def main():
print("==========\nArgs:{}\n==========".format(opt))
train_data_dir = opt.train_data_dir
test_data_dir = opt.test_data_dir
name = opt.name
os.environ['CUDA_VISIBLE_DEVICES'] = opt.gpu_ids
use_gpu = torch.cuda.is_available()
if opt.use_cpu: use_gpu = False
if not opt.evaluate:
sys.stdout = Logger(osp.join(opt.save_dir, opt.train_log))
else:
sys.stdout = Logger(osp.join(opt.save_dir, opt.test_log))
if use_gpu:
print("Currently using GPU {}".format(opt.gpu_ids))
cudnn.benchmark = True
else:
print("Currently using CPU (GPU is highly recommended)")
#str_ids = opt.gpu_ids.split(',')
#gpu_ids = []
#for str_id in str_ids:
# gid = int(str_id)
# if gid >=0:
# gpu_ids.append(gid)
#
## set gpu ids
#if len(gpu_ids)>0:
# torch.cuda.set_device(gpu_ids[0])
#print(gpu_ids[0])
# Load train Data
# ---------
print("==========Preparing trian dataset========")
transform_train_list = [
# transforms.RandomResizedCrop(size=128, scale=(0.75,1.0), ratio=(0.75,1.3333), interpolation=3), #Image.BICUBIC)
transforms.Resize((288, 144), interpolation=3),
transforms.RandomCrop((256, 128)),
transforms.RandomHorizontalFlip(),
transforms.ToTensor(),
transforms.Normalize([0.485, 0.456, 0.406], [0.229, 0.224, 0.225])
]
if opt.PCB:
transform_train_list = [
transforms.Resize((384, 192), interpolation=3),
transforms.RandomHorizontalFlip(),
transforms.ToTensor(),
transforms.Normalize([0.485, 0.456, 0.406], [0.229, 0.224, 0.225])
]
if opt.erasing_p > 0:
transform_train_list = transform_train_list + [
RandomErasing(probability=opt.erasing_p, mean=[0.0, 0.0, 0.0])
]
if opt.color_jitter:
transform_train_list = [
transforms.ColorJitter(
brightness=0.1, contrast=0.1, saturation=0.1, hue=0)
] + transform_train_list
train_data_transforms = transforms.Compose(transform_train_list)
train_all = ''
if opt.train_all:
if opt.use_clean_imgs:
train_all = '_all_clean'
else:
train_all = '_all'
print("Using all the train images")
train_image_datasets = {}
train_image_datasets['train'] = datasets.ImageFolder(
os.path.join(train_data_dir, 'train' + train_all),
train_data_transforms)
train_dataloaders = {
x: torch.utils.data.DataLoader(train_image_datasets[x],
batch_size=opt.train_batch,
shuffle=True,
num_workers=4)
for x in ['train']
}
dataset_sizes = {x: len(train_image_datasets[x]) for x in ['train']}
class_names = train_image_datasets['train'].classes
inputs, classes = next(iter(train_dataloaders['train']))
######################################################################
# Prepare test data
if not opt.train_only:
print("========Preparing test dataset========")
transform_test_list = transforms.Compose([
transforms.Resize((384, 192), interpolation=3),
transforms.ToTensor(),
transforms.Normalize([0.485, 0.456, 0.406], [0.229, 0.224, 0.225])
])
test_image_datasets = {
x: datasets.ImageFolder(os.path.join(test_data_dir, x),
transform_test_list)
for x in ['gallery', 'query']
}
test_dataloaders = {
x: torch.utils.data.DataLoader(test_image_datasets[x],
batch_size=opt.test_batch,
shuffle=False,
num_workers=4)
for x in ['gallery', 'query']
}
print("Initializing model...")
