep Convolutional Neural Network (DCNN). For generalization purpose I used dropouts in regular intervals.
I used `ELU` as the activation because it avoids dying relu problem but also performed well as compared to LeakyRelu
at-least in this case. `he_normal` kernel initializer is used as it suits ELU. BatchNormalization is also used for
better results.
"""
net = Sequential(name='DCNN')
net.add(
Conv2D(filters=64,
kernel_size=(5, 5),
input_shape=(img_width, img_height, img_depth),
activation='elu',
padding='same',
kernel_initializer='he_normal',
name='conv2d_1'))
net.add(BatchNormalization(name='batchnorm_1'))
net.add(
Conv2D(filters=64,
kernel_size=(5, 5),
activation='elu',
padding='same',
kernel_initializer='he_normal',
name='conv2d_2'))
net.add(BatchNormalization(name='batchnorm_2'))
net.add(MaxPooling2D(pool_size=(2, 2), name='maxpool2d_1'))
net.add(Dropout(0.4, name='dropout_1'))
net.add(
Conv2D(filters=128,
kernel_size=(3, 3),
activation='elu',
padding='same',
kernel_initializer='he_normal',
name='conv2d_3'))
net.add(BatchNormalization(name='batchnorm_3'))
net.add(
Conv2D(filters=128,
kernel_size=(3, 3),
activation='elu',
padding='same',
kernel_initializer='he_normal',
name='conv2d_4'))
net.add(BatchNormalization(name='batchnorm_4'))
net.add(MaxPooling2D(pool_size=(2, 2), name='maxpool2d_2'))
net.add(Dropout(0.4, name='dropout_2'))
net.add(
Conv2D(filters=256,
kernel_size=(3, 3),
activation='elu',
padding='same',
kernel_initializer='he_normal',
name='conv2d_5'))
net.add(BatchNormalization(name='batchnorm_5'))
net.add(
Conv2D(filters=256,
kernel_size=(3, 3),
activation='elu',
padding='same',
kernel_initializer='he_normal',
name='conv2d_6'))
net.add(BatchNormalization(name='batchnorm_6'))
net.add(MaxPooling2D(pool_size=(2, 2), name='maxpool2d_3'))
net.add(Dropout(0.5, name='dropout_3'))
net.add(Flatten(name='flatten'))
net.add(
Dense(128,
activation='elu',
kernel_initializer='he_normal',
name='dense_1'))
net.add(BatchNormalization(name='batchnorm_7'))
net.add(Dropout(0.6, name='dropout_4'))
net.add(Dense(num_classes, activation='softmax', name='out_layer'))
net.compile(loss='categorical_crossentropy',
optimizer=optim,
metrics=['accuracy'])
net.summary()
return net
def deep_logistic_keras(X,
nodes_per_layer=[50, 20, 1],
loss_type='binary_crossentropy',
optimizer=k.optimizers.Adam(lr=0.001),
metrics_list=['accuracy'],
do_batch_norm=True,
do_dropout=None,
activation_type='relu',
initializer=k.initializers.RandomNormal(mean=0.0,
stddev=0.05)):
"""Build a deep NN classifier in Keras.
Args:
X (np.ndarray): Array with shape [n_examples, n_features]
containing data examples.
nodes_per_layer (list of int): Number of nodes in each layer.
loss_type (str): The loss function to minimize.
optimizer (Keras optimizer): Keras optimizer with which to compile model.
metrics_list (list of str): Metrics to calculate during training.
do_batch_norm (bool): Whether to perform batch normalization after each
hidden layer.
do_dropout (float/None): Dropout fraction to use.
activation_type (str): Type of activation function to apply to hidden
layer outputs.
initializer (Keras initializer): Keras initializer to use for dense layers.
Returns:
model (Keras model): Compiled Keras model.
"""
# Initialize model
model = Sequential()
N_layers = len(nodes_per_layer)
for ilayer in range(N_layers):
nodes = nodes_per_layer[ilayer]
last_layer = ilayer == (N_layers - 1)
# Handles each kind of layer (input, output, hidden) appropriately
if ilayer == 0:
model.add(
Dense(nodes,
input_dim=X.shape[1],
kernel_initializer=initializer))
elif ilayer == N_layers - 1:
assert nodes == 1, 'Output layer should have 1 node.'
model.add(
Dense(nodes,
activation='sigmoid',
kernel_initializer=initializer))
else:
model.add(Dense(nodes, kernel_initializer=initializer))
# Optional batch norm and dropout
if not last_layer:
if do_dropout is not None:
assert do_dropout < 1.0 and do_dropout >= 0.0, \
'Dropout must be fraction between 0.0 and 1.0.'
