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train_S1.py
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train_S1.py
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import argparse, sys, os, cv2
import numpy as np
print(" ".join(sys.argv))
parser = argparse.ArgumentParser()
parser.add_argument('--model', type=str, default='BridgeNet') #['BridgeNet' or 'AHDR', 'WE', 'Resnet']
parser.add_argument('--resume_weights_loc', type=str, default=None)
parser.add_argument('--starting_epoch', type=int, default=0)
parser.add_argument('--num_static', type=int, default=5) # Use None for using all
parser.add_argument('--num_SCL_dynamic', type=int, default=64) # Use None for using all, except the supervised samples
parser.add_argument('--num_supervised_dynamic', type=int, default=5)
parser.add_argument('--dataset', type=str, default='SIG17') #['SIG17' or 'ICCP19']
parser.add_argument('--image_type', type=str, default='flow_corrected') #['normal' or 'flow_corrected']
parser.add_argument('--gpu_num', type=str, default='0')
parser.add_argument('--rtx_mixed_precision', action='store_true')
parser.add_argument('--model_name', type=str, default=None)
parser.add_argument('--epochs', type=int, default=75)
parser.add_argument('--batch_size', type=int, default=4)
parser.add_argument('--steps_per_batch', type=int, default=5000)
parser.add_argument('--optimizer', type=str, default='adam')
parser.add_argument('--momentum', type=float, default=0.9)
parser.add_argument('--nesterov', type=bool, default=True)
parser.add_argument('--amsgrad', type=bool, default=False)
parser.add_argument('--start_lr', type=float, default=1e-4)
parser.add_argument('--decay_steps', type=int, default=10)
parser.add_argument('--decay_rate', type=float, default=0.75)
parser.add_argument('--alpha', type=float, default=0.5)
parser.add_argument('--alpha_inc_steps', type=int, default=10)
parser.add_argument('--alpha_inc_rate', type=float, default=0.1)
parser.add_argument('--val_downsample', type=int, default=2)
parser.add_argument('--save_val_results', action='store_true')
args = parser.parse_args()
if args.model not in ['BridgeNet', 'AHDR', 'WE', 'Resnet']:
print("Unknown Model. Exiting.")
exit()
else:
print("Using {} model".format(args.model))
if args.dataset not in ['SIG17', 'ICCP19']:
print("Unknown Dataset. Exiting.")
exit()
else:
print("Using {} dataset".format(args.dataset))
if args.image_type not in ['normal', 'flow_corrected']:
print("Unknown Image Type. Exiting.")
exit()
else:
print("Using {} images".format(args.image_type))
if args.num_static < 0 or args.num_SCL_dynamic < 0 or args.num_supervised_dynamic < 0:
print("Provide positive numbers for each training set. Exiting.")
exit()
print("Using {} labeled dynamic samples, {} unlabeled dynamic samples, and {} labeled static samples for Stage 1 Training".format(
args.num_supervised_dynamic, args.num_SCL_dynamic, args.num_static))
os.environ['CUDA_VISIBLE_DEVICES'] = args.gpu_num
os.environ['TF_CPP_MIN_LOG_LEVEL'] = '2'
import tensorflow as tf
gpu_devices = tf.config.experimental.list_physical_devices('GPU')
tf.config.experimental.set_memory_growth(gpu_devices[0], True)
if args.rtx_mixed_precision:
from tensorflow.keras.mixed_precision import experimental as mixed_precision
policy = mixed_precision.Policy('mixed_float16')
mixed_precision.set_policy(policy)
from dataloader import *
from models import *
from losses import *
from utils import *
model_name = args.model if args.model_name is None else args.model_name
model = models[args.model](name=model_name)
if not os.path.exists('results'):
os.mkdir('results')
if not os.path.exists(os.path.join('results', model_name)):
os.mkdir(os.path.join('results', model_name))
if not os.path.exists(os.path.join('results', model_name, 'stage1')):
