def __init__(self, monitor="acc", patience=10, verbose=0, desired="high"):
EarlyStopping.__init__(self, monitor=monitor, patience=patience, verbose=verbose)
self.logs = {}
if desired == "high":
self.check_improved = lambda new, old: new > old
self.best = -self.best
else:
self.check_improved = lambda new, old: new < old
p.add_argument('sigma', type=float)
p.add_argument('--history')
p.add_argument('--batch_size', default=4, type=int)
p.add_argument('--epochs', default=64, type=int)
p.add_argument('--cont', action='store_true')
args = p.parse_args()
train_generator, val_generator, train_batches, val_batches = \
create_generators(args.data_directory, \
args.density_scale, args.sigma, args.batch_size)
# Setup callbacks
early_stopping = EarlyStopping(patience=5, verbose=2)
model_checkpoint = ModelCheckpoint(args.model, save_best_only=True, verbose=2)
callbacks = [early_stopping, model_checkpoint]
if args.history is not None:
csv_logger = CSVLogger(args.history, append=True)
callbacks.append(csv_logger)
# Load model
custom_objects = dict(inspect.getmembers(losses, inspect.isfunction))
model = models.load_model(args.model, custom_objects=custom_objects)
model.summary()
# Get score
if args.cont:
losses = model.evaluate_generator(val_generator, val_batches)
val_loss_idx = model.metrics_names.index('loss')
model.add(BatchNormalization())
model.add(Dropout(0.25))
model.add(Flatten())
#model.add(Dense(1024, activation = "relu"))
#model.add(Dropout(0.5))
model.add(Dense(512, activation = "relu"))
model.add(Dropout(0.5))
model.add(Dense(2, activation = "softmax"))
model.compile(optimizer='adam',
loss='categorical_crossentropy',
metrics=['accuracy'])
model.summary()
# model callbacks
early_stop = EarlyStopping('val_loss', patience=patience)
ReduceLROnPlateau(monitor='val_acc',
patience=50,
verbose=1,
factor=0.5,
min_lr=0.00001)
model_names = trained_models_path + '.{epoch:02d}-{val_acc:.2f}.hdf5'
model_checkpoint = ModelCheckpoint(model_names,
monitor='val_loss',
verbose=1,
save_best_only=True,
save_weights_only=False)
callbacks = [model_checkpoint, csv_logger, early_stop, reduce_lr]
# training model
model_checkpoint = ModelCheckpoint(
filepath=
'ssd7_epoch-{epoch:02d}_loss-{loss:.4f}_val_loss-{val_loss:.4f}.h5',
monitor='val_loss',
verbose=1,
save_best_only=True,
save_weights_only=False,
mode='auto',
period=1)
csv_logger = CSVLogger(filename='ssd_training_log.csv',
separator=',',
append=True)
early_stopping = EarlyStopping(monitor='val_loss',
min_delta=0.0,
patience=10,
verbose=1)
reduc_learning_rate = ReduceLROnPlateau(monitor='val_loss',
factor=0.2,
patience=8,
verbose=1,
epsilon=0.001,
cooldown=0,
min_lr=0.00001)
callbacks = [model_checkpoint, csv_logger, early_stopping, reduc_learning_rate]
initial_epoch = 0
final_epoch = 20
steps_per_epoch = 1000
train_dir,
# All images will be resized to 150x150
target_size=(150, 150),
batch_size=20,
# Since we use binary_crossentropy loss, we need binary labels
class_mode='categorical')
validation_generator = test_datagen.flow_from_directory(
validation_dir,
target_size=(150, 150),
batch_size=20,
class_mode='categorical')
#Early stopping is required when system realizes that there is no improvement after ceratin epochs
from keras.callbacks import ModelCheckpoint, EarlyStopping
early_stopping = EarlyStopping(monitor='val_loss', patience=3, verbose=1, mode='auto')
#Save weights in model.h5
save_weights = ModelCheckpoint('model.h5', monitor='val_loss', save_best_only=True)
history = model.fit_generator(train_generator, steps_per_epoch=2000//20, epochs=2, validation_data=validation_generator,
validation_steps=1000//20,
callbacks=[early_stopping, save_weights])
targets_train_a = np.array(a[t])
print(inputs_train.shape)
print(targets_train_v.shape)
print(targets_train_a.shape)
print(inputs_validation.shape)
print(targets_validation_v.shape)
print(targets_validation_a.shape)
cb_bestModel = ModelCheckpoint('model_checkpoints/model_best.h5',
monitor='val_loss',
mode='min',
verbose=1,
save_best_only=True)
cb_earlyStop = EarlyStopping(
monitor='val_loss', mode='min', verbose=1, patience=5
) # waiting for X consecutive epochs that don't reduce the val_loss
cb_learningRate = LearningRateScheduler(scheduler)
# datagen = ImageDataGenerator(
# rotation_range=30,
# width_shift_range=0.25,
# height_shift_range=0.25,
# horizontal_flip=True,
# brightness_range=[0.5, 1.5],
# zoom_range=0.3)
# inputs_train = np.array(inputs_train)
# datagen.fit(inputs_train[1])
# gen1 = datagen.flow(inputs_train, targets_train, batch_size=BATCH_SIZE)
# train_steps = len(gen1)
for x in range(num_hidden_layers):
model.add(Dense(512, activation=activationFN))
#model.add(Dropout(0.2))
# Final output layer. Use softmax for probability.
model.add(Dense(num_classes, activation='softmax'))
model.summary()
# Compile the model with loss function and optimiser.
model.compile(loss=lossFN,
optimizer=optimiserFN,
metrics=['accuracy'])
#Early stopping of the training if loss increases too often.
early_stopping = EarlyStopping(monitor='val_loss', min_delta=0.0001, patience=15)
# Add below to only use the best weights (on keras 2.3+ which means no AMD support)
#, restore_best_weights=True)
#Fit model based on training and validation datasets.
history = model.fit(x_train, y_train,
batch_size=batch_size,
epochs=epochs,
verbose=1,
validation_split=1.0/12.0,
callbacks=[TimeHistory(), early_stopping])
# callbacks=[PlotLossesKeras()])
# callbacks=[early_stopping])
#Test the model based on testing dataset.
