def test_voc():
# load net
num_classes = len(VOC_CLASSES) + 1 # +1 background
net = build_net('test', 300, num_classes) # initialize SSD
net.load_state_dict(torch.load(args.trained_model))
net.eval()
print('Finished loading model!')
# load data
testset = VOCDetection(args.voc_root, [('2007', 'test')], None,
VOCAnnotationTransform())
if args.cuda:
net = net.cuda()
cudnn.benchmark = True
# evaluation
test_net(args.save_folder,
net,
args.cuda,
testset,
BaseTransform(net.size, (104, 117, 123)),
thresh=args.visual_threshold)
break
cv2.imshow('frame', frame)
# print("[INFO] approx. FPS: {:.2f}".format(fps.fps()))
if key == 27: # exit
break
if __name__ == '__main__':
import sys
from os import path
sys.path.append(path.dirname(path.dirname(path.abspath(__file__))))
# COCO_ROOT = '../data/'
from data import BaseTransform, VOC_CLASSES as labelmap
from models.Mobile_Net_V3_SSD import build_net
net = build_net('test', 300, 21) # initialize SSD
net.load_state_dict(torch.load(args.weights))
transform = BaseTransform(net.size,
(104 / 256.0, 117 / 256.0, 123 / 256.0))
fps = FPS().start()
cv2_demo(net.eval(), transform)
# stop the timer and display FPS information
fps.stop()
print("[INFO] elasped time: {:.2f}".format(fps.elapsed()))
print("[INFO] approx. FPS: {:.2f}".format(fps.fps()))
# cleanup
cv2.destroyAllWindows()
stream.stop()
with open(det_file, 'wb') as f:
pickle.dump(all_boxes, f, pickle.HIGHEST_PROTOCOL)
print('Evaluating detections')
evaluate_detections(all_boxes, output_dir, dataset)
def evaluate_detections(box_list, output_dir, dataset):
write_voc_results_file(box_list, dataset)
do_python_eval(output_dir)
if __name__ == '__main__':
# load net
num_classes = len(labelmap) + 1 # +1 for background
net = build_net('test', 300, num_classes) # initialize SSD
net.load_state_dict(torch.load(args.trained_model))
net.eval()
print('Finished loading model!')
# load data
dataset = VOCDetection(args.voc_root, [('2007', set_type)],
BaseTransform(300, dataset_mean),
VOCAnnotationTransform())
if args.cuda:
net = net.cuda()
cudnn.benchmark = True
# evaluation
test_net(args.save_folder,
net,
args.cuda,
dataset,
def train():
if args.dataset == 'COCO':
if args.dataset_root == VOC_ROOT:
if not os.path.exists(COCO_ROOT):
parser.error('Must specify dataset_root if specifying dataset')
print("WARNING: Using default COCO dataset_root because " +
"--dataset_root was not specified.")
args.dataset_root = COCO_ROOT
cfg = coco
dataset = COCODetection(root=args.dataset_root,
transform=SSDAugmentation(
cfg['min_dim'], MEANS))
elif args.dataset == 'VOC':
if args.dataset_root == COCO_ROOT:
parser.error('Must specify dataset if specifying dataset_root')
cfg = voc
dataset = VOCDetection(root=args.dataset_root,
transform=SSDAugmentation(
cfg['min_dim'], MEANS))
ssd_net = build_net('train', cfg['min_dim'], cfg['num_classes'])
net = ssd_net
if args.cuda:
net = torch.nn.DataParallel(ssd_net)
cudnn.benchmark = True
if args.resume:
print('Resuming training, loading {}...'.format(args.resume))
ssd_net.load_weights(args.resume)
# else:
# vgg_weights = torch.load(args.save_folder + args.basenet)
# print('Loading base network...')
# ssd_net.vgg.load_state_dict(vgg_weights)
if args.cuda:
net = net.cuda()
if not args.resume:
print('Initializing weights...')
# initialize newly added layers' weights with xavier method
ssd_net.loc.apply(weights_init)
ssd_net.conf.apply(weights_init)
optimizer = optim.SGD(net.parameters(),
lr=args.lr,
momentum=args.momentum,
weight_decay=args.weight_decay)
criterion = MultiBoxLoss(cfg['num_classes'], 0.5, True, 0, True, 3, 0.5,
False, args.cuda)
priorbox = PriorBox(cfg)
with torch.no_grad():
priors = priorbox.forward()
priors = priors.cuda()
net.train()
# loss counters
loc_loss = 0
conf_loss = 0
epoch = 0
print('Loading the dataset...')
epoch_size = len(dataset) // args.batch_size
print('Training SSD on:', dataset.name)
print('Using the specified args:')
print(args)
step_index = 0
data_loader = data.DataLoader(dataset,
args.batch_size,
num_workers=args.num_workers,
shuffle=True,
collate_fn=detection_collate,
pin_memory=True)
# create batch iterator
batch_iterator = iter(data_loader)
for iteration in range(args.start_iter, cfg['max_iter']):
# reset epoch loss counters
loc_loss = 0
conf_loss = 0
epoch += 1
if iteration in cfg['lr_steps']:
step_index += 1
adjust_learning_rate(optimizer, args.gamma, step_index)
# load train data
try:
images, targets = next(batch_iterator)
except StopIteration:
batch_iterator = iter(data_loader)
images, targets = next(batch_iterator)
if args.cuda:
images = Variable(images.cuda())
targets = [Variable(ann.cuda(), volatile=True) for ann in targets]
else:
images = Variable(images)
targets = [Variable(ann, volatile=True) for ann in targets]
# forward
t0 = time.time()
out = net(images)
# backprop
optimizer.zero_grad()
loss_l, loss_c = criterion(out, priors, targets)
loss = loss_l + loss_c
loss.backward()
optimizer.step()
t1 = time.time()
loc_loss += loss_l.item()
conf_loss += loss_c.item()
if iteration % 10 == 0:
print('timer: %.4f sec.' % (t1 - t0))
print('iter ' + repr(iteration) + ' || Loss: %.4f ||' %
(loss.item()),
end=' ')
if iteration != 0 and iteration % 5000 == 0:
print('Saving state, iter:', iteration)
torch.save(
ssd_net.state_dict(),
'weights/Mobile-Net-ssd300_COCO_' + repr(iteration) + '.pth')
torch.save(ssd_net.state_dict(),
args.save_folder + '' + args.dataset + '.pth')