model.add(Dropout(do_dropout))
if do_batch_norm:
model.add(BatchNormalization())
# Add activation Function
model.add(Activation(activation_type))
# Compile
model.compile(loss=loss_type, optimizer=optimizer, metrics=metrics_list)
return model
def _bn_relu(input):
"""Helper to build a BN -> relu block
"""
norm = BatchNormalization(axis=CHANNEL_AXIS)(input)
return Activation("relu")(norm)
#Estimator.add(Conv2D(Nfilters,3, activation=NAF))
#Estimator.add(Conv2D(Nfilters,3, activation=NAF))
Estimator.add(Flatten())
Estimator.add(
Dense(64,
kernel_regularizer=regularizers.l2(0.001),
kernel_initializer='normal',
activation=NAF))
Estimator.add(
BatchNormalization(axis=-1,
momentum=0.99,
epsilon=0.001,
center=True,
scale=True,
beta_initializer='zeros',
gamma_initializer='ones',
moving_mean_initializer='zeros',
moving_variance_initializer='ones',
beta_regularizer=None,
gamma_regularizer=None,
beta_constraint=None,
gamma_constraint=None))
Estimator.add(
Dense(32,
kernel_regularizer=regularizers.l2(0.001),
kernel_initializer='normal',
activation=NAF))
Estimator.add(
Dense(16,
kernel_regularizer=regularizers.l2(0.001),
kernel_initializer='normal',
def wide_residual_network(x, is_training, params):
assert 'depth' in params, 'depth must in params'
assert 'width' in params, 'width must in params'
assert 'drop_prob' in params, 'drop_prob must in params'
assert 'out_units' in params, 'out_units must in params'
depth = params['depth']
width = params['width']
drop_prob = params['drop_prob']
# if use_conv, a 1*1 conv2d will be used for downsampling between groups
if 'use_conv' in params:
use_conv = params['use_conv']
else:
use_conv = False
assert (depth - 4) % 6 == 0
num_residual_units = (depth - 4) // 6
nb_filters = [x * width for x in [16, 32, 64, 128]]
prefix = 'main/'
x = Conv2D(16, 3, strides=(1, 1), padding='same', name=prefix + 'conv')(x)
in_nb_filters = 16
for i in range(0, num_residual_units):
x = residual_block(x,
is_training=is_training,
in_nb_filters=in_nb_filters,
nb_filters=nb_filters[0],
block_id=1,
stride=1,
drop_prob=drop_prob,
use_conv=False)
in_nb_filters = nb_filters[0]
for i in range(0, num_residual_units):
stride = 2 if i == 0 else 1
x = residual_block(x,
is_training=is_training,
in_nb_filters=in_nb_filters,
nb_filters=nb_filters[1],
block_id=2,
stride=stride,
drop_prob=drop_prob,
use_conv=use_conv)
in_nb_filters = nb_filters[1]
for i in range(0, num_residual_units):
stride = 2 if i == 0 else 1
x = residual_block(x,
is_training=is_training,
in_nb_filters=in_nb_filters,
nb_filters=nb_filters[2],
block_id=3,
stride=stride,
drop_prob=drop_prob,
use_conv=use_conv)
in_nb_filters = nb_filters[2]
for i in range(0, num_residual_units):
stride = 2 if i == 0 else 1
x = residual_block(x,
is_training=is_training,
in_nb_filters=in_nb_filters,
nb_filters=nb_filters[3],
block_id=4,
stride=stride,
drop_prob=drop_prob,
use_conv=use_conv)
in_nb_filters = nb_filters[3]
# x = Conv2D(512, 3, strides=(2, 2), padding='same', name=prefix+'conv_1')(x)
x = BatchNormalization(name=prefix + 'bn')(x, training=is_training)
x = tf.nn.relu(x, name=prefix + 'relu')
x = AveragePooling2D(pool_size=(8, 8),
strides=(1, 1),
padding='valid',
name=prefix + 'pool')(x)
x = Flatten(name=prefix + 'flatten')(x)
x = Dense(params['out_units'], name=prefix + 'fc')(x)
x = BatchNormalization(name=prefix + 'bn_1')(x, training=is_training)
out = tf.math.l2_normalize(x)
return out
def build_generator(self, number_of_filters_per_layer=(128, 64), kernel_size=4):
model = Sequential()
# To build the generator, we create the reverse encoder model
# and simply build the reverse model
encoder = None
if self.dimensionality == 2:
autoencoder, encoder = create_convolutional_autoencoder_model_2d(
input_image_size=self.input_image_size,
number_of_filters_per_layer=(*(number_of_filters_per_layer[::-1]), self.latent_dimension),
convolution_kernel_size=(5, 5),
deconvolution_kernel_size=(5, 5))
else:
autoencoder, encoder = create_convolutional_autoencoder_model_3d(
input_image_size=self.input_image_size,
number_of_filters_per_layer=(*(number_of_filters_per_layer[::-1]), self.latent_dimension),
convolution_kernel_size=(5, 5, 5),
deconvolution_kernel_size=(5, 5, 5))
encoder_layers = encoder.layers
penultimate_layer = encoder_layers[len(encoder_layers) - 2]
model.add(Dense(units=penultimate_layer.output_shape[1],
input_dim=self.latent_dimension,
activation="relu"))
conv_layer = encoder_layers[len(encoder_layers) - 3]
resampled_size = conv_layer.output_shape[1:(self.dimensionality + 2)]
model.add(Reshape(resampled_size))
count = 0
for i in range(len(encoder_layers) - 3, 1, -1):
conv_layer = encoder_layers[i]
resampled_size = conv_layer.output_shape[1:(self.dimensionality + 1)]
if self.dimensionality == 2:
model.add(ResampleTensorLayer2D(shape=resampled_size,
interpolation_type='linear'))
model.add(Conv2D(filters=number_of_filters_per_layer[count],
kernel_size=kernel_size,
padding='same'))
else:
model.add(ResampleTensorLayer3D(shape=resampled_size,
interpolation_type='linear'))
model.add(Conv3D(filters=number_of_filters_per_layer[count],
kernel_size=kernel_size,
padding='same'))
model.add(BatchNormalization(momentum=0.8))
model.add(Activation(activation='relu'))
count += 1
number_of_channels = self.input_image_size[-1]
spatial_dimensions = self.input_image_size[:self.dimensionality]
if self.dimensionality == 2:
model.add(ResampleTensorLayer2D(shape=spatial_dimensions,
interpolation_type='linear'))
model.add(Conv2D(filters=number_of_channels,
kernel_size=kernel_size,
padding='same'))
else:
model.add(ResampleTensorLayer3D(shape=spatial_dimensions,
interpolation_type='linear'))
model.add(Conv3D(filters=number_of_channels,
kernel_size=kernel_size,
padding='same'))
model.add(Activation(activation="tanh"))
noise = Input(shape=(self.latent_dimension,))
image = model(noise)
generator = Model(inputs=noise, outputs=image)
return(generator)
def Conv2d_BN(x, nb_filter, kernel_size, strides = (1,1), padding = 'same'):
x = Conv2D(nb_filter,kernel_size, padding = padding, strides = strides, activation = 'relu')(x)
x = BatchNormalization(axis = 3)(x)
return x
def train_VGG19(xdim,
ydim,
classes,
trainGen,
valGen,
steps,
NUM_EPOCHS,
bs,
save=False,
name="Default"):
print("[" + name + "] training w/ generator...")