score = model.evaluate(x_test, y_test, verbose=0)
model.add(Activation('softmax'))
print(model.summary())
from keras.optimizers import RMSprop, SGD, Adam
from keras.callbacks import ModelCheckpoint, EarlyStopping, ReduceLROnPlateau
checkpoint = ModelCheckpoint('Emotion_little_vgg.h5',
monitor='val_loss',
mode='min',
save_best_only=True,
verbose=1)
earlystop = EarlyStopping(monitor='val_loss',
min_delta=0,
patience=3,
verbose=1,
restore_best_weights=True)
reduce_lr = ReduceLROnPlateau(monitor='val_loss',
factor=0.2,
patience=3,
verbose=1,
min_delta=0.0001)
callbacks = [earlystop, checkpoint, reduce_lr]
model.compile(loss='categorical_crossentropy',
optimizer=Adam(lr=0.001),
metrics=['accuracy'])
model.add(Dropout(0.2))
model.add(Dense(200, activation='linear'))
model.add(Dropout(0.2))
model.add(Dense(200, activation='linear'))
model.add(Dropout(0.2))
model.add(Dense(200, activation='linear'))
model.add(Dropout(0.2))
model.add(Dense(200, activation='linear'))
model.add(Dropout(0.2))
model.add(Dense(1, activation='linear'))
model.summary()
# EarlyStopping & ModelCheckpoint(use x) & Tensorboard(use x)
from keras.callbacks import EarlyStopping, ModelCheckpoint, TensorBoard
es = EarlyStopping(monitor='val_loss', patience=50, mode='auto')
modelpath = './model/{epoch:02d}-{val_loss:.4f}.hdf5'
cp = ModelCheckpoint(filepath=modelpath,
monitor='val_loss',
save_best_only=True,
mode='auto')
tb = TensorBoard(log_dir='graph',
histogram_freq=0,
write_graph=True,
write_images=True)
### 3. 훈련
model.compile(loss='mse', optimizer='adam', metrics=['mse'])
model.fit(x_train,
np.random.seed(113) #set seed before any keras import
model = Sequential()
model.add(Dense(200, input_shape=(vocab_size,), kernel_initializer='he_uniform', kernel_constraint=maxnorm(5)))
model.add(Activation('relu'))
model.add(Dropout(0.4))
model.add(Dense(1))
model.add(Activation('sigmoid'))
optimizer =Adadelta(lr=0.22)
model.compile(loss='binary_crossentropy', optimizer=optimizer, metrics=['accuracy'])
print(model.summary())
model.fit(X_train_nhot, y_train,validation_split=0.1 , epochs=15, verbose=1, batch_size=128)
loss, accuracy = model.evaluate(X_test_nhot,y_test)
EarlyStopping(monitor='val_loss',
min_delta=0,
patience=2,
verbose=0, mode='auto')
print("Accuracy: ", accuracy *100)
feed_forward = model.predict_classes(X_test_nhot, verbose=1)
t = Tokenizer()
t.fit_on_texts(X_train)
vocab_size = len(t.word_index) + 1
encoded_docs = t.texts_to_sequences(X_train)
encoded_doc = t.texts_to_sequences(X_test)
y = np.zeros((yards.shape[0], 199))
for idx, target in enumerate(list(yards)):
y[idx][99 + target] = 1
# Use train/test index to split target variable
train_inds, val_inds = X_train.index, X_val.index
y_train, y_val = y[train_inds], y[val_inds]
X_train = [np.absolute(X_train[i]) for i in cat] + [X_train[num]]
X_val = [np.absolute(X_val[i]) for i in cat] + [X_val[num]]
model = model_NN()
model.compile(optimizer='Adam', loss='categorical_crossentropy', metrics=[])
es = EarlyStopping(monitor='val_CRPS',
mode='min',
restore_best_weights=True,
verbose=2,
patience=5)
es.set_model(model)
# cb = keras.callbacks.ReduceLROnPlateau(
# monitor='val_CRPS',
# factor=0.01,
# patience=5
# )
metric = Metric(model, [es], [(X_train, y_train), (X_val, y_val)])
# for i in range(1):
# model.fit(X_train, y_train, verbose=False)
# for i in range(1):
shuffle=False,
class_mode='categorical')
test_set = test_datagen.flow_from_directory('../dataset/test',
target_size=(64, 64),
color_mode='rgb',
batch_size=32,
shuffle=False,
class_mode='categorical')
# inicializar e otimizar modelo
print("[INFO] Inicializando e otimizando a CNN...")
start = time.time()
early_stopping_monitor = EarlyStopping(monitor='val_loss',
mode='min',
verbose=1,
patience=15)
model = Convolucao.build(64, 64, 3, CLASS)
model.compile(optimizer=SGD(0.01),
loss="categorical_crossentropy",
metrics=["accuracy"])
# treinar a CNN
print("[INFO] Treinando a CNN...")
