def __init__(self, opt, size, continious=0, binary=0):
super().__init__()
assert not binary
assert not continious
input_dim = opt.latent_dim + opt.code_dim
self.dense_block = nn.Sequential(
nn.Linear(input_dim, 512),
nn.BatchNorm1d(512),
nn.LeakyReLU(inplace=True),
nn.Linear(512, 512),
nn.BatchNorm1d(512),
nn.LeakyReLU(inplace=True),
nn.Linear(512, size),
)
self.binary = binary
self.continious = continious
self.degree = opt.degree
self.n_studies = opt.n_classes
self.poly_param = nn.Parameter(
torch.tensor(np.random.random(
(self.degree + 1, self.n_studies,
size - binary - continious)).astype(np.float32),
requires_grad=True))
init_weights(self)
def inference(X_test, X_mean, init_file, outdir):
bs = 128
fixed_bs = True
print('building model...')
l_out = model.build(bs, 10)
print('initializing weights from %s...' % (init_file))
network.init_weights(l_out, init_file)
test_iter = iter_funcs.create_iter_funcs_test(l_out, bs, N=50)
for test_idx in network.get_batch_idx(X_test.shape[0],
bs,
fixed=fixed_bs,
shuffle=False):
X_test_batch = X_test[test_idx]
y_hat = test_iter(X_test_batch)
# get the test images that were misclassified with low certainty
for X, y in zip(X_test_batch, y_hat):
if y.max() > 0.9:
# undo the initial transformations: shift, scale transpose
img = ((X + X_mean) * 255.).transpose(1, 2, 0)
fname = '-'.join('%.5f' % p for p in y)
cv2.imwrite(join(outdir, '%s.png' % fname), img)
def build_model(self):
"""Build our deep learning model."""
if self.model_type == 'U_Net':
self.unet = U_Net(img_ch=1,
output_ch=1,
first_layer_numKernel=self.first_layer_numKernel)
elif self.model_type == 'R2U_Net':
self.unet = R2U_Net(
img_ch=1,
output_ch=1,
t=self.t,
first_layer_numKernel=self.first_layer_numKernel)
elif self.model_type == 'AttU_Net':
self.unet = AttU_Net(
img_ch=1,
output_ch=1,
first_layer_numKernel=self.first_layer_numKernel)
elif self.model_type == 'R2AttU_Net':
self.unet = R2AttU_Net(
img_ch=1,
output_ch=1,
t=self.t,
first_layer_numKernel=self.first_layer_numKernel)
elif self.model_type == 'ResAttU_Net':
self.unet = ResAttU_Net(
UnetLayer=self.UnetLayer,
img_ch=1,
output_ch=1,
first_layer_numKernel=self.first_layer_numKernel)
if self.initialization != 'NA':
init_weights(self.unet, init_type=self.initialization)
self.unet.to(self.device)
def __init__(self, opt, size, continious=0, binary=0):
"""
Construct generator
Parameters
---------------
opt: argparse.Namespace
size: int
number of outputs
continious: int
number of continious outputs in the total of size output neurons
binary: int
number of binary outputs in the total of size output neurons
"""
super(Generator, self).__init__()
input_dim = opt.latent_dim + opt.n_classes + opt.code_dim
self.dense_block = nn.Sequential(
nn.Linear(input_dim, 512),
nn.BatchNorm1d(512),
nn.LeakyReLU(inplace=True),
nn.Linear(512, 512),
nn.BatchNorm1d(512),
nn.LeakyReLU(inplace=True),
nn.Linear(512, size),
)
self.binary = binary
self.continious = continious
init_weights(self)
def __init__(self, opt, size, continious=0, binary=0):
super().__init__()
