class TrainVal:
def __init__(self, config, fold):
"""
Args:
config: 配置参数
fold: 当前为第几折
"""
self.config = config
self.fold = fold
self.epoch = config.epoch
self.num_classes = config.num_classes
self.lr_scheduler = config.lr_scheduler
self.save_interval = 10
self.cut_mix = config.cut_mix
self.beta = config.beta
self.cutmix_prob = config.cutmix_prob
self.auto_aug = config.auto_aug
# 多尺度
self.image_size = config.image_size
self.multi_scale = config.multi_scale
self.val_multi_scale = config.val_multi_scale
self.multi_scale_size = config.multi_scale_size
self.multi_scale_interval = config.multi_scale_interval
# 稀疏训练
self.sparsity = config.sparsity
self.sparsity_scale = config.sparsity_scale
self.penalty_type = config.penalty_type
self.selected_labels = config.selected_labels
if self.auto_aug:
print('@ Using AutoAugment.')
if self.cut_mix:
print('@ Using cut mix.')
if self.multi_scale:
print('@ Using multi scale training.')
print('@ Using LOSS: {}'.format(config.loss_name))
# 加载模型
prepare_model = PrepareModel()
self.model = prepare_model.create_model(model_type=config.model_type,
classes_num=self.num_classes,
drop_rate=config.drop_rate,
pretrained=True,
bn_to_gn=config.bn_to_gn)
if config.weight_path:
self.model = prepare_model.load_chekpoint(self.model,
config.weight_path)
# 稀疏训练
self.sparsity_train = None
if config.sparsity:
print('@ Using sparsity training.')
self.sparsity_train = Sparsity(self.model,
sparsity_scale=self.sparsity_scale,
penalty_type=self.penalty_type)
# l1正则化
self.l1_regular = config.l1_regular
self.l1_decay = config.l1_decay
if self.l1_regular:
print('@ Using l1_regular')
self.l1_reg_loss = Regularization(self.model,
weight_decay=self.l1_decay,
p=1)
if torch.cuda.is_available():
self.model = torch.nn.DataParallel(self.model)
self.model = self.model.cuda()
# 加载优化器
self.optimizer = prepare_model.create_optimizer(
config.model_type, self.model, config)
# 加载衰减策略
self.exp_lr_scheduler = prepare_model.create_lr_scheduler(
self.lr_scheduler,
self.optimizer,
step_size=config.lr_step_size,
restart_step=config.restart_step,
multi_step=config.multi_step,
warmup=config.warmup,
multiplier=config.multiplier,
warmup_epoch=config.warmup_epoch,
delay_epoch=config.delay_epoch)
# 加载损失函数
self.criterion = Loss(config.model_type, config.loss_name,
self.num_classes)
# 实例化实现各种子函数的 solver 类
self.device = torch.device(
'cuda' if torch.cuda.is_available() else 'cpu')
self.solver = Solver(self.model, self.device)
# log初始化
self.writer, self.time_stamp = self.init_log()
self.model_path = os.path.join(self.config.save_path,
self.config.model_type, self.time_stamp)
# 初始化分类度量准则类
with open("online-service/model/label_id_name.json",
'r',
encoding='utf-8') as json_file:
self.class_names = list(json.load(json_file).values())
self.classification_metric = ClassificationMetric(
self.class_names, self.model_path)
self.max_accuracy_valid = 0
def train(self, train_loader, valid_loader):
""" 完成模型的训练，保存模型与日志
Args:
train_loader: 训练数据的DataLoader
valid_loader: 验证数据的Dataloader
"""
global_step = 0
for epoch in range(self.epoch):
self.model.train()
epoch += 1
images_number, epoch_corrects = 0, 0
tbar = tqdm.tqdm(train_loader)
image_size = self.image_size
l1_regular_loss = 0
loss_with_l1_regular = 0
for i, (images, labels) in enumerate(tbar):
if self.multi_scale:
if i % self.multi_scale_interval == 0:
image_size = random.choice(self.multi_scale_size)
images = multi_scale_transforms(image_size,
images,
auto_aug=self.auto_aug)
if self.cut_mix:
# 使用cut_mix
r = np.random.rand(1)
if self.beta > 0 and r < self.cutmix_prob:
images, labels_a, labels_b, lam = generate_mixed_sample(
self.beta, images, labels)
labels_predict = self.solver.forward(images)
loss = self.solver.cal_loss_cutmix(
labels_predict, labels_a, labels_b, lam,
self.criterion)
else:
# 网络的前向传播
labels_predict = self.solver.forward(images)
loss = self.solver.cal_loss(labels_predict, labels,
self.criterion)
else:
# 网络的前向传播
labels_predict = self.solver.forward(images)
loss = self.solver.cal_loss(labels_predict, labels,
self.criterion)
if self.l1_regular:
current_l1_regular_loss = self.l1_reg_loss(self.model)
loss += current_l1_regular_loss
l1_regular_loss += current_l1_regular_loss.item()
