def train_onet(model_store_path,
end_epoch,
imdb,
batch_size,
frequent=50,
base_lr=0.01,
use_cuda=True):
if not os.path.exists(model_store_path):
os.makedirs(model_store_path)
lossfn = LossFn()
net = ONet(is_train=True)
net.train()
print(use_cuda)
if use_cuda:
net.cuda()
optimizer = torch.optim.Adam(net.parameters(), lr=base_lr)
train_data = TrainImageReader(imdb, 48, batch_size, shuffle=True)
for cur_epoch in range(1, end_epoch + 1):
train_data.reset()
for batch_idx, (image, (gt_label, gt_bbox,
gt_landmark)) in enumerate(train_data):
# print("batch id {0}".format(batch_idx))
im_tensor = [
image_tools.convert_image_to_tensor(image[i, :, :, :])
for i in range(image.shape[0])
]
im_tensor = torch.stack(im_tensor)
im_tensor = Variable(im_tensor)
gt_label = Variable(torch.from_numpy(gt_label).float())
gt_bbox = Variable(torch.from_numpy(gt_bbox).float())
gt_landmark = Variable(torch.from_numpy(gt_landmark).float())
if use_cuda:
im_tensor = im_tensor.cuda()
gt_label = gt_label.cuda()
gt_bbox = gt_bbox.cuda()
gt_landmark = gt_landmark.cuda()
cls_pred, box_offset_pred, landmark_offset_pred = net(im_tensor)
# all_loss, cls_loss, offset_loss = lossfn.loss(gt_label=label_y,gt_offset=bbox_y, pred_label=cls_pred, pred_offset=box_offset_pred)
cls_loss = lossfn.cls_loss(gt_label, cls_pred)
box_offset_loss = lossfn.box_loss(gt_label, gt_bbox,
box_offset_pred)
landmark_loss = lossfn.landmark_loss(gt_label, gt_landmark,
landmark_offset_pred)
all_loss = cls_loss * 0.8 + box_offset_loss * 0.6 + landmark_loss * 1.5
if batch_idx % frequent == 0:
accuracy = compute_accuracy(cls_pred, gt_label)
show1 = accuracy.data.cpu().numpy()
show2 = cls_loss.data.cpu().numpy()
show3 = box_offset_loss.data.cpu().numpy()
show4 = landmark_loss.data.cpu().numpy()
show5 = all_loss.data.cpu().numpy()
print(
"%s : Epoch: %d, Step: %d, accuracy: %s, det loss: %s, bbox loss: %s, landmark loss: %s, all_loss: %s, lr:%s "
% (datetime.datetime.now(), cur_epoch, batch_idx, show1,
show2, show3, show4, show5, base_lr))
optimizer.zero_grad()
all_loss.backward()
optimizer.step()
torch.save(
net.state_dict(),
os.path.join(model_store_path, "onet_epoch_%d.pt" % cur_epoch))
torch.save(
net,
os.path.join(model_store_path,
"onet_epoch_model_%d.pkl" % cur_epoch))
def train_pnet(self, train_data_path):
device = torch.device('cuda')
lossfn = LossFn()
net = PNet()
# 返回 一样的 net = net.to(device)
net.to(device)
# 切换到train 状态 net.eval() 测试状态
net.train()
# print(net)
optimizer = torch.optim.Adam(net.parameters(), lr=1e-3)
self.viz.line(Y=torch.FloatTensor([0.]),
X=torch.FloatTensor([0.]),
win='pnet_train_loss',
opts=dict(title='train loss'))
# 加载数据 ratios : pos:part:neg:landmark
trian_datasets = DataReader(train_data_path,
im_size=12,
transform=self.trainTransform,
batch_size=4096,
ratios=(2, 1, 1, 2))
for epoch in range(1):
print("epoch:", epoch)
for step, (imgs, cls_labels, rois,
landmarks) in enumerate(trian_datasets):
# [b, 3, 12, 12],[b],[4],[10]
im_tensor = imgs.to(device)
cls_labels = cls_labels.to(device)
rois = rois.to(device)
landmarks = landmarks.to(device)
cls_pred, box_offset_pred, landmarks_pred = net(im_tensor)
# 貌似这里打印最后一个的loss,对于整体来说不怎么准确
cls_loss = lossfn.cls_loss(cls_labels, cls_pred)
box_offset_loss = lossfn.box_loss(cls_labels, rois,
box_offset_pred)
landmark_loss = lossfn.landmark_loss(cls_labels, landmarks,
landmarks_pred)
print("cls_loss:", cls_loss)
print("box_offset_loss:", box_offset_loss)
print("landmark_loss:", landmark_loss)
all_loss = cls_loss * 1.0 + box_offset_loss * 0.5 + landmark_loss * 0.5
self.viz.line(Y=torch.FloatTensor([all_loss]),
X=torch.FloatTensor([step]),
win='pnet_train_loss',
update='append')
optimizer.zero_grad()
all_loss.backward()
optimizer.step()
print("all_loss:", all_loss)
print("-" * 40, "step:", step, "-" * 40)
if step % 1000 == 0:
accuracy = compute_accuracy(cls_pred, cls_labels)
recoll = compute_recoll(cls_pred, cls_labels)
print(
"=" * 80, "\n\n=> acc:{}\n=> recoll:{}\n\n".format(
accuracy, recoll), "=" * 80)
if step % 1000 == 0:
torch.save(
net.state_dict(),
os.path.join("../data/models/",
"pnet_epoch_%d.pt" % epoch))
torch.save(
net,
os.path.join("../data/models/",
"pnet_epoch_model_%d.pkl" % epoch))
epoch += 1