os.mkdir(os.path.join('results', model_name, 'stage1'))
if args.resume_weights_loc is not None:
print("Loading model weights from ", args.resume_weights_loc)
model.load_weights(args.resume_weights_loc)
epoch = args.starting_epoch
lr = args.start_lr
alpha = args.alpha
steps = args.steps_per_batch
def schd():
return lr
optimizers = {'adam': tf.keras.optimizers.Adam(schd, amsgrad=args.amsgrad),
'sgd': tf.keras.optimizers.SGD(schd, momentum=args.momentum, nesterov=args.nesterov),
'nadam': tf.keras.optimizers.Nadam(schd),
'adadelta': tf.keras.optimizers.Adadelta(schd),
'rmsprop': tf.keras.optimizers.RMSprop(schd, momentum=args.momentum)}
opt = optimizers[args.optimizer]
if args.rtx_mixed_precision:
opt = mixed_precision.LossScaleOptimizer(opt, loss_scale='dynamic')
losses = [MSE_TM]
metrics = [PSNR_L, PSNR_T]
init_sequences_S1(dataset=args.dataset, image_type=args.image_type)
init_validation()
if args.num_supervised_dynamic != 0:
if not os.path.exists(os.path.join('results', model_name, 'labeled_keys.txt')):
choice_dict = unique_exposures(dataset=args.dataset)
keys = []
for i in range(args.num_supervised_dynamic):
dict_key = list(choice_dict.keys())[i % len(choice_dict.keys())]
sampled_key = np.random.choice(choice_dict[dict_key])
choice_dict[dict_key].remove(sampled_key)
if len(choice_dict[dict_key]) == 0:
choice_dict.pop(dict_key)
keys.append(sampled_key)
print("Randomly selected labeled dynamic samples: ", keys)
key_file = open(os.path.join('results', model_name, 'labeled_keys.txt'), 'w')
for key in keys:
key_file.write(key)
key_file.write('\n')
key_file.close()
else:
keys = [line.strip() for line in open(os.path.join('results', model_name, 'labeled_keys.txt'))]
print("Loaded from file labeled dynamic samples: ", keys)
L_loader = Training_Loader(batch_size=args.batch_size, keys=keys, patch_size=64, static=False)
L_seq = tf.keras.utils.OrderedEnqueuer(L_loader, use_multiprocessing=False, shuffle=True)
L_keys = [x.strip().split('/')[-1] for x in keys]
_L_keys = keys
else:
L_keys = []
_L_keys = []
if args.num_static != 0:
if os.path.exists(os.path.join('results', model_name, 'static_keys.txt')):
keys = [line.strip() for line in open(os.path.join('results', model_name, 'static_keys.txt'))]
print("Loaded from file static samples: ", keys)
elif args.num_static is None:
keys = train_static_paths.keys()
print("Using all static samples.")
else:
choice_dict = unique_exposures(dataset=args.dataset, static=True)
keys = []
i = 0
while i < args.num_static:
dict_key = list(choice_dict.keys())[i % len(choice_dict.keys())]
sampled_key = np.random.choice(choice_dict[dict_key])
cur = sampled_key.strip().split('/')[-1]
if cur in L_keys:
continue
choice_dict[dict_key].remove(sampled_key)
if len(choice_dict[dict_key]) == 0:
choice_dict.pop(dict_key)
keys.append(sampled_key)
i += 1
key_file = open(os.path.join('results', model_name, 'static_keys.txt'), 'w')
for key in keys:
key_file.write(key)
key_file.write('\n')
key_file.close()
print("Randomly selected static samples: ", keys)
S_loader = Training_Loader(args.batch_size, keys=keys, patch_size=64, static=True)
S_seq = tf.keras.utils.OrderedEnqueuer(S_loader, use_multiprocessing=False, shuffle=True)
S_keys = [x.strip().split('/')[-1] for x in keys]
else:
S_keys = []
if args.num_SCL_dynamic != 0:
total = args.num_SCL_dynamic + len(S_keys) + len(L_keys)
if os.path.exists(os.path.join('results', model_name, 'unlabeled_keys.txt')):
keys = [line.strip() for line in open(os.path.join('results', model_name, 'unlabeled_keys.txt'))]
print("Loaded from file unlabeled dynamic samples: ", keys)
elif args.num_SCL_dynamic is None:
keys = [x for x in train_dynamic_paths.keys() if x not in _L_keys]
print("Using all samples except supervised, as unlabeled dynamic samples.")