# Seed
SEED = 50
np.random.seed(SEED)
tf.random.set_seed(SEED)
opt = optm.Adam(lr=0.001,
beta_1=0.9,
beta_2=0.999,
epsilon=10E-8,
decay=0.001,
amsgrad=False)
model = applications.VGG19(weights="imagenet",
include_top=False,
input_shape=(xdim, ydim, 3))
#Adding custom Layers
x = model.output
x = Flatten()(x)
x = Dense(512,
use_bias=False,
kernel_initializer=initializers.he_normal(seed=SEED))(x)
x = BatchNormalization()(x)
x = relu(x)
x = Dense(512,
use_bias=False,
kernel_initializer=initializers.he_normal(seed=SEED))(x)
x = BatchNormalization()(x)
x = relu(x)
predictions = Dense(classes, activation="softmax")(x)
# creating the final model
model_final = Model(inputs=model.input, outputs=predictions)
print(model_final.summary())
checkpointer = ModelCheckpoint(
filepath=name + '_best_weights.h5',
verbose=1,
monitor='val_loss',
mode='auto',
save_best_only=True) #save at each epoch if the validation decreased
tbr = TensorBoard(log_dir='./logs',
histogram_freq=0,
write_graph=True,
write_images=True,
embeddings_freq=0,
embeddings_layer_names=None,
embeddings_metadata=None,
embeddings_data=None,
update_freq='epoch')
# compile the model
model_final.compile(loss="categorical_crossentropy",
optimizer=opt,
metrics=["accuracy"])
H = model_final.fit_generator(trainGen,
steps_per_epoch=steps,
validation_data=valGen,
validation_steps=steps,
epochs=NUM_EPOCHS,
use_multiprocessing=MP,
verbose=1) #,
#callbacks=[tbr])
if (save == True):
print("\nSaving model: " + name)
model_final.save_weights(name + '_modelWeight.h5')
model_final.save(name + '_fullModel.h5')
with open(name + '_architecture.json', 'w') as f:
f.write(model_final.to_json())
with open(name + '_hist', 'wb') as file_pi:
pickle.dump(H.history, file_pi)
print('\nModel saved!\n')
else:
print('\nModel not saved!\n')
return H, model_final
def __init__(
self,
inputs,
training = True,
ksize = 5,
n_layers = 12,
channels_interval = 24,
logging = True,
):
conv_activation_layer = _get_conv_activation_layer({})
kernel_initializer = he_uniform(seed = 50)
conv1d_factory = partial(
Conv1D,
strides = (2),
padding = 'same',
kernel_initializer = kernel_initializer,
)
def resnet_block(input_tensor, filter_size):
res = conv1d_factory(
filter_size, (1), strides = (1), use_bias = False
)(input_tensor)
conv1 = conv1d_factory(filter_size, (5), strides = (1))(
input_tensor
)
batch1 = BatchNormalization(axis = -1)(conv1, training = training)
rel1 = conv_activation_layer(batch1)
conv2 = conv1d_factory(filter_size, (5), strides = (1))(rel1)
batch2 = BatchNormalization(axis = -1)(conv2, training = training)
resconnection = Add()([res, batch2])
rel2 = conv_activation_layer(resconnection)
return rel2
self.n_layers = n_layers
self.channels_interval = channels_interval
out_channels = [
i * self.channels_interval for i in range(1, self.n_layers + 1)
]
self.middle = tf.keras.Sequential()
self.middle.add(
tf.keras.layers.Conv1D(
self.n_layers * self.channels_interval,
kernel_size = 15,
strides = 1,
padding = 'SAME',
dilation_rate = 1,
)
)
self.middle.add(BatchNormalization(axis = -1))
self.middle.add(LeakyReLU(0.2))
decoder_out_channels_list = out_channels[::-1]
self.decoder = []
for i in range(self.n_layers):
self.decoder.append(
UpSamplingLayer(channel_out = decoder_out_channels_list[i])
)
self.out = tf.keras.Sequential()
self.out.add(
tf.keras.layers.Conv1D(
1,
kernel_size = 1,
strides = 1,
padding = 'SAME',
dilation_rate = 1,
)
)
self.out.add(Activation('tanh'))
tmp = []
o = inputs
for i in range(self.n_layers):
o = resnet_block(o, out_channels[i])
tmp.append(o)
o = o[:, ::2]
if logging:
print(o)
o = self.middle(o, training = training)
if logging:
print(o)
for i in range(self.n_layers):
o = tf.image.resize(
o, [tf.shape(o)[0], tf.shape(o)[1] * 2], method = 'nearest'
)
o = tf.concat([o, tmp[self.n_layers - i - 1]], axis = 2)
o = self.decoder[i](o, training = training)
if logging:
print(o)
if logging:
print(o, inputs)
o = tf.concat([o, inputs], axis = 2)
o = self.out(o, training = training)
self.logits = o
def __init__(self, input_shape, mr1_input_shape, mr2_input_shape):
with tf.variable_scope("U-Net"):
self.kernel_size = (5, 5) # (5,5)
self.stride = (2, 2)
self.leakiness = 0.2
self.dropout_rate = 0.5
# stride for mr1
self.t_mr1_stride = (2, 1)
self.f_mr1_stride = (1, 2)
# stride for mr2
self.f_mr2_stride = (1, 8)
#mr1: t 512 to 256
self.mr1_conv1 = Conv2D(4,
self.kernel_size,
self.t_mr1_stride,
input_shape=mr1_input_shape,
padding='same')
self.mr1_Bnorm1 = BatchNormalization()
#mr2:
self.mr2_conv1 = Conv2D(8,
self.kernel_size,
self.f_mr2_stride,
input_shape=mr2_input_shape,
padding='same')
self.mr2_Bnorm1 = BatchNormalization()
# endcoder
self.conv1 = Conv2D(4,
self.kernel_size,
self.f_mr1_stride,
input_shape=input_shape,
padding='same')
self.Bnorm1 = BatchNormalization()
self.conv2 = Conv2D(8,
self.kernel_size,
self.stride,
padding='same')
self.Bnorm2 = BatchNormalization()
self.conv3 = Conv2D(32,
self.kernel_size,
self.stride,
padding='same')
self.Bnorm3 = BatchNormalization()
# decoder
self.deconv1 = Conv2DTranspose(16,
self.kernel_size,
self.stride,
padding='same')
self.deBnorm1 = BatchNormalization()
