def train(args):
logger.auto_set_dir()
os.environ['CUDA_VISIBLE_DEVICES'] = '3'
# Setup Augmentations
data_aug = Compose([RandomRotate(10), RandomHorizontallyFlip()])
# Setup Dataloader
data_loader = get_loader(args.dataset)
data_path = get_data_path(args.dataset)
t_loader = data_loader(data_path,
is_transform=True,
img_size=(args.img_rows, args.img_cols),
epoch_scale=4,
augmentations=data_aug,
img_norm=args.img_norm)
v_loader = data_loader(data_path,
is_transform=True,
split='val',
img_size=(args.img_rows, args.img_cols),
img_norm=args.img_norm)
n_classes = t_loader.n_classes
trainloader = data.DataLoader(t_loader,
batch_size=args.batch_size,
num_workers=8,
shuffle=True)
valloader = data.DataLoader(v_loader,
batch_size=args.batch_size,
num_workers=8)
# Setup Metrics
running_metrics = runningScore(n_classes)
# Setup Model
from model_zoo.deeplabv1 import VGG16_LargeFoV
model = VGG16_LargeFoV(class_num=n_classes,
image_size=[args.img_cols, args.img_rows],
pretrained=True)
#model = torch.nn.DataParallel(model, device_ids=range(torch.cuda.device_count()))
model.cuda()
# Check if model has custom optimizer / loss
if hasattr(model, 'optimizer'):
logger.warn("don't have customzed optimizer, use default setting!")
optimizer = model.module.optimizer
else:
optimizer = torch.optim.SGD(model.parameters(),
lr=args.l_rate,
momentum=0.99,
weight_decay=5e-4)
optimizer_summary(optimizer)
if args.resume is not None:
if os.path.isfile(args.resume):
logger.info(
"Loading model and optimizer from checkpoint '{}'".format(
args.resume))
checkpoint = torch.load(args.resume)
model.load_state_dict(checkpoint['model_state'])
optimizer.load_state_dict(checkpoint['optimizer_state'])
logger.info("Loaded checkpoint '{}' (epoch {})".format(
args.resume, checkpoint['epoch']))
else:
logger.info("No checkpoint found at '{}'".format(args.resume))
best_iou = -100.0
for epoch in tqdm(range(args.n_epoch), total=args.n_epoch):
model.train()
for i, (images, labels) in tqdm(enumerate(trainloader),
total=len(trainloader),
desc="training epoch {}/{}".format(
epoch, args.n_epoch)):
cur_iter = i + epoch * len(trainloader)
cur_lr = adjust_learning_rate(optimizer,
args.l_rate,
cur_iter,
args.n_epoch * len(trainloader),
power=0.9)
#if i > 10:break
images = Variable(images.cuda())
labels = Variable(labels.cuda())
optimizer.zero_grad()
outputs = model(images)
#print(np.unique(outputs.data[0].cpu().numpy()))
loss = CrossEntropyLoss2d_Seg(input=outputs,
target=labels,
class_num=n_classes)
loss.backward()
optimizer.step()
if (i + 1) % 100 == 0:
logger.info("Epoch [%d/%d] Loss: %.4f, lr: %.7f" %
(epoch + 1, args.n_epoch, loss.data[0], cur_lr))
model.eval()
for i_val, (images_val, labels_val) in tqdm(enumerate(valloader),
total=len(valloader),
desc="validation"):
images_val = Variable(images_val.cuda(), volatile=True)
labels_val = Variable(labels_val.cuda(), volatile=True)
outputs = model(images_val)
pred = outputs.data.max(1)[1].cpu().numpy()
gt = labels_val.data.cpu().numpy()
running_metrics.update(gt, pred)
score, class_iou = running_metrics.get_scores()
for k, v in score.items():
logger.info("{}: {}".format(k, v))
running_metrics.reset()
if score['Mean IoU : \t'] >= best_iou:
best_iou = score['Mean IoU : \t']
state = {
'epoch': epoch + 1,
'mIoU': best_iou,
'model_state': model.state_dict(),
'optimizer_state': optimizer.state_dict(),
}
torch.save(state,
os.path.join(logger.get_logger_dir(), "best_model.pkl"))
def train(args):
logger.auto_set_dir()
from pytorchgo.utils.pytorch_utils import set_gpu
set_gpu(args.gpu)
# Setup Dataloader
from pytorchgo.augmentation.segmentation import SubtractMeans, PIL2NP, RGB2BGR, PIL_Scale, Value255to0, ToLabel
from torchvision.transforms import Compose, Normalize, ToTensor
img_transform = Compose([ # notice the order!!!
