def __init__(self, configer):
self.configer = configer
if self.configer.get('data', 'image_tool') == 'pil':
self.aug_train_transform = pil_aug_trans.PILAugCompose(
self.configer, split='train')
elif self.configer.get('data', 'image_tool') == 'cv2':
self.aug_train_transform = cv2_aug_trans.CV2AugCompose(
self.configer, split='train')
else:
Log.error('Not support {} image tool.'.format(
self.configer.get('data', 'image_tool')))
exit(1)
if self.configer.get('data', 'image_tool') == 'pil':
self.aug_val_transform = pil_aug_trans.PILAugCompose(self.configer,
split='val')
elif self.configer.get('data', 'image_tool') == 'cv2':
self.aug_val_transform = cv2_aug_trans.CV2AugCompose(self.configer,
split='val')
else:
Log.error('Not support {} image tool.'.format(
self.configer.get('data', 'image_tool')))
exit(1)
self.img_transform = trans.Compose([
trans.ToTensor(),
trans.Normalize(**self.configer.get('data', 'normalize')),
])
self.label_transform = trans.Compose([
trans.ToLabel(),
trans.ReLabel(255, -1),
])
def im_detect_bbox(model, images, target_scale, target_max_size, device):
"""
Performs bbox detection on the original image.
"""
transform = TT.Compose([
T.Resize(target_scale, target_max_size),
TT.ToTensor(),
T.Normalize(mean=cfg.INPUT.PIXEL_MEAN,
std=cfg.INPUT.PIXEL_STD,
to_bgr255=cfg.INPUT.TO_BGR255)
])
images = [transform(image) for image in images]
images = to_image_list(images, cfg.DATALOADER.SIZE_DIVISIBILITY)
return model(images.to(device))
def im_detect_bbox_hflip(model, images, target_scale, target_max_size, device):
"""
Performs bbox detection on the horizontally flipped image.
Function signature is the same as for im_detect_bbox.
"""
transform = TT.Compose([
T.Resize(target_scale, target_max_size),
TT.RandomHorizontalFlip(1.0),
TT.ToTensor(),
T.Normalize(mean=cfg.INPUT.PIXEL_MEAN,
std=cfg.INPUT.PIXEL_STD,
to_bgr255=cfg.INPUT.TO_BGR255)
])
images = [transform(image) for image in images]
images = to_image_list(images, cfg.DATALOADER.SIZE_DIVISIBILITY)
boxlists = model(images.to(device))
# Invert the detections computed on the flipped image
boxlists_inv = [boxlist.transpose(0) for boxlist in boxlists]
return boxlists_inv
def main(cfg):
util.init_random_seed(cfg.seed)
os.environ['CUDA_VISIBLE_DEVICES'] = cfg.gpu_devices
use_gpu = torch.cuda.is_available()
if cfg.use_cpu:
use_gpu = False
cfg.ckpt_dir = "test" if cfg.evaluate else cfg.ckpt_dir
cfg.save_dir = osp.join(cfg.save_dir, cfg.ckpt_dir)
util.mkdir_if_missing(cfg.save_dir)
if not cfg.evaluate:
sys.stdout = util.Logger(osp.join(cfg.save_dir, 'log_train.txt'))
else:
sys.stdout = util.Logger(osp.join(cfg.save_dir, 'log_test.txt'))
print("==========\nArgs:{}\n==========".format(cfg))
if use_gpu:
print("Currently using GPU {}".format(cfg.gpu_devices))
cudnn.benchmark = True
torch.cuda.manual_seed_all(cfg.seed)
else:
print("Currently using CPU (GPU is highly recommended)")
# --------------------------------------------------------------------------------------------
print("* Initializing dataset {}".format(cfg.dataset))
dataset = getdata.init_dataset(name=cfg.dataset)
cfg.num_train_pids = dataset.num_train_pids
transform_train = T.Compose([
T.Random2DTranslation(cfg.height, cfg.width),
T.RandomHorizontalFlip(),
T.ToTensor(),
T.Normalize(mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225]),
])
transform_test = T.Compose([
T.Resize((cfg.height, cfg.width)),
T.ToTensor(),
T.Normalize(mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225]),
])
pin_memory = True if use_gpu else False
trainloader = DataLoader(
# train_set,
VideoDataset(dataset.train, seq_len=cfg.seq_len, sample=cfg.train_sample_method, transform=transform_train),