self.Dropout1 = Dropout(rate=self.dropout_rate)
self.deconv2 = Conv2DTranspose(8,
self.kernel_size,
self.stride,
padding='same')
self.deBnorm2 = BatchNormalization()
self.deconv3 = Conv2DTranspose(1,
self.kernel_size,
self.f_mr1_stride,
padding='same')
self.deBnorm3 = BatchNormalization()
patience=10)
'''LR_reduction = tf.keras.callbacks.ReduceLROnPlateau(monitor='val_loss',
factor=0.1,
patience=10,
mode='auto',
cooldown=0,
min_lr=0
)'''
# In[40]:
#Multi-layred ANN
model = tf.keras.models.Sequential()
model.add(BatchNormalization(input_shape=(5000, ), axis=1))
#model.add(Flatten())
model.add(Dense(500, activation='relu'))
model.add(Dropout(0.5))
model.add(Dense(200, activation='relu'))
model.add(Dropout(0.5))
model.add(Dense(100, activation='relu'))
model.add(Dropout(0.4))
inputShapeRGB = (128, 128, 3)
inputRGB = Input(shape = inputShapeRGB)
chanDim = -1
regress = False
filters = (16, 32, 64)
for (i, f) in enumerate(filters):
print("i: {} f: {}".format(i, f))
if (i == 0):
x = inputRGB
x = Conv2D(f, (3, 3), padding = "same")(x)
x = Activation("relu")(x)
x = BatchNormalization(axis = chanDim)(x) # normalize each batch by both mean and variance reference
x = MaxPooling2D(pool_size = (2, 2))(x)
x = Flatten()(x)
x = Dense(16)(x)
x = Activation("relu")(x)
x = BatchNormalization(axis = chanDim)(x)
x = Dropout(0.5)(x) # helps prevent overfitting by randomly setting a fraction 0.5 of input units to 0
x = Dense(4)(x)
x = Activation("relu")(x)
if (regress):
x = Dense(1, activation = "linear")(x)
rgbModel = Model(inputRGB, x)
print(rgbModel.summary())
y_test_std = (y_test - np.min(y_train)) / (np.max(y_train) - np.min(y_train))
#-------------------------------------------------------------------------------
# Creating convolutional Model
#-------------------------------------------------------------------------------
model = Sequential()
model.add(
Conv2D(filters=64,
kernel_size=(3, 3),
padding='same',
input_shape=(4, 4, 1)))
#model.add(ReLU())
model.add(LeakyReLU(alpha=0.1))
model.add(BatchNormalization(momentum=0.8))
model.add(Dropout(0.1))
model.add(AveragePooling2D(pool_size=(2, 2), padding='same'))
model.add(Conv2D(filters=128, kernel_size=(2, 2), padding='same'))
#model.add(ReLU())
model.add(LeakyReLU(alpha=0.1))
model.add(BatchNormalization(momentum=0.8))
model.add(Dropout(0.1))
model.add(AveragePooling2D(pool_size=(2, 2), padding='same'))
model.add(Conv2D(filters=512, kernel_size=(2, 2), padding='same'))
#model.add(ReLU())
model.add(LeakyReLU(alpha=0.1))
model.add(BatchNormalization(momentum=0.8))
model.add(Dropout(0.1))
numLabels = len(np.unique(trainY))
trainY = to_categorical(trainY, numLabels)
testY = to_categorical(testY, numLabels)
# account for skew in the labeled data
classTotals = trainY.sum(axis=0)
classWeight = classTotals.max() / classTotals
model = Sequential()
inputShape = (32, 32, 3)
chanDim = -1
classes = numLabels
# CONV => RELU => BN => POOL
model.add(Conv2D(8, (5, 5), padding="same", input_shape=inputShape))
model.add(Activation("relu"))
model.add(BatchNormalization(axis=chanDim))
model.add(MaxPooling2D(pool_size=(2, 2)))
# first set of (CONV => RELU => CONV => RELU) * 2 => POOL
model.add(Conv2D(16, (3, 3), padding="same"))
model.add(Activation("relu"))
model.add(BatchNormalization(axis=chanDim))
model.add(Conv2D(16, (3, 3), padding="same"))
model.add(Activation("relu"))
model.add(BatchNormalization(axis=chanDim))
model.add(MaxPooling2D(pool_size=(2, 2)))
# second set of (CONV => RELU => CONV => RELU) * 2 => POOL
model.add(Conv2D(32, (3, 3), padding="same"))
model.add(Activation("relu"))
model.add(BatchNormalization(axis=chanDim))
model.add(Conv2D(32, (3, 3), padding="same"))
model.add(Activation("relu"))
def _small_conv_block_(self,
_input_,
filters: int,
kernel_size: Union[int, tuple] = (3, 3),
strides: Union[tuple, int] = (1, 1),
padding: str = 'same',
position: str = 'non_first_block'):
'''
Defining a small 2_consecutive_conv blocks
Params:
:filters: number of filters in current blocks
:kernel_size: size of the kernel in conv_layer
:stride: stride of conv_kernel
:padding: default padding for conv_layer
:position: position of these 2 conv_blocks with respect to the Net
Return:
Output of the 2 conv_blocks
'''
#Depend on the position
if (position == 'very_first_block'):
#Very first block of all Resnet
_input_ = self._conv_batchnorm_dropout_(_input_,
filters=64,
kernel_size=(7, 7),
strides=(2, 2),
padding='same')
_input_ = Activation('relu')(_input_)
_input_ = MaxPooling2D(pool_size=(3, 3),
strides=(2, 2),
padding="same")(_input_)
#Just for the second conv_block of every Resnet, strides = (1,1)
stride_first_layer = strides
elif (position == 'first_block'):
#For every first conv_block of larger conv_chain
stride_first_layer = (2, 2)
elif (position == 'non_first_block'):
#Else
stride_first_layer = strides
input_shape = _input_.shape
#A module of 2 conv_blocks
if (self.mode == '2in1'):
output = self._conv_batchnorm_dropout_(_input_,
filters=filters,
strides=stride_first_layer)
output = Activation('relu')(output)
output_shape = output.shape
output = self._conv_batchnorm_dropout_(output,
filters=filters,
strides=strides)
elif (self.mode == '3in1'):