PIL_Scale(train_img_shape, Image.BILINEAR),
PIL2NP(),
RGB2BGR(),
SubtractMeans(),
ToTensor(),
])
label_transform = Compose([
PIL_Scale(train_img_shape, Image.NEAREST),
PIL2NP(),
Value255to0(),
ToLabel()
])
val_img_transform = Compose([
PIL_Scale(train_img_shape, Image.BILINEAR),
PIL2NP(),
RGB2BGR(),
SubtractMeans(),
ToTensor(),
])
val_label_transform = Compose([
PIL_Scale(train_img_shape, Image.NEAREST),
PIL2NP(),
ToLabel(),
# notice here, training, validation size difference, this is very tricky.
])
from pytorchgo.dataloader.pascal_voc_loader import pascalVOCLoader as common_voc_loader
train_loader = common_voc_loader(split="train_aug",
epoch_scale=1,
img_transform=img_transform,
label_transform=label_transform)
validation_loader = common_voc_loader(split='val',
img_transform=val_img_transform,
label_transform=val_label_transform)
n_classes = train_loader.n_classes
trainloader = data.DataLoader(train_loader,
batch_size=args.batch_size,
num_workers=8,
shuffle=True)
valloader = data.DataLoader(validation_loader,
batch_size=args.batch_size,
num_workers=8)
# Setup Metrics
running_metrics = runningScore(n_classes)
# Setup Model
from pytorchgo.model.deeplabv1 import VGG16_LargeFoV
from pytorchgo.model.deeplab_resnet import Res_Deeplab
model = Res_Deeplab(NoLabels=n_classes, pretrained=True, output_all=False)
from pytorchgo.utils.pytorch_utils import model_summary, optimizer_summary
model_summary(model)
def get_validation_miou(model):
model.eval()
for i_val, (images_val, labels_val) in tqdm(enumerate(valloader),
total=len(valloader),
desc="validation"):
if i_val > 5 and is_debug == 1: break
if i_val > 200 and is_debug == 2: break
#img_large = torch.Tensor(np.zeros((1, 3, 513, 513)))
#img_large[:, :, :images_val.shape[2], :images_val.shape[3]] = images_val
output = model(Variable(images_val, volatile=True).cuda())
output = output
pred = output.data.max(1)[1].cpu().numpy()
#pred = output[:, :images_val.shape[2], :images_val.shape[3]]
gt = labels_val.numpy()
running_metrics.update(gt, pred)
score, class_iou = running_metrics.get_scores()
for k, v in score.items():
logger.info("{}: {}".format(k, v))
running_metrics.reset()
return score['Mean IoU : \t']
model.cuda()
# Check if model has custom optimizer / loss
if hasattr(model, 'optimizer'):
logger.warn("don't have customzed optimizer, use default setting!")
optimizer = model.module.optimizer
else:
optimizer = torch.optim.SGD(model.optimizer_params(args.l_rate),
lr=args.l_rate,
momentum=0.99,
weight_decay=5e-4)
optimizer_summary(optimizer)
if args.resume is not None:
if os.path.isfile(args.resume):
logger.info(
"Loading model and optimizer from checkpoint '{}'".format(
args.resume))
checkpoint = torch.load(args.resume)
model.load_state_dict(checkpoint['model_state'])
optimizer.load_state_dict(checkpoint['optimizer_state'])
logger.info("Loaded checkpoint '{}' (epoch {})".format(
args.resume, checkpoint['epoch']))
else:
logger.info("No checkpoint found at '{}'".format(args.resume))
best_iou = 0
logger.info('start!!')
for epoch in tqdm(range(args.n_epoch), total=args.n_epoch):
model.train()
for i, (images, labels) in tqdm(enumerate(trainloader),
total=len(trainloader),
desc="training epoch {}/{}".format(
epoch, args.n_epoch)):
if i > 10 and is_debug == 1: break
if i > 200 and is_debug == 2: break
cur_iter = i + epoch * len(trainloader)
cur_lr = adjust_learning_rate(optimizer,
args.l_rate,
cur_iter,
args.n_epoch * len(trainloader),
power=0.9)
images = Variable(images.cuda())
labels = Variable(labels.cuda())
optimizer.zero_grad()
outputs = model(images) # use fusion score
loss = CrossEntropyLoss2d_Seg(input=outputs,
target=labels,
class_num=n_classes)
#for i in range(len(outputs) - 1):
#for i in range(1):
# loss = loss + CrossEntropyLoss2d_Seg(input=outputs[i], target=labels, class_num=n_classes)
loss.backward()
optimizer.step()
if (i + 1) % 100 == 0:
logger.info(
"Epoch [%d/%d] Loss: %.4f, lr: %.7f, best mIoU: %.7f" %
(epoch + 1, args.n_epoch, loss.data[0], cur_lr, best_iou))
cur_miou = get_validation_miou(model)
if cur_miou >= best_iou:
best_iou = cur_miou
state = {
'epoch': epoch + 1,
'mIoU': best_iou,
'model_state': model.state_dict(),
'optimizer_state': optimizer.state_dict(),
}
torch.save(state,
os.path.join(logger.get_logger_dir(), "best_model.pth"))