assert not binary
self.dense_blocks = nn.Sequential(
nn.utils.spectral_norm(nn.Linear(size - binary, 512)),
nn.LeakyReLU(inplace=True),
nn.utils.spectral_norm(nn.Linear(512, 512)),
nn.LeakyReLU(inplace=True),
nn.utils.spectral_norm(nn.Linear(512, 512)),
nn.LeakyReLU(inplace=True),
)
# Output layers
self.adv_layer = nn.Sequential(nn.Linear(512, 1), nn.Sigmoid())
self.category_layer = nn.Sequential(nn.Linear(512, opt.n_classes))
tmp = (nn.Linear(512,
512), nn.LeakyReLU(), nn.Linear(512, opt.code_dim))
if opt.distribution == 'uniform':
tmp = tmp + (nn.Tanh(), )
self.latent_layer = nn.Sequential(*tmp)
self.binary = binary
if binary:
self.adv_layer = nn.Sequential(
nn.Linear(opt.code_dim + binary, 256), nn.LeakyReLU(),
nn.Linear(256, 256), nn.LeakyReLU(), nn.Linear(256, 1),
nn.Sigmoid())
init_weights(self)
def retrieveWeights(sess, filter_shape, layer_name):
conv1_weights = None
with tf.name_scope(layer_name):
with tf.variable_scope('weights', reuse=True):
weights = init_weights(filter_shape, layer_name)
conv1_weights = sess.run(weights)
return conv1_weights
def build_model(self, mode = 'normal'):
self.Encoder = DQNEncoder(input_size= self.num_slot + self.num_test)
self.SymptomDecoder = DQNSymptomDecoder(output_size=self.num_slot+2)
self.TestDecoder = DQNTestDecoder(output_size=self.num_test)
self.DiseaseDecoder = DQNDiseaseDecoder(output_size=self.num_disease)
self.AuxiliaryDecoder = DQNAuxiliaryDecoder(output_size = self.num_test + self.num_slot)
self.optimizer_para = list(self.Encoder.parameters()) + list(self.SymptomDecoder.parameters()) + list(self.TestDecoder.parameters()) + list(self.AuxiliaryDecoder.parameters())
self.optimizer = optim.Adam(self.optimizer_para, self.parameter['lr'])
self.device = torch.device('cuda:' + str(self.parameter['cuda_idx']) if torch.cuda.is_available() else 'cpu')
self.Encoder.to(self.device)
self.SymptomDecoder.to(self.device)
self.TestDecoder.to(self.device)
self.DiseaseDecoder.to(self.device)
self.AuxiliaryDecoder.to(self.device)
init_weights(self.Encoder, mode)
init_weights(self.SymptomDecoder, mode)
init_weights(self.TestDecoder, mode)
init_weights(self.DiseaseDecoder, mode)
init_weights(self.AuxiliaryDecoder, mode)
if self.load_model:
self.load(self.parameter['model_savepath'] + '/newest/')
def train(X_train,
X_valid,
y_train,
y_valid,
weights_file=None,
init_file=None):
# model parameters
wd = 0.0005
bs = 128
base_lr = 0.01
gamma = 0.0001
p = 0.75
mntm = 0.9
fixed_bs = True
mc_dropout = True
#mc_dropout = False
lr_update = lambda itr: base_lr * (1 + gamma * itr)**(-p)
snapshot_every = 5
max_epochs = 100000
print('building model...')
l_out = model.build(bs, np.unique(y_train).shape[0])
network.print_layers(l_out)
# check if we need to load pre-trained weights
if init_file is not None:
print('initializing weights from %s...' % (init_file))
network.init_weights(l_out, init_file)
else:
print('initializing weights randomly...')
# do theano stuff
print('creating shared variables...')
lr_shared = theano.shared(floatX(base_lr))
print('compiling theano functions...')