pass
return
#Check to see what kind of skip connection is used
if (input_shape[1] == output_shape[1]
and input_shape[-1] == output_shape[-1]):
#if(input_shape == output_shape): Don't know why this doesn't work
shortcut = _input_
else:
shortcut = Conv2D(filters,
kernel_size=(1, 1),
strides=(2, 2),
padding='same',
kernel_initializer='he_normal')(_input_)
shortcut = BatchNormalization()(shortcut)
shortcut = Dropout(self.dropout_rate)(shortcut)
output = Add()([output, shortcut]) #Shortcut is merged
output = Activation('relu')(output)
return output
def __init__(self):
super(FullRanet, self).__init__()
# Define Classification Threshold
self.threshold = 0.7
# Define the layers here
self.small_input = tf.keras.layers.AveragePooling2D(pool_size=(4, 4))
self.med_input = tf.keras.layers.AveragePooling2D(pool_size=(2, 2))
# The first conv2d layer in (small, med and large) models
self.conv_in1 = Conv2D(filters=64,
kernel_size=(3, 3),
padding='same',
activation=None)
self.conv_in2 = Conv2D(filters=64,
kernel_size=(3, 3),
padding='same',
activation=None)
self.conv_in3 = Conv2D(filters=64,
kernel_size=(3, 3),
padding='same',
activation=None)
# Remaining conv2d layers
self.small_conv2 = Conv2D(filters=64,
kernel_size=(3, 3),
padding='same',
activation=None)
self.med_conv2 = Conv2D(filters=64,
kernel_size=(3, 3),
padding='same',
activation=None)
self.med_conv3 = Conv2D(filters=64,
kernel_size=(3, 3),
padding='same',
activation=None)
self.med_conv4 = Conv2D(filters=64,
kernel_size=(3, 3),
padding='same',
activation=None)
self.large_conv2 = Conv2D(filters=64,
kernel_size=(3, 3),
padding='same',
activation=None)
self.large_conv3 = Conv2D(filters=64,
kernel_size=(3, 3),
padding='same',
activation=None)
self.large_conv4 = Conv2D(filters=64,
kernel_size=(3, 3),
padding='same',
activation=None)
self.large_conv5 = Conv2D(filters=64,
kernel_size=(3, 3),
padding='same',
activation=None)
self.large_conv6 = Conv2D(filters=64,
kernel_size=(3, 3),
padding='same',
activation=None)
# Batch normalization and relu layers
self.bn1 = BatchNormalization()
self.relu1 = ReLU()
self.bn2 = BatchNormalization()
self.relu2 = ReLU()
self.bn3 = BatchNormalization()
self.relu3 = ReLU()
self.bn4 = BatchNormalization()
self.relu4 = ReLU()
self.bn5 = BatchNormalization()
self.relu5 = ReLU()
self.bn6 = BatchNormalization()
self.relu6 = ReLU()
self.bn7 = BatchNormalization()
self.relu7 = ReLU()
self.bn8 = BatchNormalization()
self.relu8 = ReLU()
self.bn9 = BatchNormalization()
self.relu9 = ReLU()
self.bn10 = BatchNormalization()
self.relu10 = ReLU()
self.bn11 = BatchNormalization()
self.relu11 = ReLU()
self.bn12 = BatchNormalization()
self.relu12 = ReLU()
# Classification Conv2d layers
self.class_small_conv1 = Conv2D(filters=128,
kernel_size=3,
padding='same',
strides=2,
activation='relu')
self.class_small_conv2 = Conv2D(filters=128,
kernel_size=3,
padding='same',
strides=2,
activation='relu')
self.class_med_conv1 = Conv2D(filters=128,
kernel_size=3,
padding='same',
strides=2,
activation='relu')
self.class_med_conv2 = Conv2D(filters=128,
kernel_size=3,
padding='same',
strides=2,
activation='relu')
self.class_large_conv1 = Conv2D(filters=128,
kernel_size=3,
padding='same',
strides=2,
activation='relu')
self.class_large_conv2 = Conv2D(filters=128,
kernel_size=3,
padding='same',
strides=2,
activation='relu')
# reduction layers
self.conv_red1 = Conv2D(filters=64,
kernel_size=1,
padding='same',
activation=None)
self.conv_red2 = Conv2D(filters=64,
kernel_size=1,
padding='same',
activation=None)
self.conv_red3 = Conv2D(filters=64,
kernel_size=1,
padding='same',
activation=None)
self.conv_red4 = Conv2D(filters=64,
kernel_size=1,
padding='same',
activation=None)
self.conv_red5 = Conv2D(filters=64,
kernel_size=1,
padding='same',
activation=None)
self.conv_red6 = Conv2D(filters=64,
kernel_size=1,
padding='same',
activation=None)
# Flatten, dropout and dense layers
self.flatten1 = Flatten()
self.flatten2 = Flatten()
self.flatten3 = Flatten()
self.dropout1 = Dropout(0.2)
self.dropout2 = Dropout(0.2)
self.dropout3 = Dropout(0.2)
self.dropout4 = Dropout(0.2)
self.dropout5 = Dropout(0.2)
self.dropout6 = Dropout(0.2)
self.dense_1 = Dense(units=10, activation='softmax', name="output_1")
self.dense_2 = Dense(units=10, activation='softmax', name="output_2")
self.dense_3 = Dense(units=10, activation='softmax', name="output_3")
# Merge Layers (upsample2D and concatenate)
self.upsamp1 = UpSampling2D(size=(2, 2), interpolation='bilinear')
self.concat1 = Concatenate(axis=-1)
self.upsamp2 = UpSampling2D(size=(2, 2), interpolation='bilinear')
self.concat2 = Concatenate(axis=-1)
self.upsamp3 = UpSampling2D(size=(2, 2), interpolation='bilinear')
self.concat3 = Concatenate(axis=-1)
self.upsamp4 = UpSampling2D(size=(2, 2), interpolation='bilinear')
self.concat4 = Concatenate(axis=-1)
self.upsamp5 = UpSampling2D(size=(2, 2), interpolation='bilinear')
self.concat5 = Concatenate(axis=-1)
self.upsamp6 = UpSampling2D(size=(2, 2), interpolation='bilinear')
self.concat6 = Concatenate(axis=-1)
def mobilenet(input_tensor):
#----------------------------主干特征提取网络开始---------------------------#
# SSD结构,net字典
net = {}