loss_with_l1_regular += loss.item()
self.solver.backword(self.optimizer,
loss,
sparsity=self.sparsity_train)
images_number += images.size(0)
epoch_corrects += self.model.module.get_classify_result(
labels_predict, labels, self.device).sum()
train_acc_iteration = self.model.module.get_classify_result(
labels_predict, labels, self.device).mean()
# 保存到tensorboard，每一步存储一个
descript = self.criterion.record_loss_iteration(
self.writer.add_scalar, global_step + i)
self.writer.add_scalar('TrainAccIteration',
train_acc_iteration, global_step + i)
params_groups_lr = str()
for group_ind, param_group in enumerate(
self.optimizer.param_groups):
params_groups_lr = params_groups_lr + 'pg_%d' % group_ind + ': %.8f, ' % param_group[
'lr']
descript = '[Train Fold {}][epoch: {}/{}][image_size: {}][Lr :{}][Acc: {:.4f}]'.format(
self.fold, epoch, self.epoch, image_size, params_groups_lr,
train_acc_iteration) + descript
if self.l1_regular:
descript += '[L1RegularLoss: {:.4f}][Loss: {:.4f}]'.format(
current_l1_regular_loss.item(), loss.item())
tbar.set_description(desc=descript)
# 写到tensorboard中
epoch_acc = epoch_corrects / images_number
self.writer.add_scalar('TrainAccEpoch', epoch_acc, epoch)
self.writer.add_scalar('Lr', self.optimizer.param_groups[0]['lr'],
epoch)
if self.l1_regular:
l1_regular_loss_epoch = l1_regular_loss / len(train_loader)
loss_with_l1_regular_epoch = loss_with_l1_regular / len(
train_loader)
self.writer.add_scalar('TrainL1RegularLoss',
l1_regular_loss_epoch, epoch)
self.writer.add_scalar('TrainLossWithL1Regular',
loss_with_l1_regular_epoch, epoch)
descript = self.criterion.record_loss_epoch(
len(train_loader), self.writer.add_scalar, epoch)
# Print the log info
print('[Finish epoch: {}/{}][Average Acc: {:.4}]'.format(
epoch, self.epoch, epoch_acc) + descript)
# 验证模型
val_accuracy, val_loss, is_best = self.validation(
valid_loader, self.val_multi_scale)
# 保存参数
state = {
'epoch': epoch,
'state_dict': self.model.module.state_dict(),
'max_score': self.max_accuracy_valid
}
self.solver.save_checkpoint(
os.path.join(
self.model_path,
'%s_fold%d.pth' % (self.config.model_type, self.fold)),
state, is_best)
if epoch % self.save_interval == 0:
self.solver.save_checkpoint(
os.path.join(
self.model_path, '%s_epoch%d_fold%d.pth' %
(self.config.model_type, epoch, self.fold)), state,
False)
# 写到tensorboard中
self.writer.add_scalar('ValidLoss', val_loss, epoch)
self.writer.add_scalar('ValidAccuracy', val_accuracy, epoch)
# 每一个epoch完毕之后，执行学习率衰减
if self.lr_scheduler == 'ReduceLR':
self.exp_lr_scheduler.step(metrics=val_accuracy)
else:
self.exp_lr_scheduler.step()
global_step += len(train_loader)
print('BEST ACC:{}'.format(self.max_accuracy_valid))
source_path = os.path.join(self.model_path, 'model_best.pth')
target_path = os.path.join(self.config.save_path,
self.config.model_type, 'backup',
'model_best.pth')
print('Copy %s to %s' % (source_path, target_path))
shutil.copy(source_path, target_path)
def validation(self, valid_loader, multi_scale=False):
self.model.eval()
labels_predict_all, labels_all = np.empty(shape=(0, )), np.empty(
shape=(0, ))
epoch_loss = 0
with torch.no_grad():
if multi_scale:
multi_oa = []
for image_size in self.multi_scale_size:
tbar = tqdm.tqdm(valid_loader)
# 对于每一个尺度都计算准确率
for i, (_, images, labels) in enumerate(tbar):
images = multi_scale_transforms(image_size,
images,
auto_aug=False)
# 网络的前向传播
labels_predict = self.solver.forward(images)
loss = self.solver.cal_loss(labels_predict, labels,
self.criterion)
epoch_loss += loss
# 先经过softmax函数，再经过argmax函数
labels_predict = F.softmax(labels_predict, dim=1)
labels_predict = torch.argmax(
labels_predict, dim=1).detach().cpu().numpy()
labels_predict_all = np.concatenate(
(labels_predict_all, labels_predict))
labels_all = np.concatenate((labels_all, labels))
descript = '[Valid][Loss: {:.4f}]'.format(loss)
tbar.set_description(desc=descript)
classify_report, my_confusion_matrix, acc_for_each_class, oa, average_accuracy, kappa = \
self.classification_metric.get_metric(
labels_all,
labels_predict_all
)
multi_oa.append(oa)
oa = np.asarray(multi_oa).mean()
else:
tbar = tqdm.tqdm(valid_loader)
for i, (_, images, labels) in enumerate(tbar):