train_iter = iter_funcs.create_iter_funcs_train(l_out, base_lr, mntm, wd)
valid_iter = iter_funcs.create_iter_funcs_valid(l_out,
bs,
N=50,
mc_dropout=mc_dropout)
# prepare to start training
best_epoch = -1
best_train_losses_mean, best_valid_losses_mean = np.inf, np.inf
print('starting training at %s' % (network.get_current_time()))
epoch_train_losses, epoch_valid_losses = [], []
gradient_updates = 0
epochs = []
# start training
try:
for epoch in range(1, max_epochs + 1):
t_epoch_start = time()
train_losses, train_accs = [], []
# print run training for each batch
for train_idx in network.get_batch_idx(X_train.shape[0],
bs,
fixed=fixed_bs,
shuffle=True):
X_train_batch = X_train[train_idx]
y_train_batch = y_train[train_idx]
#print X_train_batch.shape, y_train_batch.shape
train_loss, train_acc = train_iter(X_train_batch,
y_train_batch)
#train_loss, train_acc = 0, 0
# learning rate policy
gradient_updates += 1
lr = lr_update(gradient_updates)
lr_shared.set_value(floatX(lr))
train_losses.append(train_loss)
train_accs.append(train_acc)
# run validation for each batch
valid_losses, valid_accs = [], []
for valid_idx in network.get_batch_idx(X_valid.shape[0],
bs,
fixed=fixed_bs,
shuffle=False):
X_valid_batch = X_valid[valid_idx]
y_valid_batch = y_valid[valid_idx]
#print X_valid_batch.shape, y_valid_batch.shape
valid_loss, valid_acc = valid_iter(X_valid_batch,
y_valid_batch)
#valid_loss, valid_acc = 0, 0
valid_losses.append(valid_loss)
valid_accs.append(valid_acc)
# average over the batches
train_losses_mean = np.mean(train_losses)
train_accs_mean = np.mean(train_accs)
valid_losses_mean = np.mean(valid_losses)
valid_accs_mean = np.mean(valid_accs)
epochs.append(epoch)
epoch_train_losses.append(train_losses_mean)
epoch_valid_losses.append(valid_losses_mean)
# display useful info
epoch_color = ('', '')
if valid_losses_mean < best_valid_losses_mean:
best_epoch = epoch
best_train_losses_mean = train_losses_mean
best_valid_losses_mean = valid_losses_mean
best_weights = layers.get_all_param_values(l_out)
epoch_color = ('\033[32m', '\033[0m')
t_epoch_end = time()
duration = t_epoch_end - t_epoch_start
print('{}{:>4}{} | {:>10.6f} | {:>10.6f} | '
'{:>3.2f}% | {:>3.2f}% | '
'{:>1.8} | {:>4.2f}s | '.format(
epoch_color[0], epoch, epoch_color[1], train_losses_mean,
valid_losses_mean, 100 * train_accs_mean,
100 * valid_accs_mean, lr, duration))
if (epoch % snapshot_every) == 0:
network.save_weights(best_weights, weights_file)
except KeyboardInterrupt:
print('caught ctrl-c... stopped training.')
# display final results and save weights
print('training finished at %s\n' % (network.get_current_time()))
print('best local minimum for validation data at epoch %d' % (best_epoch))
print(' train loss = %.6f' % (best_train_losses_mean))
print(' valid loss = %.6f' % (best_valid_losses_mean))
if best_weights is not None:
print('saving best weights to %s' % (weights_file))
network.save_weights(best_weights, weights_file)
# plot the train/val loss over epochs
print('plotting training/validation loss...')
plt.plot(epochs, epoch_train_losses, 'b')
plt.plot(epochs, epoch_valid_losses, 'g')
plt.legend(('training', 'validation'))
plt.ylabel('loss')
plt.xlabel('epochs')
plt.xlim((1, epochs[-1]))
train_val_log = join('logs', '%s.png' % network.get_current_time())
plt.savefig(train_val_log, bbox_inches='tight')
def train(self, model, train_loader, val_loader, num_epochs=10, log_nth=0):
"""
Train a given model with the provided data.