elif (total==74 and args.dataset=='SIG17') or (total==466 and args.dataset=='ICCP19'):
if args.dataset == 'SIG17':
all = ['{:03d}'.format(x) for x in range(1, 75)]
else:
all = ['{:03d}'.format(x) for x in range(1, 467)]
all_but_L = [x for x in all if x not in L_keys]
keys = [paths[args.dataset] + '/train/'+ x for x in all_but_L if x not in S_keys]
print("Randomly selected unlabeled dynamic samples: ", keys)
else:
choice_dict = unique_exposures(dataset=args.dataset)
keys = []
i = 0
print(choice_dict.keys())
exit()
while i < args.num_SCL_dynamic:
dict_key = list(choice_dict.keys())[i % len(choice_dict.keys())]
sampled_key = np.random.choice(choice_dict[dict_key])
cur = sampled_key.strip().split('/')[-1]
if cur in L_keys or cur in S_keys:
print("looping")
continue
choice_dict[dict_key].remove(sampled_key)
if len(choice_dict[dict_key]) == 0:
choice_dict.pop(dict_key)
keys.append(sampled_key)
i += 1
print("Randomly selected unlabeled dynamic samples: ", keys)
key_file = open(os.path.join('results', model_name, 'unlabeled_keys.txt'), 'w')
for key in keys:
key_file.write(key)
key_file.write('\n')
key_file.close()
U_loader = Training_Loader(batch_size=args.batch_size, keys=keys, patch_size=64, static=False)
U_seq = tf.keras.utils.OrderedEnqueuer(U_loader, use_multiprocessing=False, shuffle=True)
U_keys = [x.strip().split('/')[-1] for x in keys]
else:
U_keys = []
val_loader = Validation()
def validate(epoch):
print("\nValidation - Epoch ", epoch)
progbar = tf.keras.utils.Progbar(len(val_loader))
step = 1
if not os.path.exists(os.path.join('results', model_name, 'stage1', str(epoch))):
os.makedirs(os.path.join('results', model_name, 'stage1', str(epoch)))
model.save_weights(os.path.join('results', model_name, 'stage1', str(epoch), model_name + '.tf'))
for i in range(len(val_loader)):
metric_vals = []
loss_vals = []
X, Y, exp = val_loader[i]
if args.model == 'Resnet':
div = 16
X = X[:, :X.shape[1] - X.shape[1]%div, :X.shape[2] - X.shape[2]%div, :]
Y = Y[:, :Y.shape[1] - Y.shape[1]%div, :Y.shape[2] - Y.shape[2]%div, :]
if args.val_downsample > 1:
inp = tf.image.resize(X, (X.shape[1] // args.val_downsample, X.shape[2] // args.val_downsample))
Y = tf.image.resize(Y, (Y.shape[1] // args.val_downsample, Y.shape[2] // args.val_downsample))
else:
inp = X
pred = model.predict(inp)
for l in losses:
_loss = tf.reduce_mean(l(Y, pred))
loss_vals.append((l.__name__.lower(), _loss))
for m in metrics:
_metric = tf.reduce_mean(m(Y, pred))
metric_vals.append((m.__name__.lower(), tf.reduce_mean(_metric)))
if args.save_val_results and epoch % 10 == 0:
os.makedirs(os.path.join('results', model_name, 'stage1', str(epoch), str(i)))
radiance_writer(os.path.join('results', model_name, 'stage1', str(epoch), str(i), str(i) + '.hdr'),
np.squeeze(pred, axis=0).astype(np.float32))
radiance_writer(os.path.join('results', model_name, 'stage1', str(epoch), str(i), str(i) + '_gt.hdr'),