# Block 1
x = input_tensor
# 300,300,3 -> 150,150,64
x = Conv2D(32, (3, 3),
padding='same',
use_bias=False,
strides=(2, 2),
name='conv1')(input_tensor)
x = BatchNormalization(name='conv1_bn')(x)
x = Activation(relu6, name='conv1_relu')(x)
x = _depthwise_conv_block(x, 64, 1, block_id=1)
# 150,150,64 -> 75,75,128
x = _depthwise_conv_block(x, 128, 1, strides=(2, 2), block_id=2)
x = _depthwise_conv_block(x, 128, 1, block_id=3)
# Block 3
# 75,75,128 -> 38,38,256
x = _depthwise_conv_block(x, 256, 1, strides=(2, 2), block_id=4)
x = _depthwise_conv_block(x, 256, 1, block_id=5)
net['conv4_3'] = x
# Block 4
# 38,38,256 -> 19,19,512
x = _depthwise_conv_block(x, 512, 1, strides=(2, 2), block_id=6)
x = _depthwise_conv_block(x, 512, 1, block_id=7)
x = _depthwise_conv_block(x, 512, 1, block_id=8)
x = _depthwise_conv_block(x, 512, 1, block_id=9)
x = _depthwise_conv_block(x, 512, 1, block_id=10)
x = _depthwise_conv_block(x, 512, 1, block_id=11)
# Block 5
# 19,19,512 -> 19,19,1024
x = _depthwise_conv_block(x, 1024, 1, strides=(1, 1), block_id=12)
x = _depthwise_conv_block(x, 1024, 1, block_id=13)
net['fc7'] = x
# x = Dropout(0.5, name='drop7')(x)
# Block 6
# 19,19,512 -> 10,10,512
net['conv6_1'] = Conv2D(256,
kernel_size=(1, 1),
activation='relu',
padding='same',
name='conv6_1')(net['fc7'])
net['conv6_2'] = ZeroPadding2D(padding=((1, 1), (1, 1)),
name='conv6_padding')(net['conv6_1'])
net['conv6_2'] = Conv2D(512,
kernel_size=(3, 3),
strides=(2, 2),
activation='relu',
name='conv6_2')(net['conv6_2'])
# Block 7
# 10,10,512 -> 5,5,256
net['conv7_1'] = Conv2D(128,
kernel_size=(1, 1),
activation='relu',
padding='same',
name='conv7_1')(net['conv6_2'])
net['conv7_2'] = ZeroPadding2D(padding=((1, 1), (1, 1)),
name='conv7_padding')(net['conv7_1'])
net['conv7_2'] = Conv2D(256,
kernel_size=(3, 3),
strides=(2, 2),
activation='relu',
padding='valid',
name='conv7_2')(net['conv7_2'])
# Block 8
# 5,5,256 -> 3,3,256
net['conv8_1'] = Conv2D(128,
kernel_size=(1, 1),
activation='relu',
padding='same',
name='conv8_1')(net['conv7_2'])
net['conv8_2'] = Conv2D(256,
kernel_size=(3, 3),
strides=(1, 1),
activation='relu',
padding='valid',
name='conv8_2')(net['conv8_1'])
# Block 9
# 3,3,256 -> 1,1,256
net['conv9_1'] = Conv2D(128,
kernel_size=(1, 1),
activation='relu',
padding='same',
name='conv9_1')(net['conv8_2'])
net['conv9_2'] = Conv2D(256,
kernel_size=(3, 3),
strides=(1, 1),
activation='relu',
padding='valid',
name='conv9_2')(net['conv9_1'])
#----------------------------主干特征提取网络结束---------------------------#
return net
def build_v2(input_shape, alpha, depth_multiplier, dropout, include_top,
input_tensor, pooling, classes, output_names):
channel_axis = 1 if K.image_data_format() == 'channels_first' else -1
img_input = Input(shape=input_shape)
first_block_filters = make_divisible(32 * alpha, 8)
class_name = output_names
# If input_shape is None, infer shape from input_tensor
if input_shape is None and input_tensor is not None:
try:
backend.is_keras_tensor(input_tensor)
except ValueError:
raise ValueError('input_tensor: ', input_tensor, 'is type: ',
type(input_tensor),
'which is not a valid type')
if input_shape is None and not backend.is_keras_tensor(
input_tensor):
default_size = 224
elif input_shape is None and backend.is_keras_tensor(input_tensor):
if backend.image_data_format() == 'channels_first':
rows = backend.int_shape(input_tensor)[2]
cols = backend.int_shape(input_tensor)[3]
else:
rows = backend.int_shape(input_tensor)[1]
cols = backend.int_shape(input_tensor)[2]
if rows == cols and rows in [96, 128, 160, 192, 224]:
default_size = rows
else:
default_size = 224
# If input_shape is None and no input_tensor
elif input_shape is None:
default_size = 224
# If input_shape is not None, assume default size
else:
if K.image_data_format() == 'channels_first':
rows = input_shape[1]
cols = input_shape[2]
else:
rows = input_shape[0]
cols = input_shape[1]
if rows == cols and rows in [96, 128, 160, 192, 224]:
default_size = rows
else:
default_size = 224
x = ZeroPadding2D(padding=correct_pad(K, img_input, 3),
name='Conv1_pad')(img_input)
x = Conv2D(first_block_filters,
kernel_size=3,
strides=(2, 2),
padding='valid',
use_bias=False,
name='Conv1')(x)
x = BatchNormalization(axis=channel_axis,
epsilon=1e-3,
momentum=0.999,
name='bn_Conv1')(x)
x = Activation('relu', name='Conv1_relu')(x)
x = inverted_res_block(x,
filters=16,
alpha=alpha,
stride=1,
expansion=1,
block_id=0)
x = inverted_res_block(x,
filters=24,
alpha=alpha,
stride=2,
expansion=6,
block_id=1)
x = inverted_res_block(x,
filters=24,
alpha=alpha,
stride=1,
expansion=6,
block_id=2)
x = inverted_res_block(x,
filters=32,
alpha=alpha,
stride=2,
expansion=6,
block_id=3)
x = inverted_res_block(x,
filters=32,
alpha=alpha,
stride=1,
expansion=6,
block_id=4)
x = inverted_res_block(x,
filters=32,
alpha=alpha,
stride=1,
expansion=6,
block_id=5)
x = inverted_res_block(x,
filters=64,
alpha=alpha,
stride=2,
expansion=6,
block_id=6)
x = inverted_res_block(x,
filters=64,
alpha=alpha,
stride=1,
expansion=6,
block_id=7)
x = inverted_res_block(x,
filters=64,
alpha=alpha,
stride=1,
expansion=6,
block_id=8)
x = inverted_res_block(x,
filters=64,