Inputs:
- model: object initialized from a torch.nn.Module
- train_loader: train data (currently using nonsense data)
- val_loader: val data (currently using nonsense data)
- num_epochs: total number of epochs
- log_nth: log training accuracy and loss every nth iteration
"""
optim = self.optim(model.parameters(), **self.optim_args)
self._reset_histories()
iter_per_epoch = len(train_loader)
init_weights(model, "xavier")
model.train()
print("START TRAIN")
start = time.time()
for epoch in range(num_epochs):
# Training
for i, (inputs, targets) in enumerate(train_loader, 1):
inputs, targets = inputs.cuda().to(dtype=torch.float), \
targets.cuda().to(dtype=torch.long)
optim.zero_grad()
outputs = model(inputs)
# print("Out: ", outputs.size())
loss = self.loss_func(outputs, targets)
loss.backward()
optim.step()
self.train_loss_history.append(loss.detach().cpu().numpy())
self.train_loss_history.append(loss.detach().cpu().numpy())
if log_nth and i % log_nth == 0:
last_log_nth_losses = self.train_loss_history[-log_nth:]
train_loss = np.mean(last_log_nth_losses)
print('[Iteration %d/%d] TRAIN loss: %.3f' %
(i + epoch * iter_per_epoch,
iter_per_epoch * num_epochs,
train_loss))
_, preds = torch.max(outputs, 1)
print("Preds: ", preds)
print("Targets: ", targets)
train_acc = np.mean((preds == targets).detach().cpu().numpy())
self.train_acc_history.append(train_acc)
if log_nth:
print('[Epoch %d/%d] TRAIN time/acc/loss/: %.3f/%.3f/%.3f' %
(epoch + 1, num_epochs, time.time() - start, train_acc, train_loss))
# Validation
val_losses = []
val_scores = []
model.eval()
for j, (inputs, targets) in enumerate(val_loader, 1):
inputs, targets = inputs.cuda().to(dtype=torch.float), \
targets.cuda().to(dtype=torch.long)
outputs = model(inputs)
loss = self.loss_func(outputs, targets)
val_losses.append(loss.detach().cpu().numpy())
_, preds = torch.max(outputs, 1)
scores = np.mean((preds == targets).detach().cpu().numpy())
val_scores.append(scores)
val_acc, val_loss = np.mean(val_scores), np.mean(val_losses)
if log_nth:
print('[Epoch %d/%d] VAL acc/loss: %.3f/%.3f' % (epoch + 1, num_epochs, val_acc, val_loss))
model.train()
#################################################################
end = time.time()
print("FINISH")
print("TIME ELAPSED: {0}".format(end - start))
batch_size=1,
pin_memory=True,
num_workers=4,
shuffle=False,
collate_fn=JAADCollateClassification)
if args.rgb:
i3d_rgb = I3D(num_classes=400, modality='rgb')
i3d_rgb.load_state_dict(torch.load(args.rgb_weights_path))
i3d_rgb.conv3d_0c_1x1 = Unit3Dpy(in_channels=1024 * 3,
out_channels=2,
kernel_size=(1, 1, 1),
activation=None,
use_bias=True,
use_bn=False)
init_weights(i3d_rgb.conv3d_0c_1x1)
i3d_rgb.cuda()
if args.flow:
i3d_flow = I3D(num_classes=400, modality='flow')
i3d_flow.load_state_dict(torch.load(args.flow_weights_path))
i3d_flow.conv3d_0c_1x1 = Unit3Dpy(in_channels=1024,
out_channels=2,
kernel_size=(1, 1, 1),
activation=None,
use_bias=True,
use_bn=False)
init_weights(i3d_flow.conv3d_0c_1x1)
i3d_flow.cuda()
optimizer = optim.Adam([{"params": i3d_rgb.parameters()}], lr=0.001)
for epoch in range(args.epoch):
def train(
X_train, X_valid, y_train, y_valid, weights_file=None, init_file=None):
# model parameters
wd = 0.0005
bs = 128
base_lr = 0.01
gamma = 0.0001
p = 0.75
mntm = 0.9
fixed_bs = True
mc_dropout = True
#mc_dropout = False
lr_update = lambda itr: base_lr * (1 + gamma * itr) ** (-p)
snapshot_every = 5
max_epochs = 100000
print('building model...')
l_out = model.build(bs, np.unique(y_train).shape[0])
network.print_layers(l_out)
# check if we need to load pre-trained weights
if init_file is not None:
print('initializing weights from %s...' % (init_file))
network.init_weights(l_out, init_file)
else:
print('initializing weights randomly...')