np.squeeze(Y, axis=0).astype(np.float32))
progbar.update(step, loss_vals + metric_vals)
step += 1
print("Stage 1 Training Begins")
if args.num_static > 0:
S_seq.start(workers=4, max_queue_size=8)
S_gen = S_seq.get()
if args.num_supervised_dynamic > 0:
L_seq.start(workers=4, max_queue_size=8)
L_gen = L_seq.get()
if args.num_SCL_dynamic > 0:
U_seq.start(workers=4, max_queue_size=8)
U_gen = U_seq.get()
while epoch < args.epochs:
if (epoch + 1) % args.decay_steps == 0:
lr = lr * args.decay_rate
if (epoch + 1) % args.alpha_inc_steps == 0:
alpha = alpha + args.alpha_inc_rate
print("\nTraining - Epoch ", epoch, " | Learning rate = ", schd())
step = 1
progbar = tf.keras.utils.Progbar(steps)
for i in range(steps):
loss_vals = []
metric_vals = []
if args.num_static + args.num_supervised_dynamic > 0:
if args.num_static > 0 and args.num_supervised_dynamic > 0:
gen = np.random.choice([S_gen, L_gen])
elif args.num_supervised_dynamic > 0:
gen = L_gen
else:
gen = S_gen
# X_sup, Y_sup, exp_sup = S_loader[0]
# X_sup, Y_sup, exp_sup = L_gen[0]
# exit()
X_sup, Y_sup, exp_sup = next(gen)
if args.num_SCL_dynamic > 0:
X_SCL, Y_SCL, exp_SCL = next(U_gen)
X = tf.concat([X_sup, X_SCL], axis=0)
Y = tf.concat([Y_sup, Y_SCL], axis=0)
else:
X = X_sup
Y = Y_sup
with tf.GradientTape() as tape:
loss = 0
pred = model(X)
for l in losses:
_loss = tf.reduce_mean(l(Y[:args.batch_size], pred[:args.batch_size]))
loss_vals.append((l.__name__.lower(), _loss))
loss += _loss
if args.num_SCL_dynamic > 0:
SCL_pred = pred[args.batch_size:, :, :, :]
_loss = ME_SCL(X_SCL[:, :, :, 6:9], SCL_pred, exp_SCL[1])
loss_vals.append(('scl_loss', _loss))
loss += alpha * _loss
if args.rtx_mixed_precision:
scaled_loss = opt.get_scaled_loss(loss)
scaled_gradients = tape.gradient(scaled_loss, model.trainable_variables)
grads = opt.get_unscaled_gradients(scaled_gradients)
else:
grads = tape.gradient(loss, model.trainable_variables)
else:
X_SCL, Y_SCL, exp_SCL = next(U_gen)
loss_vals = []
metric_vals = []
with tf.GradientTape() as tape:
loss = 0
pred = model(X_SCL)
_loss = ME_SCL(X_SCL[:, :, :, 6:9], pred, exp_SCL[1])
loss_vals.append(('scl_loss', _loss))
loss += _loss
if args.rtx_mixed_precision:
scaled_loss = opt.get_scaled_loss(loss)
scaled_gradients = tape.gradient(scaled_loss, model.trainable_variables)
grads = opt.get_unscaled_gradients(scaled_gradients)
else:
grads = tape.gradient(loss, model.trainable_variables)
opt.apply_gradients(zip(grads, model.trainable_variables))
for m in metrics:
_metric = tf.reduce_mean(m(Y, pred))
metric_vals.append((m.__name__.lower(), _metric))
loss_vals = [(str(k), v.numpy()) for k, v in loss_vals]
metric_vals = [(str(k), v.numpy()) for k, v in metric_vals]
progbar.update(step, loss_vals + metric_vals)
step += 1
validate(epoch)
epoch += 1
L_seq.stop()
U_seq.stop()
S_seq.stop()