classifier = model.fit_generator(
training_set,
steps_per_epoch=(training_set.n // training_set.batch_size),
epochs=EPOCHS,
validation_data=test_set,
validation_steps=(test_set.n // test_set.batch_size),
def predict(epochs=20,batch_size=256,**kwargs):
seed(1)
mymodel = build_model_att(**kwargs)
class TEST_MSE(Callback):
def __init__(self):
self.x_test = x_test
self.y_test = y_test
def on_train_begin(self, logs={}):
self.mse = []
def on_epoch_end(self, batch, logs={}):
def _mse(y_pred,y_test):
return np.mean((y_pred-y_test)**2)
epoch_end_predict = mymodel.predict(self.x_test)
self.mse.append(_mse(epoch_end_predict[:,0],self.y_test))
#回调函数
mse_hist = TEST_MSE()
reduce_lr = ReduceLROnPlateau(monitor='val_loss', factor=0.1,
patience=5, min_lr=1e-5)
#restore_best_weights=True--返回监控指标最好的模型
early_stopping = EarlyStopping(monitor='val_loss', patience=10, verbose=2,
restore_best_weights=True)
history = mymodel.fit(x_train, y_train,epochs=epochs, batch_size=batch_size,
validation_data = (x_val,y_val),verbose=True,
callbacks=[mse_hist,reduce_lr,early_stopping])
y_pred = mymodel.predict(x_test)
#计算模型在测试集上的mse
print('mse:%.4f' % _mse(y_pred[:,0],y_test))
#画出训练集和验证集上的loss变化情况
plt.figure()
plt.plot(history.history['loss'],label='train_loss')
plt.plot(history.history['val_loss'],label='val_loss')
plt.plot(mse_hist.mse,label = 'test_loss')
#分别画出val loss和test loss的最小值点
def _highlight(x,y,color,loc,upx=0.8,upy=1.4,downx=0.8,downy=0.6):
# 显示坐标点
plt.scatter(x,y,s=20,marker='x')
# 显示坐标点横线、竖线
plt.vlines(x, 0, y, colors=color, linestyles="dashed", linewidth=1)
plt.hlines(y, 0, x, colors=color, linestyles="dashed", linewidth=1)
# 显示坐标点坐标值
if loc == 'up':
plt.annotate('(%d,%.4f)'%(x,y), xy=(x,y), xytext=(x*upx,y*upy),
arrowprops=dict(facecolor='black', shrink=0.05, width=0.2, headwidth=0.5, headlength=0.5))
if loc == 'down':
plt.annotate('(%d,%.4f)'%(x,y), xy=(x,y), xytext=(x*downx,y*downy),
arrowprops=dict(facecolor='black', shrink=0.05, width=0.2, headwidth=0.5, headlength=0.5))
val_min_x = np.argmin(history.history['val_loss'])
val_min_y = history.history['val_loss'][val_min_x]
_highlight(val_min_x,val_min_y,color='black',loc='down')
_highlight(val_min_x,mse_hist.mse[val_min_x],color='black',loc='up')
test_min_x = np.argmin(mse_hist.mse)
test_min_y = mse_hist.mse[test_min_x]
_highlight(test_min_x,test_min_y,color='black',loc='up',upy=1.2)
plt.grid()
plt.legend()
name = ['%s_%s' % (i.replace('_','-'),j) for i,j in kwargs.items()]
name = '_'.join(name[:(len(name)//3)]) + '\n' + '_'.join(name[(len(name)//3):])
name = name.replace('.','')
plt.title(name)
plt.savefig('result/fig/'+name,dpi=800)
return y_pred
def main():
#hyperparameters:
num_types = 4
n_epochs = 100
start_frame = 10
jump_frame = 2
class_samples = {0: 6000, 1: 6000, 2: 5000, 3: 2000}
es_patience = 20
dropout = 0.5
n_splits = 5
X = np.load('/sonidata/flatworms/dchaike1_scratch/dchaike1/new_shape_stack_X.npy')
y = np.load('/sonidata/flatworms/dchaike1_scratch/dchaike1/new_shape_stack_y.npy')
print("hello")
#filtering some of the classes from the dataset
X, y = filter_classes(X, y)
X = np.expand_dims(X, -1)
print('Original dataset shape %s' % Counter(y))
print(X.shape)
print(y.shape)
X, y = shuffle(X, y)
matrices = np.zeros((n_splits, num_types, num_types))
total_test_pred = None
total_test_ans = None
#implementing cross-validation:
skf = StratifiedKFold(n_splits = n_splits)
i_fold = 0
for rest_ind, test_ind in skf.split(X, y):
X_test, y_test = X[test_ind], y[test_ind]
X_rest, y_rest = X[rest_ind], y[rest_ind]
#X_train, y_train = X_rest, y_rest
val_skf = StratifiedKFold(n_splits = n_splits - 1)
for train_ind, val_ind in skf.split(X_rest, y_rest):
X_val, y_val = X_rest[val_ind], y_rest[val_ind]
X_train, y_train = X_rest[train_ind], y_rest[train_ind]
break
print('split trainset shape %s' % Counter(y_train))
print(X_train.shape)
print(y_train.shape)
#converting the labels to one-hot-vector
y_train = to_categorical(y_train)
y_test = to_categorical(y_test)
y_val = to_categorical(y_val)
X_train, y_train = extract_frames(X_train, y_train, start_frame, jump_frame)
print('extracted trainset shape %s' % Counter(y_train.argmax(axis=-1)))
print(X_train.shape)
print(y_train.shape)
X_val, y_val = extract_frames(X_val, y_val, num_types, jump_frame)
#starting from start_frame in the test set
X_new_test = np.zeros((X_test.shape[0], X_test.shape[1]-start_frame, X_test.shape[2], X_test.shape[3], X_test.shape[4]))
y_new_test = np.ones((X_test.shape[0], num_types))
for i, sequence in enumerate(X_test):
X_new_test[i] = sequence[start_frame:]
y_new_test[i] = y_test[i]
X_test, y_test = X_new_test, y_new_test
#solving class imbalance in the training set
print('balanced trainset shape %s' % Counter(y_train.argmax(axis=-1)))
print(X_train.shape)
base_model = keras.applications.xception.Xception(weights="imagenet", include_top=False)
avg = keras.layers.GlobalAveragePooling2D()(base_model.output)
output = keras.layers.Dense(num_types, activation="softmax")(avg)
model = keras.Model(inputs=base_model.input, outputs=output)
model.compile(optimizer= "Nadam", loss = focal_loss(),
metrics=['accuracy', metrics.recall, metrics.precision])
X_train = np.concatenate([X_train, X_train, X_train], axis=-1)
X_val = np.concatenate([X_val, X_val, X_val], axis=-1)
history = model.fit(X_train, y_train,
validation_data=[X_val, y_val],
epochs=n_epochs,
callbacks=[EarlyStopping(patience=es_patience)])
X_train = None
X_val = None
X_test = np.concatenate([X_test, X_test, X_test], axis=-1)
print("fold " + str(i_fold))
y_test = [np.argmax(truth) for truth in y_test]
test(model, X_test, y_test)
test_pred = probability_predict(model, X_test)
test_ans = y_test
if(i_fold == 0):
total_test_pred = test_pred
total_test_ans = test_ans
else:
total_test_pred = np.concatenate([total_test_pred, test_pred], axis = 0)
total_test_ans = np.concatenate([total_test_ans, test_ans], axis = 0)
test_pred = None
test_ans = None
# summarize history for accuracy
plt.plot(history.history['acc'])
plt.plot(history.history['val_acc'])
plt.title('model accuracy')
plt.ylabel('accuracy')
plt.xlabel('epoch')
plt.legend(['train', 'test'], loc='upper left')
plt.show()
# summarize history for loss
plt.plot(history.history['loss'])
plt.plot(history.history['val_loss'])
plt.title('model loss')
plt.ylabel('loss')
plt.xlabel('epoch')
plt.legend(['train', 'test'], loc='upper left')
plt.show()
save_command = input("Save this model? (yes/no)")
if save_command == 'yes':
model_name = input("Name your model: ")
model.save(model_name + str(i_fold) + ".h5")
print("The model is saved!")