alpha=alpha,
stride=1,
expansion=6,
block_id=9)
x = inverted_res_block(x,
filters=96,
alpha=alpha,
stride=1,
expansion=6,
block_id=10)
x = inverted_res_block(x,
filters=96,
alpha=alpha,
stride=1,
expansion=6,
block_id=11)
x = inverted_res_block(x,
filters=96,
alpha=alpha,
stride=1,
expansion=6,
block_id=12)
x = inverted_res_block(x,
filters=160,
alpha=alpha,
stride=2,
expansion=6,
block_id=13)
x = inverted_res_block(x,
filters=160,
alpha=alpha,
stride=1,
expansion=6,
block_id=14)
x = inverted_res_block(x,
filters=160,
alpha=alpha,
stride=1,
expansion=6,
block_id=15)
x = inverted_res_block(x,
filters=320,
alpha=alpha,
stride=1,
expansion=6,
block_id=16)
# no alpha applied to last conv as stated in the paper:
# if the width multiplier is greater than 1 we
# increase the number of output channels
if alpha > 1.0:
last_block_filters = make_divisible(1280 * alpha, 8)
else:
last_block_filters = 1280
x = Conv2D(last_block_filters,
kernel_size=1,
use_bias=False,
name='Conv_1')(x)
x = BatchNormalization(axis=channel_axis,
epsilon=1e-3,
momentum=0.999,
name='Conv_1_bn')(x)
x = Activation('relu', name='out_relu')(x)
if include_top:
x = GlobalAveragePooling2D()(x)
x = Dense(classes,
activation='softmax',
use_bias=True,
name='Logits')(x)
else:
if pooling == 'avg':
x = GlobalAveragePooling2D()(x)
elif pooling == 'max':
x = GlobalMaxPooling2D()(x)
if input_tensor is not None:
inputs = keras_utils.get_source_inputs(input_tensor)
else:
inputs = img_input
# Create model.
model = Model(inputs, outputs=x)
return model
nb_classes = len(categories) #일반화 x_train = preprocess_input(x_train) x_test = preprocess_input(x_test) resnet101 = ResNet101(include_top=False,weights='imagenet',input_shape=x_train.shape[1:]) resnet101.trainable = False x = resnet101.output x = MaxPooling2D(pool_size=(2,2)) (x) x = Flatten() (x) x = Dense(128, activation= 'relu') (x) x = BatchNormalization() (x) x = Dense(64, activation= 'relu') (x) x = BatchNormalization() (x) x = Dense(10, activation= 'softmax') (x) model = Model(inputs = resnet101.input, outputs = x) model.summary() model.compile(loss='categorical_crossentropy', optimizer=Adam(1e-5), metrics=['acc']) # model_path = '../data/modelcheckpoint/Pproject152.hdf5' # checkpoint = ModelCheckpoint(filepath=model_path , monitor='val_loss', verbose=1, save_best_only=True) # early_stopping = EarlyStopping(monitor='val_loss', patience=10) # # lr = ReduceLROnPlateau(patience=30, factor=0.5,verbose=1) # history = model.fit(x_train, y_train, batch_size=16, epochs=50, validation_data=(x_test, y_test),callbacks=[early_stopping,
def train(batch_size=500, n=50, data=1):
dataset = f"train/data0{data}_train"
version = f"data0{data}_{n}"
checkpoint_path = f'checkpoint_{version}.hdf5'
log_dir = f'logs/{version}'
epochs = 100
img_width = 200
img_height = 60
alphabet = list('ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789')
char_to_int = dict((c, i) for i, c in enumerate(alphabet))
int_to_char = dict((i, c) for i, c in enumerate(alphabet))
df = pd.read_csv(f'{dataset}.csv', delimiter=',')
df['code'] = df['code'].apply(lambda el: list(el))
df[[f'code{i}' for i in range(1, 7)]] = pd.DataFrame(df['code'].to_list(),
index=df.index)
for i in range(1, 7):
df[f'code{i}'] = df[f'code{i}'].apply(
lambda el: to_categorical(char_to_int[el], len(alphabet)))
datagen = ImageDataGenerator(rescale=1. / 255, validation_split=0.2)
train_generator = datagen.flow_from_dataframe(
dataframe=df,
directory=dataset,
subset='training',
x_col="filename",
y_col=[f'code{i}' for i in range(1, 7)],
class_mode="multi_output",
target_size=(img_height, img_width),
batch_size=batch_size)
valid_generator = datagen.flow_from_dataframe(
dataframe=df,
directory=dataset,
subset='validation',
x_col="filename",
y_col=[f'code{i}' for i in range(1, 7)],
class_mode="multi_output",
target_size=(img_height, img_width),
batch_size=batch_size)
input_shape = (img_height, img_width, 3)
main_input = Input(shape=input_shape)
x = main_input
x = Conv2D(filters=64, kernel_size=(3, 3), padding='same')(x)
x = BatchNormalization()(x)
x = Activation(activation='relu')(x)
x = Conv2D(filters=64, kernel_size=(3, 3), padding='same')(x)
x = BatchNormalization()(x)
x = Activation(activation='relu')(x)
x = MaxPooling2D(pool_size=(2, 2), padding='same')(x)
x = Dropout(0.2)(x)
x = Conv2D(filters=128, kernel_size=(3, 3), padding='same')(x)
x = BatchNormalization()(x)
x = Activation(activation='relu')(x)
x = Conv2D(filters=128, kernel_size=(3, 3), padding='same')(x)
x = BatchNormalization()(x)
x = Activation(activation='relu')(x)
x = MaxPooling2D(pool_size=(2, 2), padding='same')(x)
x = Dropout(0.2)(x)
x = Conv2D(filters=256, kernel_size=(3, 3), padding='same')(x)
x = BatchNormalization()(x)
x = Activation(activation='relu')(x)
x = Conv2D(filters=256, kernel_size=(3, 3), padding='same')(x)
x = BatchNormalization()(x)
x = Activation(activation='relu')(x)
x = MaxPooling2D(pool_size=(2, 2), padding='same')(x)
x = Conv2D(filters=512, kernel_size=(3, 3), padding='same')(x)
x = BatchNormalization()(x)
x = Activation(activation='relu')(x)
x = GlobalAveragePooling2D()(x)
x = Dropout(0.2)(x)
x = RepeatVector(6)(x)
