def predict(model_name, model_file_name, layers, input_features, target_size):
img_width=input_features.shape[1]
img_height=input_features.shape[2]
input_features = input_features.reshape(len(input_features), len(input_features[0].flatten()))
# Restore the well-trained model
if model_name == 'dbn':
layers = map(int, layers.strip().split(','))
layers = [input_features.shape[1]] + layers + [target_size]
network = dbn.DBN(layers=layers, batch_size=100)
elif model_name == 'cnn':
conv_layers, hid_layers = layers.strip().split('#')
conv_layers = map(int, conv_layers.strip().split(','))
hid_layers = map(int, hid_layers.strip().split(','))
network = cnn.CNN(img_width=img_width, img_height=img_height, conv_layers=conv_layers, hidden_layers=hid_layers, batch_size=128)
else:
return -1, 'Invalid model'
with tf.Session() as sess:
tf_saver = tf.train.Saver()
tf_saver.restore(sess, model_file_path + model_file_name)
outputs = network.get_output(sess, input_features)
return 0, outputs
is_binary = True
classes = 2
optimizer = 'adam'
dropout_rate = 0.25
kwargs = {
'validation_steps': validation_steps,
'weights_file': weights_file,
'json_file': json_file,
'text_file': text_file,
'image_file': image_file,
'test_path': test_path,
'train_path': train_path,
'input_shape': input_shape,
'target_size': target_size,
'is_binary': is_binary,
'classes': classes,
'pool_size': pool_size,
'kernel_size': kernel_size,
'epochs': epochs,
'batch_size': batch_size,
'steps_per_epoch': steps_per_epoch,
'optimizer': optimizer,
'dropout_rate': dropout_rate
}
classifier = cnn.CNN(**kwargs)
classifier.create_model()
classifier.train_model()
classifier.export_model()
print 'Create an instance of the neural network.'
if model == 'dbn':
layers = map(int, layers.strip().split(','))
layers = [features.shape[1]] + layers + [labels.shape[1]]
network = dbn.DBN(layers=layers,
iters=1000,
batch_size=100,
mu=LEARNING_RATE) #.0001)
elif model == 'cnn':
conv_layers, hid_layers = layers.strip().split('#')
conv_layers = map(int, conv_layers.strip().split(','))
hid_layers = map(int, hid_layers.strip().split(','))
network = cnn.CNN(img_width=img_width,
img_height=img_height,
conv_layers=conv_layers,
hidden_layers=hid_layers,
learning_rate=LEARNING_RATE,
training_iters=20000,
batch_size=128,
display_step=10)
with tf.Session() as sess:
if pretrained != '-1':
tf_saver = tf.train.Saver()
tf_saver.restore(sess, model_path + pretrained)
print 'Start training...'
network.train(sess,
training_features,
training_labels,
testing_features,
testing_labels,
import os
import torch
import torch.nn as nn
import sklearn
from utils import evaluate
from sklearn.metrics import *
from plots import plot_learning_curves
from model import cnn
from loader import custom_data_loader
model = cnn.CNN()
# model.load_state_dict(torch.load("../output/cnn.pth"))
# model.load_state_dict(checkpoint['model_state_dict'])
# torch.save(model, os.path.join(PATH_OUTPUT, 'cnn.pth'))
PATH_TEST_FILE = "../data/test/"
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
test_loader = custom_data_loader.XrayLoader(PATH_TEST_FILE)
criterion = nn.CrossEntropyLoss()
criterion.to(device)
best_model = torch.load(os.path.join("../output/", 'cnn.pth'))
_, _, test_results = evaluate(model, device, test_loader, criterion)
roc = 0.0
y1, y2 = zip(*test_results)
format='%(asctime)s - %(message)s',
level=logging.INFO,
)
logging.info('Data downloading')
transform = transforms.Compose(
[transforms.ToTensor(),
transforms.Normalize((0.1307, ), (0.3081, ))])
train_dataset = datasets.MNIST(args.data_dir,
train=True,
download=True,
transform=transform)
test_dataset = datasets.MNIST(args.data_dir,
train=False,
transform=transform)
train_loader = DataLoader(train_dataset,
batch_size=args.batch_size,
shuffle=True)
test_loader = DataLoader(test_dataset,
batch_size=args.test_batch_size,
shuffle=True)
device = torch.device('cuda:0' if torch.cuda.is_available() else 'cpu')
model = cnn.CNN().to(device)
criterion = nn.CrossEntropyLoss()
optimizer = torch.optim.SGD(model.parameters(), lr=args.lr)
for epoch in range(args.epochs):
train(model, device, train_loader, criterion, optimizer, epoch)
test(model, device, test_loader, criterion)
def train_model(type, dataset, path):
torch.manual_seed(0)
if torch.cuda.is_available():
torch.cuda.manual_seed(0)
# Set a correct path to the seizure data file you downloaded
PATH_TRAIN_FILE = path + "/data/train/"
PATH_VALID_FILE = path + "/data/validation/"
# PATH_TEST_FILE = "../data/test/"
# Path for saving model
# PATH_OUTPUT = "../output/"
# os.makedirs(PATH_OUTPUT, exist_ok=True)
# Some parameters
NUM_EPOCHS = 1
BATCH_SIZE = 8
USE_CUDA = True # Set 'True' if you want to use GPU
NUM_WORKERS = 0 # Number of threads used by DataLoader. You can adjust this according to your machine spec.