i_fold += 1
print("Overall Performance using Probabilities Method")
analyze(total_test_pred, total_test_ans)
if len(sys.argv) != 2:
print('Usage: python train_flip_augmented.py <augmented_array_index_no>')
sys.exit(1)
index = int(sys.argv[1])
image_file = 'augmented_images_{}.npy'.format(index)
mask_file = 'augmented_masks_{}.npy'.format(index)
print('Index: {}, Image File: {}, Mask File: {}'.format(index, image_file, mask_file))
image_array = np.load(os.path.join('train/generated/flipped_images', image_file))
mask_array = np.load(os.path.join('train/generated/flipped_masks', mask_file))
image_shape = image_array.shape
indices = np.arange(0, image_shape[0])
np.random.shuffle(indices)
image_array = image_array[indices]
mask_array = mask_array[indices]
unet_model = load_model('model-tgs-salt-dropout-2.h5', custom_objects={'mean_iou': mean_iou})
earlystopper = EarlyStopping(patience=5, verbose=1)
checkpointer = ModelCheckpoint('model-tgs-flip-augmented-2.h5', verbose=1, save_best_only=True)
results = unet_model.fit(image_array, mask_array, validation_split=0.3, batch_size=64, epochs=70,
callbacks=[checkpointer])
def __init__(self):
# Variables to hold the description of the experiment
self.config_description = "This is the template config file."
# System dependent variable
self._workers = 5
self._multiprocessing = True
# Variables for comet.ml
self._project_name = "jpeg_deep"
self._workspace = "ssd"
# Network variables
self._weights = "/dlocal/home/2017018/bdegue01/weights/jpeg_deep/classification_dct/resnet_deconv/classification_dct_jpeg-deep_GYftBmXMdjdxoMksyI3e9VqB5IriBC9T/checkpoints/epoch-87_loss-0.7459_val_loss-1.5599.h5"
self._network = SSD300_resnet(
backbone="deconv_rfa", dct=True, image_shape=(38, 38))
# Training variables
self._epochs = 240
self._batch_size = 32
self._steps_per_epoch = 1000
self.optimizer_parameters = {
"lr": 0.001, "momentum": 0.9}
self._optimizer = SGD(**self.optimizer_parameters)
self._loss = SSDLoss(neg_pos_ratio=3, alpha=1.0).compute_loss
self._metrics = None
dataset_path = environ["DATASET_PATH"]
images_2007_path = join(dataset_path, "VOC2007/JPEGImages")
self.train_sets = [(images_2007_path, join(
dataset_path, "VOC2007/ImageSets/Main/train.txt"))]
self.validation_sets = [(images_2007_path, join(
dataset_path, "VOC2007/ImageSets/Main/val.txt"))]
self.test_sets = [(images_2007_path, join(
dataset_path, "VOC2007/ImageSets/Main/test.txt"))]
# Keras stuff
self.model_checkpoint = None
self.reduce_lr_on_plateau = ReduceLROnPlateau(patience=5, verbose=1)
self.terminate_on_nan = TerminateOnNaN()
self.early_stopping = EarlyStopping(monitor='val_loss',
min_delta=0,
patience=15)
self._callbacks = [self.reduce_lr_on_plateau, self.early_stopping,
self.terminate_on_nan]
self.input_encoder = SSDInputEncoder()
self.train_transformations = [SSDDataAugmentation()]
self.validation_transformations = [
ConvertTo3Channels(), Resize(height=300, width=300)]
self.test_transformations = [ConvertTo3Channels(), Resize(
height=300, width=300)]
self._train_generator = None
self._validation_generator = None
self._test_generator = None
self._horovod = None
self._displayer = DisplayerObjects()
def get_callbacks(path):
early_stop = EarlyStopping('val_loss', patience=5, mode="min")
model_ckpt = ModelCheckpoint(path, save_best_only=True)
return [early_stop, model_ckpt]
test_generator = test_datagen.flow_from_directory( test_data_dir,
target_size =(img_width, img_height), shuffle=False,
batch_size = 1, class_mode ='categorical')
# confirm the iterator works
#batchX, batchy = train_generator.next()
#print('Batch shape=%s, min=%.3f, max=%.3f' % (batchX.shape, batchX.min(), batchX.max()))
#batchX, batchy = validation_generator.next()
#print('Batch shape=%s, min=%.3f, max=%.3f' % (batchX.shape, batchX.min(), batchX.max()))
#batchX, batchy = test_generator.next()
#print('Batch shape=%s, min=%.3f, max=%.3f' % (batchX.shape, batchX.min(), batchX.max()))
# simple early stopping
es = EarlyStopping(monitor='val_loss', mode='min', verbose=1, patience=30)
mc = ModelCheckpoint('best_model.h5', monitor='val_acc', mode='max', verbose=1, save_best_only=True)
model.fit_generator(train_generator,
steps_per_epoch = train_generator.samples // batch_size, callbacks=[es, mc],
epochs = epochs, validation_data = validation_generator,
validation_steps = validation_generator.samples // batch_size)
"""
epochs = epochs, validation_data = validation_generator,
validation_steps = nb_validation_samples // batch_size)
"""
# load the saved model
saved_model = load_model('best_model.h5')
# make a prediction
def _kappa_disambiguation(self, X, output):
'''
:param X:
:param output:
'''
self.metric_plot = None
self.patience = 20 #for cbEarly is enoughfrom observation @todo in init
if self.metrics[0] == "accuracy":
self.metric_plot = "acc"
raise "min_delta must be redefined according to val_acc"
if self.use_smooth_cb:
raise 'not available for acc self.use_smooth_cb'
if self.cbEarly == "metric":
self.cbEarly = EarlyStopping(
monitor='val_acc' if self.validation else "acc",
min_delta=0.0001,
patience=self.patience,
verbose=0,
mode='auto')
self.kappa_logger = None
elif self.metrics[0] == 'cohen_kappa':
self.metrics = None # 'cohen_kappa_metric' cannot be supported @see explication in Cohen_kappa_logger
self.metric_plot = 'cohen_kappa'
if self.cbEarly == "metric":
if self.validation:
monitor = "val_cohen_kappa_smoothed" if self.smooth_cb else "val_cohen_kappa"
else:
if not self.smooth_cb:
monitor = "cohen_kappa"
else:
raise "No cohen_kappa_smoothed"
print("monitor", monitor)
self.cbEarly = EarlyStopping(
monitor=monitor if self.validation else "cohen_kappa",
min_delta=0.00000001,
patience=self.patience, # a large patience is necessary!