if opt.use_dense:
model = ft_net_dense(len(class_names))
else:
model = ft_net(len(class_names))
if opt.PCB:
model = PCB(len(class_names))
print("Model size: {:.5f}M".format(
sum(p.numel() for p in model.parameters()) / 1000000.0))
start_epoch = opt.start_epoch
if opt.resume:
print("Loading checkpoint from '{}'".format(opt.resume))
checkpoint = torch.load(opt.resume)
model.load_state_dict(checkpoint['state_dict'])
# model.load_state_dict(checkpoint)
start_epoch = checkpoint['epoch']
if use_gpu:
model = nn.DataParallel(model).cuda()
if opt.evaluate:
print("Evaluate only")
test(model, test_image_datasets, test_dataloaders, use_gpu)
return
criterion = nn.CrossEntropyLoss().cuda()
if opt.PCB:
ignored_params = list(map(id, model.module.resnet50.fc.parameters()))
ignored_params += (
list(map(id, model.module.classifier0.parameters())) +
list(map(id, model.module.classifier1.parameters())) +
list(map(id, model.module.classifier2.parameters())) +
list(map(id, model.module.classifier3.parameters())) +
list(map(id, model.module.classifier4.parameters())) +
list(map(id, model.module.classifier5.parameters()))
#+list(map(id, model.classifier7.parameters() ))
)
base_params = filter(lambda p: id(p) not in ignored_params,
model.parameters())
optimizer = optim.SGD(
[
{
'params': base_params,
'lr': 0.01
},
{
'params': model.module.resnet50.fc.parameters(),
'lr': 0.1
},
{
'params': model.module.classifier0.parameters(),
'lr': 0.1
},
{
'params': model.module.classifier1.parameters(),
'lr': 0.1
},
{
'params': model.module.classifier2.parameters(),
'lr': 0.1
},
{
'params': model.module.classifier3.parameters(),
'lr': 0.1
},
{
'params': model.module.classifier4.parameters(),
'lr': 0.1
},
{
'params': model.module.classifier5.parameters(),
'lr': 0.1
},
#{'params': model.classifier7.parameters(), 'lr': 0.01}
],
weight_decay=5e-4,
momentum=0.9,
nesterov=True)
else:
ignored_params = list(map(
id, model.module.model.fc.parameters())) + list(
map(id, model.module.classifier.parameters()))
base_params = filter(lambda p: id(p) not in ignored_params,
model.parameters())
optimizer = optim.SGD([{
'params': base_params,
'lr': 0.01
}, {
'params': model.module.model.fc.parameters(),
'lr': 0.1
}, {
'params': model.module.classifier.parameters(),
'lr': 0.1
}],
weight_decay=5e-4,
momentum=0.9,
nesterov=True)
# Decay LR by a factor of 0.1 every 40 epochs
if opt.stepsize > 0:
scheduler = lr_scheduler.StepLR(optimizer,
step_size=opt.stepsize,
gamma=0.1)
start_time = time.time()
train_time = 0
best_rank1 = -np.inf
best_epoch = 0
print("==> Start training")
######################################################################
# Training the model
# ------------------
#
# Now, let's write a general function to train a model. Here, we will
# illustrate:
#
# - Scheduling the learning rate
# - Saving the best model
#
# In the following, parameter ``scheduler`` is an LR scheduler object from
# ``torch.optim.lr_scheduler``.
for epoch in range(start_epoch, opt.max_epoch):
start_train_time = time.time()
if opt.train_only:
print("==> Training only")
train(epoch, model, criterion, optimizer, train_dataloaders,
use_gpu)
train_time += round(time.time() - start_train_time)
if epoch % opt.eval_step == 0:
if use_gpu:
state_dict = model.module.state_dict()
else:
state_dict = model.state_dict()
save_checkpoint(
{
'state_dict': state_dict,
'epoch': epoch,
}, 0,
osp.join(opt.save_dir,
'checkpoint_ep' + str(epoch + 1) + '.pth.tar'))
if opt.stepsize > 0: scheduler.step()
else:
train(epoch, model, criterion, optimizer, train_dataloaders,
use_gpu)
train_time += round(time.time() - start_train_time)
if opt.stepsize > 0: scheduler.step()
if (epoch + 1) > opt.start_eval and opt.eval_step > 0 and (
epoch + 1) % opt.eval_step == 0 or (epoch +
1) == opt.max_epoch:
print("==> Test")
rank1 = test(model, test_image_datasets, test_dataloaders,
use_gpu)
is_best = rank1 > best_rank1
if is_best:
best_rank1 = rank1
best_epoch = epoch + 1
if use_gpu:
state_dict = model.module.state_dict()
else:
state_dict = model.state_dict()
save_checkpoint(
{
'state_dict': state_dict,
'rank1': rank1,
'epoch': epoch,
}, is_best,
osp.join(opt.save_dir,
'checkpoint_ep' + str(epoch + 1) + '.pth.tar'))
if not opt.train_only:
print("==> Best Rank-1 {:.1%}, achieved at epoch {}".format(
best_rank1, best_epoch))
elapsed = round(time.time() - start_time)
elapsed = str(datetime.timedelta(seconds=elapsed))
train_time = str(datetime.timedelta(seconds=train_time))
print(
"Finished. Total elapsed time (h:m:s): {}. Training time (h:m:s): {}.".
format(elapsed, train_time))
'lr': opt.lr
},
{
'params': model.classifier6.parameters(),
'lr': opt.lr
},
# {'params': model.classifier7.parameters(), 'lr': opt.lr}
],
weight_decay=5e-4,
momentum=0.9,
nesterov=True)
if torch.cuda.device_count() > 1:
model = nn.DataParallel(model)
pretrained_dict = torch.load(
'/home/junyang/experiment/re-id-resnext101/checkpoints/82.65/net_99.pth')
model_dict = model.state_dict()
pretrained_dict = {
k: v
for k, v in pretrained_dict.items() if k[0:10] != 'classifier'
}
model_dict.update(pretrained_dict)
model.load_state_dict(model_dict)
# Decay LR by a factor of 0.1 every 20 epochs
exp_lr_scheduler = lr_scheduler.StepLR(optimizer_ft, step_size=20, gamma=0.1)
# record
import glob
import shutil
#import os
#import datetime
time1 = datetime.datetime.now()