NEGATIVE_BATCH_SIZE = 50
POSITIVE_BATCH_SIZE = 4
TOTAL = NEGATIVE_BATCH_SIZE + POSITIVE_BATCH_SIZE
if "original" != dataset and type == "additive_augmentation":
POSITIVE_BATCH_SIZE = POSITIVE_BATCH_SIZE * 2
weights = [(float(POSITIVE_BATCH_SIZE) / TOTAL),(float(NEGATIVE_BATCH_SIZE) / TOTAL)]
model = cnn.CNN()
# print("saving " + path + " " + dataset)
# torch.save(model, path + "/output/" + model_type + "_" + dataset + ".pth")
train_loader = custom_data_loader.XrayLoader(PATH_TRAIN_FILE,
dataset=dataset,
augmentation=type,
negative_batch_size=NEGATIVE_BATCH_SIZE,
positive_batch_size=POSITIVE_BATCH_SIZE)
valid_loader = custom_data_loader.XrayLoader(PATH_VALID_FILE,
negative_batch_size=NEGATIVE_BATCH_SIZE,
positive_batch_size=POSITIVE_BATCH_SIZE)
# test_loader = custom_data_loader.XrayLoader(PATH_TEST_FILE)
class_weights = torch.FloatTensor(weights)
criterion = nn.CrossEntropyLoss(weight=class_weights)
# criterion = nn.BCEWithLogitsLoss(weight=class_weights)
# BCELoss
optimizer = optim.Adam(model.parameters())
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
# device = "cpu"
model.to(device)
criterion.to(device)
best_val_acc = 0.0
train_losses, train_accuracies = [], []
valid_losses, valid_accuracies = [], []
best_roc = 0.0
roc_list = []
total_train = 0.0
total_load = 0.0
avg_batch_train_time = 0.0
avg_batch_load_time = 0.0
index = 0
for epoch in range(NUM_EPOCHS):
index += 1
train_loader.reset()
valid_loader.reset()
_, _, tt, tl, avg_tt, avg_lt = train(model, device, train_loader, criterion, optimizer, epoch)
valid_loss, valid_accuracy, valid_results = evaluate(model, device, valid_loader, criterion)
total_train += tt
total_load += tl
avg_batch_train_time += avg_tt
avg_batch_load_time += avg_lt
roc = 0.0
y1, y2 = zip(*valid_results)
try:
roc = sklearn.metrics.roc_auc_score(y1, y2)
except:
print("exception")
roc_list.append(roc)
print("roc: " + str(roc))
if roc > best_roc:
best_roc = roc
# torch.save(model, os.path.join(PATH_OUTPUT, 'cnn.pth'))
print("saving " + type + " " + dataset)
path_to_save = path + "/output/" + type + "/cnn" + "_" + dataset
os.makedirs(path_to_save, exist_ok=True)
torch.save(model, path_to_save + ".pth")
avg_batch_train_time = avg_batch_train_time / index
avg_batch_load_time = avg_batch_load_time / index
return best_roc, roc_list, total_train, total_load, avg_batch_train_time, avg_batch_load_time