verbose=0,
mode='max',
restore_best_weights=True)
if type(self.validation) is float:
X, X_val, output, y_val = train_test_split(
X, output, test_size=self.validation)
elif type(self.validation) is tuple:
assert self.validation[0].shape[1] == X.shape[
1], "X_validation must be transformed with prep first"
X_val = self.validation[0]
y_val = self.__category_to_output(self.validation[1])
elif not self.validation is None:
raise "unknown validation type"
# self.validation = None # can slightly reduce computation but need val_loss for callback LRReduceOnPlateau
self.kappa_logger = Cohen_kappa_logger(
output_to_category=self.__output_to_category,
X_train=X,
y_train=output,
X_val=X_val,
y_val=y_val,
kappa_weights=self.kappa_weights)
else:
print(self.metrics[0])
raise "not implemented"
return X, output
plot_model(model, 'semiArcFork.png', show_shapes=True, rankdir='TB')
model.summary()
cpr = os.path.join(config.expRoot, 'checkPoint')
if not os.path.exists(cpr):
os.makedirs(cpr)
mcp = ModelCheckpoint(
os.path.join(cpr,
r'AugClassifyFork_{epoch:03d}-{val_loss:.6f}-{val_dense_5_loss:.6f}-{val_conv3d_2_loss:.6f}-{dense_5_recall:.6f}-{dense_5_precision:.6f}.hdf5'),
'val_loss', period=2)
logP = os.path.join(config.expRoot, 'log')
if not os.path.exists(logP):
os.makedirs(logP)
logger = CSVLogger(os.path.join(logP, 'log .txt'))
lrReduce = ReduceLROnPlateau(factor=config.lrReduceRate, patience=config.lrReducePatience, verbose=1)
estp = EarlyStopping(patience=config.estpPatient, verbose=1, min_delta=config.estpDelta, )
model.fit_generator(semiDatagene(mode='train', batchSize=batchSize), steps_per_epoch=int(np.ceil(3020 / batchSize)),
epochs=config.epochs,
callbacks=[logger, mcp, lrReduce, estp, ],
validation_data=semiDatagene(mode='test', batchSize=batchSize),
validation_steps=int(np.ceil(4809 / batchSize)))
# model.fit_generator(semiDatagene(mode='train', batchSize=batchSize), steps_per_epoch=10,
# epochs=config.epochs,
# callbacks=[logger, mcp, lrReduce, estp, ],
# validation_data=semiDatagene(mode='test', batchSize=batchSize),
# validation_steps=10)
visualLoss(os.path.join(logP, 'log.txt'))
def main(_run):
################################
# Load Experiment's paramaters #
################################
params = vars(args)
logger.info(params)
################################
# Load Dataset #
################################
dataset_name = params['dataset']
if dataset_name == 'gefcom':
dataset = gefcom2014
else:
dataset = uci_single_households
data = dataset.load_data(fill_nan='median',
preprocessing=True,
split_type='simple',
is_train=params['train'],
detrend=params['detrend'],
exogenous_vars=params['exogenous'],
use_prebuilt=True)
scaler, train, test, trend = data['scaler'], data['train'], data['test'], data['trend']
if not params['detrend']:
trend = None
X_train, y_train = get_rnn_inputs(train,
window_size=params['input_sequence_length'],
horizon=params['output_sequence_length'],
shuffle=True,
multivariate_output=params['exogenous'])
################################
# Build & Train Model #
################################
tcn = TCNModel(layers=params['layers'],
filters=params['out_channels'],
kernel_size=params['kernel_size'],
kernel_initializer='glorot_normal',
kernel_regularizer=l2(params['l2_reg']),
bias_regularizer=l2(params['l2_reg']),
dilation_rate=params['dilation'],
use_bias=False,
return_sequence=True,
tcn_type=params['tcn_type'])
if params['exogenous']:
exog_var_train = y_train[:, :, 1:] # [n_samples, horizon, n_features]
y_train = y_train[:, :, 0] # [n_samples, horizon]
conditions_shape = (exog_var_train.shape[1], exog_var_train.shape[-1])
X_test, y_test = get_rnn_inputs(test,
window_size=params['input_sequence_length'],
horizon=params['output_sequence_length'],
shuffle=False,
multivariate_output=True)
exog_var_test = y_test[:, :, 1:] # [n_samples, horizon, n_features]
y_test = y_test[:, :, 0] # [n_samples, horizon]
else:
X_test, y_test = get_rnn_inputs(test,
window_size=params['input_sequence_length'],
horizon=params['output_sequence_length'],
shuffle=False)
exog_var_train = None
exog_var_test = None
conditions_shape = None
# IMPORTANT: Remember to pass the trend values through the same ops as the inputs values
if params['detrend']:
X_trend_test, y_trend_test = get_rnn_inputs(trend[1],
window_size=params['input_sequence_length'],
horizon=params['output_sequence_length'],
shuffle=False)
trend = y_trend_test
model = tcn.build_model(input_shape=(X_train.shape[1], X_train.shape[-1]),
horizon=params['output_sequence_length'],
conditions_shape=conditions_shape,
use_final_dense=True)
if params['load'] is not None:
logger.info("Loading model's weights from disk using {}".format(params['load']))
model.load_weights(params['load'])
optimizer = Adam(params['learning_rate'])
model.compile(optimizer=optimizer, loss=['mse'], metrics=metrics)
callbacks = [EarlyStopping(patience=50, monitor='val_loss')]
if params['exogenous'] and params['tcn_type'] == 'conditional_tcn':
history = model.fit([X_train, exog_var_train], y_train,
validation_split=0.1,
batch_size=params['batch_size'],
epochs=params['epochs'],
callbacks=callbacks,
verbose=2)
else:
history = model.fit(X_train, y_train,
validation_split=0.1,
batch_size=params['batch_size'],
epochs=params['epochs'],
callbacks=callbacks,
verbose=2)
################################
# Save weights #
################################
model_filepath = os.path.join(
config['weights'],'{}_{}_{}'
.format(params['tcn_type'], params['dataset'], time.time()))
model.save_weights(model_filepath)
logger.info("Model's weights saved at {}".format(model_filepath))
#################################
# Evaluate on Validation & Test #
#################################
fn_inverse_val = lambda x: dataset.inverse_transform(x, scaler=scaler, trend=None)
fn_inverse_test = lambda x: dataset.inverse_transform(x, scaler=scaler, trend=trend)
fn_plot = lambda x: plot(x, dataset.SAMPLES_PER_DAY, save_at=None)
if params['exogenous'] and params['tcn_type'] == 'conditional_tcn':
val_scores = tcn.evaluate(history.validation_data[:-1], fn_inverse=fn_inverse_val)
test_scores = tcn.evaluate([[X_test, exog_var_test], y_test], fn_inverse=fn_inverse_test, fn_plot=fn_plot)
else:
val_scores = tcn.evaluate(history.validation_data[:-1], fn_inverse=fn_inverse_val)
test_scores = tcn.evaluate([X_test, y_test], fn_inverse=fn_inverse_test, fn_plot=fn_plot)
metrics_names = [m.__name__ if not isinstance(m, str) else m for m in model.metrics]
return dict(zip(metrics_names, val_scores)), \
dict(zip(metrics_names, test_scores)), \
model_filepath
for layer in base_model.layers:
layer.trainable = False
#this is the model we will train
model = Model(inputs=base_model.inputs, outputs=pred)
checkpoint = ModelCheckpoint("resnet50_1.h5",
monitor='val_acc',
verbose=1,
save_best_only=True,
save_weights_only=False,
mode='auto',
period=1)
early = EarlyStopping(monitor='val_acc',
min_delta=0,
patience=10,
verbose=1,
mode='auto')
#freeze all lower level layers
for layer in base_model.layers:
layer.trainable = False
model.compile(optimizer='sgd',
loss='categorical_crossentropy',
metrics=['accuracy'])
img_rows, img_cols = 256, 256 # Resolution of inputs
channel = 3
batch_size = 16
nb_epoch = 12
def main():
args = firstPassCommandLine()
trainF = args.pruneInpTrain
validF = args.pruneInpValid
weightF = args.pruneWeight
validWeightF = args.pruneValidWeight
testF = args.pruneInpTest
modelF = args.pruneF
nepoch = args.nepoch
batchSize = args.batchSize
# Load sample weights
weights = load_weight(weightF)
valid_weights = load_weight(validWeightF)
# Load data in the svm rank file format
trainfeats, trainlabels = load_svmlight(trainF)
validfeats, validlabels = load_svmlight(validF)
testfeats_exists = False
#weights = weights[:len(trainlabels)] valid_weights = valid_weights[:len(validlabels)]
if testF != None:
testfeats, testlabels = load_svmlight(testF)
testfeats_exists = True
else:
testfeats = None
testlabels = None
# convert to dense array
trainfeats = np.array(trainfeats.todense())
validfeats = np.array(validfeats.todense())
if testfeats_exists:
testfeats = np.array(testfeats.todense())
# concatenate weights to data points for oversampling
trainfeats_weights = np.hstack(
(trainfeats, np.reshape(weights, (len(weights), 1))))
validfeats_weights = np.hstack(
(validfeats, np.reshape(valid_weights, (len(valid_weights), 1))))
# Apply the random over-sampling
ros = RandomOverSampler()
trainfeats_weights_ros, trainlabels_ros = ros.fit_sample(
trainfeats_weights, trainlabels)
validfeats_weights_ros, validlabels_ros = ros.fit_sample(
validfeats_weights, validlabels)
trainfeats_ros = trainfeats_weights_ros[:, :-1]
trainweights_ros = trainfeats_weights_ros[:, -1]
validfeats_ros = validfeats_weights_ros[:, :-1]
validweights_ros = validfeats_weights_ros[:, -1]
if testfeats_exists:
testfeats_ros, testlabels_ros = ros.fit_sample(testfeats, testlabels)
# Reset labels (not needed anymore since for neural nets, we use labels of 0 and 1 in trj files)
#trainlabels[np.where(trainlabels==-1)[0]] = 0
#validlabels[np.where(validlabels==-1)[0]] = 0
#if testfeats != None:
# testlabels[np.where(testlabels==-1)[0]] = 0
# Create model
INPUT_DIM = trainfeats.shape[1]
pruneModel = getPruneModel(INPUT_DIM)
pruneModel.summary()