sampler=RandomIdentitySampler(dataset.train, batch_size=cfg.train_batch, num_instances=cfg.num_instances),
batch_size=cfg.train_batch, num_workers=cfg.workers,
pin_memory=pin_memory, drop_last=True,
)
queryloader = DataLoader(
# query_set,
VideoDataset(dataset.query, seq_len=cfg.seq_len, sample=cfg.test_sample_method, transform=transform_test),
batch_size=cfg.test_batch, shuffle=False, num_workers=0,
pin_memory=pin_memory, drop_last=False,
)
galleryloader = DataLoader(
# gallery_set,
VideoDataset(dataset.gallery, seq_len=cfg.seq_len, sample=cfg.test_sample_method, transform=transform_test),
batch_size=cfg.test_batch, shuffle=False, num_workers=0,
pin_memory=pin_memory, drop_last=False,
)
# --------------------------------------------------------------------------------------------
# Initialize model, optimizer, and scheduler
print("* Initializing model: {}".format(cfg.arch))
model = get_model(cfg)
print("Model size: {:.2f}M".format(sum(p.numel() for p in model.parameters()) / 1000000.0))
criterion_xent = CrossEntropyLabelSmooth(num_classes=dataset.num_train_pids, use_gpu=use_gpu)
criterion_htri = TripletLoss(margin=cfg.margin)
optimizer = torch.optim.Adam(model.parameters(), lr=cfg.lr, weight_decay=cfg.weight_decay)
assert cfg.stepsize > 0
scheduler = lr_scheduler.StepLR(optimizer, step_size=cfg.stepsize, gamma=cfg.gamma, last_epoch=-1)
if cfg.warmup_epoch > 0:
scheduler = WarmUpLR(optimizer, scheduler, cfg.warmup_epoch, len(trainloader))
# --------------------------------------------------------------------------------------------
# optionally resume from a checkpoint
best_rank1 = -np.inf
start_epoch = cfg.start_epoch
if cfg.resume:
checkpoint = torch.load(cfg.resume)
start_epoch = checkpoint['epoch'] + 1
best_rank1 = checkpoint['rank1']
model.load_state_dict(checkpoint['state_dict'])
optimizer.load_state_dict(checkpoint['optimizer'])
scheduler = lr_scheduler.StepLR(optimizer, step_size=cfg.stepsize, gamma=cfg.gamma,
last_epoch=checkpoint['epoch'])
print("loaded checkpoint '{}' (epoch {})".format(cfg.resume, checkpoint['epoch']))
del checkpoint
if use_gpu:
model = nn.DataParallel(model).cuda()
if cfg.evaluate:
print("* Evaluating")
with torch.no_grad():
evaluate(model, queryloader, galleryloader, cfg.pool, use_gpu)
return
if cfg.arch == '3d':
torch.backends.cudnn.benchmark = False
# --------------------------------------------------------------------------------------------
print("\n* Start training")
start_time = time.time()
for epoch in range(start_epoch, cfg.max_epoch):
epoch_start_time = time.time()
update_lr(scheduler, epoch, n_iter=None)
train_one_epoch(
model,
epoch,
optimizer,
scheduler,
trainloader,
cfg.warmup_epoch,
criterion_xent,
criterion_htri,
use_gpu
)
lr_msg = 'used lr: '
for item in [pg['lr'] for pg in optimizer.param_groups]:
lr_msg += '%.0E ' % (item)
print('* end of epoch {}/{}, time taken: {:.0f} sec, {}'.format(
epoch, cfg.max_epoch, time.time() - epoch_start_time, lr_msg))
# scheduler.step(epoch + 1) # setting lr for next epoch, self.last_epoch==epoch+1
if epoch in cfg.eval_steps or (epoch + 1) == cfg.max_epoch:
print("* evaluate")
with torch.no_grad():
rank1 = eval(model, queryloader, galleryloader, use_gpu)
is_best = rank1 > best_rank1
if is_best: best_rank1 = rank1
if use_gpu:
state_dict = model.module.state_dict()
else:
state_dict = model.state_dict()
util.save_checkpoint({
'rank1': rank1,
'epoch': epoch,
'state_dict': state_dict,
'optimizer': optimizer.state_dict(),
}, is_best, osp.join(cfg.save_dir, 'latest.pth'))
elapsed = round(time.time() - start_time)
elapsed = str(datetime.timedelta(seconds=elapsed))
print("Checkpoints are saved to {}".format(cfg.save_dir))
print("Finished. Total elapsed time (h:m:s): {}".format(elapsed))