# do theano stuff
print('creating shared variables...')
lr_shared = theano.shared(floatX(base_lr))
print('compiling theano functions...')
train_iter = iter_funcs.create_iter_funcs_train(l_out, base_lr, mntm, wd)
valid_iter = iter_funcs.create_iter_funcs_valid(
l_out, bs, N=50, mc_dropout=mc_dropout)
# prepare to start training
best_epoch = -1
best_train_losses_mean, best_valid_losses_mean = np.inf, np.inf
print('starting training at %s' % (
network.get_current_time()))
epoch_train_losses, epoch_valid_losses = [], []
gradient_updates = 0
epochs = []
# start training
try:
for epoch in range(1, max_epochs + 1):
t_epoch_start = time()
train_losses, train_accs = [], []
# print run training for each batch
for train_idx in network.get_batch_idx(
X_train.shape[0], bs, fixed=fixed_bs, shuffle=True):
X_train_batch = X_train[train_idx]
y_train_batch = y_train[train_idx]
#print X_train_batch.shape, y_train_batch.shape
train_loss, train_acc = train_iter(
X_train_batch, y_train_batch)
#train_loss, train_acc = 0, 0
# learning rate policy
gradient_updates += 1
lr = lr_update(gradient_updates)
lr_shared.set_value(floatX(lr))
train_losses.append(train_loss)
train_accs.append(train_acc)
# run validation for each batch
valid_losses, valid_accs = [], []
for valid_idx in network.get_batch_idx(
X_valid.shape[0], bs, fixed=fixed_bs, shuffle=False):
X_valid_batch = X_valid[valid_idx]
y_valid_batch = y_valid[valid_idx]
#print X_valid_batch.shape, y_valid_batch.shape
valid_loss, valid_acc = valid_iter(
X_valid_batch, y_valid_batch)
#valid_loss, valid_acc = 0, 0
valid_losses.append(valid_loss)
valid_accs.append(valid_acc)
# average over the batches
train_losses_mean = np.mean(train_losses)
train_accs_mean = np.mean(train_accs)
valid_losses_mean = np.mean(valid_losses)
valid_accs_mean = np.mean(valid_accs)
epochs.append(epoch)
epoch_train_losses.append(train_losses_mean)
epoch_valid_losses.append(valid_losses_mean)
# display useful info
epoch_color = ('', '')
if valid_losses_mean < best_valid_losses_mean:
best_epoch = epoch
best_train_losses_mean = train_losses_mean
best_valid_losses_mean = valid_losses_mean
best_weights = layers.get_all_param_values(l_out)
epoch_color = ('\033[32m', '\033[0m')
t_epoch_end = time()
duration = t_epoch_end - t_epoch_start
print('{}{:>4}{} | {:>10.6f} | {:>10.6f} | '
'{:>3.2f}% | {:>3.2f}% | '
'{:>1.8} | {:>4.2f}s | '.format(
epoch_color[0], epoch, epoch_color[1],
train_losses_mean, valid_losses_mean,
100 * train_accs_mean, 100 * valid_accs_mean,
lr, duration))
if (epoch % snapshot_every) == 0:
network.save_weights(best_weights, weights_file)
except KeyboardInterrupt:
print('caught ctrl-c... stopped training.')
# display final results and save weights
print('training finished at %s\n' % (
network.get_current_time()))
print('best local minimum for validation data at epoch %d' % (
best_epoch))
print(' train loss = %.6f' % (
best_train_losses_mean))
print(' valid loss = %.6f' % (
best_valid_losses_mean))
if best_weights is not None:
print('saving best weights to %s' % (weights_file))
network.save_weights(best_weights, weights_file)
# plot the train/val loss over epochs
print('plotting training/validation loss...')
plt.plot(epochs, epoch_train_losses, 'b')
plt.plot(epochs, epoch_valid_losses, 'g')
plt.legend(('training', 'validation'))
plt.ylabel('loss')
plt.xlabel('epochs')
plt.xlim((1, epochs[-1]))
train_val_log = join('logs', '%s.png' % network.get_current_time())
plt.savefig(train_val_log, bbox_inches='tight')