## Train model.
early_stopping = EarlyStopping(monitor='val_loss', patience=20)
history = pruneModel.fit(trainfeats_ros, trainlabels_ros,
batch_size=batchSize, \
sample_weight=trainweights_ros,
epochs=nepoch, verbose=1,
validation_data=(validfeats_ros, validlabels_ros, validweights_ros),
callbacks=[early_stopping],
shuffle=True)
# Evaluate on training
train_preds = pruneModel.predict_classes(trainfeats)
train_eval_ = pruneModel.evaluate(trainfeats, trainlabels, verbose=1)
print("[Loss, accuracy] = " + str(train_eval_))
print("Precision = " + str(precision_score(trainlabels, train_preds)))
print("Recall = " + str(recall_score(trainlabels, train_preds)))
train_preds = pruneModel.predict_classes(trainfeats)
train_eval_ = pruneModel.evaluate(trainfeats, trainlabels, verbose=1)
print("[Loss, accuracy] (randomly oversampled) = " + str(train_eval_))
print("Precision (randomly oversampled) = " +
str(precision_score(trainlabels, train_preds)))
print("Recall (randomly oversampled) = " +
str(recall_score(trainlabels, train_preds)))
# Evaluate on test
eval_ = pruneModel.evaluate(validfeats, validlabels, verbose=1)
if testfeats_exists:
eval_ = pruneModel.evaluate(testfeats, testlabels, verbose=1)
print("[Test loss, test accuracy] = " + str(eval_))
eval_ = pruneModel.evaluate(testfeats, testlabels, verbose=1)
print("[Test loss, test accuracy] (randomly oversampled) = " +
str(eval_))
# Save mode
print('Creating: ' + modelF)
export_model(pruneModel, modelF)
pruneModel.save(modelF[:-3] + "_keras.h5")
del pruneModel
be.clear_session()
return
_, sPath = os.path.splitdrive(sOutPath)
sPath, sFilename = os.path.split(sPath)
sFilename, sExt = os.path.splitext(sFilename)
model_name = sPath + '/' + sFilename + str(patchSize[0, 0]) + str(patchSize[0, 1]) + '_lr_' + str(
learningRate) + '_bs_' + str(batchSize)
weight_name = model_name + '_weights.h5'
model_json = model_name + '_json'
model_all = model_name + '_model.h5'
model_mat = model_name + '.mat'
if (os.path.isfile(model_mat)): # no training if output file exists
return
cnn = createModel(patchSize, 1)
opti = keras.optimizers.Adam(lr=learningRate, beta_1=0.9, beta_2=0.999, epsilon=1e-08, decay=0.0)
callbacks = [EarlyStopping(monitor='val_loss', patience=20, verbose=1), ModelCheckpoint(filepath=model_name+'bestweights.hdf5',monitor='val_acc',verbose=0,save_best_only=True,save_weights_only=False)]
#callbacks = [ModelCheckpoint(filepath=model_name+'bestweights.hdf5',monitor='val_acc',verbose=0,save_best_only=True,save_weights_only=False)]
cnn.compile(loss='categorical_crossentropy', optimizer=opti, metrics=['accuracy'])
cnn.summary()
result = cnn.fit(X_train,
y_train,
validation_data=[X_test, y_test],
epochs=iEpochs,
batch_size=batchSize,
callbacks=callbacks,
verbose=1)
score_test, acc_test = cnn.evaluate(X_test, y_test, batch_size=batchSize )
prob_test = cnn.predict(X_test, batchSize, 0)
mod.add(GRU(j, return_sequences=True))
mod.add(GRU(j))
if i == 4:
mod.add(GRU(j, return_sequences=True))
mod.add(GRU(j, return_sequences=True))
mod.add(GRU(j))
if i == 5:
mod.add(GRU(j, return_sequences=True))
mod.add(GRU(j, return_sequences=True))
mod.add(GRU(j, return_sequences=True))
mod.add(GRU(j))
mod.add(Dense(1))
# compile
mod.compile(optimizer='adam', loss='mean_squared_error')
# fit
mod_fitted = mod.fit(
X,
y,
validation_split=0.4,
shuffle=True,
batch_size=256,
epochs=max_epochs,
callbacks=[EarlyStopping(patience=stopping_patience)])
validation_history.append(mod_fitted.history['val_loss'])
# reset graph
K.clear_session()
try:
with open(csv_file, 'w') as csvfile:
writer = csv.writer(csvfile)
writer.writerow(csv_cols)
for i in range(len(image_ids)):
writer.writerow([image_ids[i]] + output[i])
except IOError:
print("I/O error")
from keras.callbacks import TensorBoard, ModelCheckpoint, EarlyStopping
checkpointer = ModelCheckpoint(filepath='./checkpoints/vanilla_model.h5',
verbose=1,
save_best_only=True)
tb = TensorBoard(log_dir='./logs')
early_stopper = EarlyStopping(patience=3)
if test_flag & os.path.exists('./checkpoints/vanilla_model.h5'):
model = architecture(models.load_model('./checkpoints/vanilla_model.h5'))
X_test = []
image_ids = []
temp_x_test_paths = []
"""Sorting the image paths"""
X_test_paths = glob.glob(os.path.join(test_dir, '*.jpg'))
for path in X_test_paths:
temp = re.split('/|-', path)
temp[-1] = (
temp[-1].split('.')[0].zfill(4)) + '.' + temp[-1].split('.')[1]
path = os.path.join(temp[0], temp[1], temp[2], temp[3] + '-' + temp[4])
temp_x_test_paths.append(path)
temp_x_test_paths = sorted(temp_x_test_paths)
nData = min(df['sig'].shape[0], df['bkg'].shape[0])
df['sig'] = df['sig'].sample(frac=1) #[:nData]
df['bkg'] = df['bkg'].sample(frac=1) #[:nData]
# add isSignal variable
df['sig']['isSignal'] = np.ones(len(df['sig']))
df['bkg']['isSignal'] = np.zeros(len(df['bkg']))
df_all = pd.concat([df['sig'],
df['bkg']]).sample(frac=1).reset_index(drop=True)
dataset = df_all.values
X_data = dataset[:, 0:input_dim]
Y_data = dataset[:, input_dim]