x = GRU(128, return_sequences=True)(x)
out = [
Dense(len(alphabet), name=f'digit{i + 1}', activation='softmax')(
Lambda(lambda z: z[:, i, :],
output_shape=(1, ) + input_shape[2:])(x)) for i in range(6)
]
model = Model(main_input, out)
model.compile(loss='categorical_crossentropy',
optimizer=Adam(0.0001),
metrics=['accuracy'])
checkpoint = ModelCheckpoint(checkpoint_path,
monitor='val_loss',
verbose=1,
save_best_only=True,
save_weights_only=False,
mode='auto')
if data == 1:
earlystop = MinimumEpochEarlyStopping(monitor='val_loss',
patience=10,
verbose=1,
mode='auto',
min_epoch=5)
else:
earlystop = MinimumEpochEarlyStopping(monitor='val_loss',
patience=10,
verbose=1,
mode='auto',
min_epoch=10)
tensorBoard = TensorBoard(log_dir=log_dir, histogram_freq=1)
callbacks_list = [tensorBoard, earlystop, checkpoint]
# callbacks_list = [tensorBoard]
model.summary()
train_history = model.fit(
train_generator,
steps_per_epoch=train_generator.n // train_generator.batch_size,
epochs=epochs,
validation_data=valid_generator,
validation_steps=valid_generator.n // valid_generator.batch_size,
verbose=1,
callbacks=callbacks_list)
with open(f"{version}.txt", "w") as file:
loss_idx = np.argmin(train_history.history['val_loss'])
digit6_idx = np.argmax(train_history.history['val_digit6_accuracy'])
file.write(f"{train_history.history['val_loss'][loss_idx]}\n")
file.write(
f"{train_history.history['val_digit1_accuracy'][loss_idx]}\n")
file.write(
f"{train_history.history['val_digit2_accuracy'][loss_idx]}\n")
file.write(
f"{train_history.history['val_digit3_accuracy'][loss_idx]}\n")
file.write(
f"{train_history.history['val_digit4_accuracy'][loss_idx]}\n")
file.write(
f"{train_history.history['val_digit5_accuracy'][loss_idx]}\n")
file.write(
f"{train_history.history['val_digit6_accuracy'][loss_idx]}\n")
file.write(f"{'-'*20}\n")
file.write(f"{train_history.history['val_loss'][digit6_idx]}\n")
file.write(
f"{train_history.history['val_digit1_accuracy'][digit6_idx]}\n")
file.write(
f"{train_history.history['val_digit2_accuracy'][digit6_idx]}\n")
file.write(
f"{train_history.history['val_digit3_accuracy'][digit6_idx]}\n")
file.write(
f"{train_history.history['val_digit4_accuracy'][digit6_idx]}\n")
file.write(
f"{train_history.history['val_digit5_accuracy'][digit6_idx]}\n")
file.write(
f"{train_history.history['val_digit6_accuracy'][digit6_idx]}\n")
K.clear_session()
test_set = test_datagen.flow_from_directory('dataset/test_set',
target_size=(150, 150),
batch_size=32,
class_mode='categorical')
model = models.Sequential()
model.add(
layers.Conv2D(32, (3, 3),
strides=(1, 1),
padding='valid',
activation='relu',
kernel_initializer='glorot_uniform',
input_shape=(150, 150, 3)))
model.add(layers.MaxPooling2D(pool_size=(2, 2), padding='valid'))
model.add(BatchNormalization())
model.add(
layers.Conv2D(
32,
(3, 3),
strides=(1, 1),
padding='valid',
activation='relu',
kernel_initializer='glorot_uniform',
))
model.add(layers.MaxPooling2D(pool_size=(2, 2), padding='valid'))
model.add(BatchNormalization())
model.add(
layers.Conv2D(
64,
(3, 3),
def __init__(self,
n_tasks,
graph_conv_layers,
dense_layer_size=128,
dropout=0.0,
mode="classification",
number_atom_features=75,
n_classes=2,
batch_normalize=True,
uncertainty=False,
batch_size=100):
"""An internal keras model class.
The graph convolutions use a nonstandard control flow so the
standard Keras functional API can't support them. We instead
use the imperative "subclassing" API to implement the graph
convolutions.
All arguments have the same meaning as in GraphConvModel.
"""
super(_GraphConvKerasModel, self).__init__()
if mode not in ['classification', 'regression']:
raise ValueError(
"mode must be either 'classification' or 'regression'")
self.mode = mode
self.uncertainty = uncertainty
if not isinstance(dropout, collections.Sequence):
dropout = [dropout] * (len(graph_conv_layers) + 1)
if len(dropout) != len(graph_conv_layers) + 1:
raise ValueError('Wrong number of dropout probabilities provided')
if uncertainty:
if mode != "regression":
raise ValueError(
"Uncertainty is only supported in regression mode")
if any(d == 0.0 for d in dropout):
raise ValueError(
'Dropout must be included in every layer to predict uncertainty'
)
self.graph_convs = [
layers.GraphConv(layer_size, activation_fn=tf.nn.relu)
for layer_size in graph_conv_layers
]
self.batch_norms = [
BatchNormalization(fused=False) if batch_normalize else None
for _ in range(len(graph_conv_layers) + 1)
]
self.dropouts = [
Dropout(rate=rate) if rate > 0.0 else None for rate in dropout
]
self.graph_pools = [layers.GraphPool() for _ in graph_conv_layers]
self.dense = Dense(dense_layer_size, activation=tf.nn.relu)
self.graph_gather = layers.GraphGather(batch_size=batch_size,
activation_fn=tf.nn.tanh)
self.trim = TrimGraphOutput()
if self.mode == 'classification':
self.reshape_dense = Dense(n_tasks * n_classes)
self.reshape = Reshape((n_tasks, n_classes))
self.softmax = Softmax()
else:
self.regression_dense = Dense(n_tasks)
if self.uncertainty:
self.uncertainty_dense = Dense(n_tasks)
self.uncertainty_trim = TrimGraphOutput()
self.uncertainty_activation = Activation(tf.exp)