early_stopping = EarlyStopping(monitor='val_loss', patience=100)
model_checkpoint = ModelCheckpoint('dense_model.h5',
monitor='val_loss',
verbose=0,
save_best_only=True,
save_weights_only=False,
mode='auto',
period=1)
begt = time.time()
print("Begin Bayesian optimization")
best_auc = 0.0
best_config = {}
res_gp = gp_minimize(objective,
space,
#Definição de variável armazenando o número de colunas
numero_colunas = rede.shape[1]
#Adicionando as camadas
model.add(Dense(10, activation='relu', input_shape=(numero_colunas, )))
model.add(Dense(20, activation='relu'))
model.add(Dense(10, activation='softmax'))
model.add(Dense(3))
#Compilação do modelo e definição da optimização e função de perda
model.compile(optimizer='adam', loss='mean_squared_error')
#Interrompe as interações quando a rede deixa de se aprimorar
from keras.callbacks import EarlyStopping
early_stopping_monitor = EarlyStopping(patience=3)
#Treino do modelo
teste = model.fit(rede_treino,
saida_treino,
validation_data=(rede_teste, saida_teste),
epochs=150,
callbacks=[early_stopping_monitor])
import matplotlib.pyplot as plt
fig, graf_perda = plt.subplots()
graf_perda.plot(teste.history['loss'],
'r',
marker='.',
y_train = np_utils.to_categorical(y_train)
y_test = np_utils.to_categorical(y_test)
model = Sequential()
model.add(Dense(
25,
input_dim=784,
))
model.add(Dense(10))
model.add(Dense(7))
model.add(Dense(5))
model.add(Dense(10))
model.add(Dense(10))
model.summary()
model.compile(loss='categorical_crossentropy',
optimizer='adam',
metrics=['accuracy'])
early_stopping = EarlyStopping(monitor='loss', patience=20)
model.fit(x_train,
y_train,
validation_split=0.2,
epochs=100,
batch_size=1,
verbose=1,
callbacks=[early_stopping])
acc = model.evaluate(x_test, y_test)
print(acc)
# 只需要修改K.square(z_mean)为K.square(z_mean - yh)，也就是让隐变量向类内均值看齐
kl_loss = -0.5 * K.sum(
1 + z_plus_log_var - K.square(z_plus_mean - yh) - K.exp(z_plus_log_var),
axis=-1)
#cos相似度的loss,保證類別向量散度
vae_loss = K.mean(xent_loss + kl_loss)
# add_loss是新增的方法，用于更灵活地添加各种loss
vae.add_loss(vae_loss)
vae.compile(optimizer=keras.optimizers.RMSprop(1e-2))
vae.summary()
history = LossHistory()
early_stopping = EarlyStopping(monitor='val_loss', patience=10, verbose=0)
learning_rate_reduction = ReduceLROnPlateau(monitor='val_loss',
patience=10,
verbose=1,
factor=0.5,
min_lr=0.0001)
vae.fit(
[x_train, y_train],
shuffle=True,
epochs=epochs,
batch_size=batch_size,
validation_data=([x_test, y_test], None),
#validation_split=(0.2),
callbacks=[history, learning_rate_reduction, early_stopping])
model.add(Dropout(0.5))
#Output layer.
model.add(Dense(NUM_CLASSES, activation="softmax"))
#Compile model.
model.compile(loss="categorical_crossentropy",
optimizer="adam",
metrics=["accuracy"])
print("\n\nTraining....\n\n")
#Declare callbacks.
filepath = "./models/model-{epoch:02d}-{val_acc:.2f}.h5"
callbacks = [
EarlyStopping(monitor="val_loss", patience=0),
ModelCheckpoint(filepath=filepath,
monitor="val_loss",
save_best_only=False,
mode="auto",
period=1)
]
#Fit model and store statistics.
stats = model.fit(np.array(X_train),
Y_train,
epochs=EPOCHS,
batch_size=BATCH_SIZE,
validation_data=(X_test, Y_test),
shuffle=True,
verbose=1,
def train(model, annotation_path, input_shape, anchors, num_classes, log_dir):
'''
训练网络
:param model:网络
:param annotation_path:标记文件目录
:param input_shape:输入张量大小
:param anchors: shape 为 (N, 2)，值为聚类中心长宽的数组
:param num_classes: 标签个数
:param log_dir: 保存路径
:return: 无
'''
# 当评价指标不再提升时，减少学习率
reduce_lr = ReduceLROnPlateau(monitor='val_loss',
factor=0.1,
patience=3,
verbose=1)
# 当监测值不再改善时，该回调函数将中止训练
early_stopping = EarlyStopping(monitor='val_loss',
min_delta=0,
patience=10,
verbose=1)
# 训练验证集9：1分类
val_split = 0.1
with open(annotation_path) as f:
lines = f.readlines()
np.random.shuffle(lines)
num_val = int(len(lines) * val_split)
num_train = len(lines) - num_val
print('Train on {} samples, validate on {} samples, with batch size {}.'.
format(num_train, num_val, batch_size))
history = model.fit_generator(
generator=data_generator(lines[:num_train], batch_size, input_shape,
anchors, num_classes),
steps_per_epoch=max(1, num_train // batch_size),
# callbacks=[logging, checkpoint, reduce_lr, early_stopping],
validation_data=data_generator(lines[num_train:], batch_size,
input_shape, anchors, num_classes),
validation_steps=max(1, num_val // batch_size),
epochs=iterations)
# 绘制训练 & 验证的准确率值
# print(history.history.keys())
# plt.plot(history.history['acc'])
# plt.plot(history.history['val_acc'])
# plt.title('Model accuracy')
# plt.ylabel('Accuracy')
# plt.xlabel('Epoch')
# plt.legend(['Train', 'Test'], loc='upper left')
# plt.show()
# 绘制训练 & 验证的损失值
# plt.plot(history.history['loss'])
# plt.plot(history.history['val_loss'])
# plt.title('Model loss')
# plt.ylabel('Loss')
# plt.xlabel('Epoch')
# plt.legend(['Train', 'Test'], loc='upper left')
# plt.show()
# plot_model(model, to_file='model.png')
model.save_weights(log_dir)
print('model has been trained!\n')