# 网络的前向传播
labels_predict = self.solver.forward(images)
loss = self.solver.cal_loss(labels_predict, labels,
self.criterion)
epoch_loss += loss
# 先经过softmax函数，再经过argmax函数
labels_predict = F.softmax(labels_predict, dim=1)
labels_predict = torch.argmax(
labels_predict, dim=1).detach().cpu().numpy()
labels_predict_all = np.concatenate(
(labels_predict_all, labels_predict))
labels_all = np.concatenate((labels_all, labels))
descript = '[Valid][Loss: {:.4f}]'.format(loss)
tbar.set_description(desc=descript)
classify_report, my_confusion_matrix, acc_for_each_class, oa, average_accuracy, kappa = \
self.classification_metric.get_metric(
labels_all,
labels_predict_all
)
if oa > self.max_accuracy_valid:
is_best = True
self.max_accuracy_valid = oa
if not self.selected_labels:
# 只有在未指定训练类别时才画混淆矩阵，否则会出错
self.classification_metric.draw_cm_and_save_result(
classify_report, my_confusion_matrix,
acc_for_each_class, oa, average_accuracy, kappa)
else:
is_best = False
print('OA:{}, AA:{}, Kappa:{}'.format(oa, average_accuracy, kappa))
return oa, epoch_loss / len(tbar), is_best
def init_log(self):
# 保存配置信息和初始化tensorboard
TIMESTAMP = "log-{0:%Y-%m-%dT%H-%M-%S}".format(datetime.datetime.now())
log_dir = os.path.join(self.config.save_path, self.config.model_type,
TIMESTAMP)
writer = SummaryWriter(log_dir=log_dir)
with codecs.open(os.path.join(log_dir, 'config.json'), 'w',
"utf-8") as json_file:
json.dump({k: v
for k, v in config._get_kwargs()},
json_file,
ensure_ascii=False)
seed = int(time.time())
seed_torch(seed)
with open(os.path.join(log_dir, 'seed.pkl'), 'wb') as f:
pickle.dump({'seed': seed}, f, -1)
return writer, TIMESTAMP
class TrainVal:
def __init__(self, config, fold, train_labels_number):
"""
Args:
config: 配置参数
fold: int, 当前为第几折
train_labels_number: list, 某一折的[number_class0, number__class1, ...]
"""
self.config = config
self.fold = fold
self.epoch = config.epoch
self.num_classes = config.num_classes
self.lr_scheduler = config.lr_scheduler
self.save_interval = 100
self.cut_mix = config.cut_mix
self.beta = config.beta
self.cutmix_prob = config.cutmix_prob
self.image_size = config.image_size
self.multi_scale = config.multi_scale
self.multi_scale_size = config.multi_scale_size
self.multi_scale_interval = config.multi_scale_interval
if self.cut_mix:
print('Using cut mix.')
if self.multi_scale:
print('Using multi scale training.')
print('USE LOSS: {}'.format(config.loss_name))
# 加载模型
prepare_model = PrepareModel()
self.model = prepare_model.create_model(model_type=config.model_type,
classes_num=self.num_classes,
drop_rate=config.drop_rate,
pretrained=True,
bn_to_gn=config.bn_to_gn)
if torch.cuda.is_available():
self.model = torch.nn.DataParallel(self.model)
self.model = self.model.cuda()
# 加载优化器
self.optimizer = prepare_model.create_optimizer(
config.model_type, self.model, config)
# 加载衰减策略
self.exp_lr_scheduler = prepare_model.create_lr_scheduler(
self.lr_scheduler,
self.optimizer,
step_size=config.lr_step_size,
restart_step=config.restart_step,
multi_step=config.multi_step)
# 加载损失函数
self.criterion = Loss(config.model_type, config.loss_name,
self.num_classes, train_labels_number,
config.beta_CB, config.gamma)
# 实例化实现各种子函数的 solver 类
self.device = torch.device(
'cuda' if torch.cuda.is_available() else 'cpu')
self.solver = Solver(self.model, self.device)
if config.restore:
weight_path = os.path.join('checkpoints', config.model_type)
if config.restore == 'last':
lists = os.listdir(weight_path) # 获得文件夹内所有文件
lists.sort(key=lambda fn: os.path.getmtime(weight_path + '/' +
fn)) # 按照最近修改时间排序
weight_path = os.path.join(weight_path, lists[-1],
'model_best.pth')
else:
weight_path = os.path.join(weight_path, config.restore,
'model_best.pth')
self.solver.load_checkpoint(weight_path)
# log初始化
self.writer, self.time_stamp = self.init_log()
self.model_path = os.path.join(self.config.train_url,
self.config.model_type, self.time_stamp)
# 初始化分类度量准则类
with open("online-service/model/label_id_name.json",
'r',
encoding='utf-8') as json_file:
self.class_names = list(json.load(json_file).values())
self.classification_metric = ClassificationMetric(self.class_names,
self.model_path,
text_flag=0)
self.max_accuracy_valid = 0
def train(self, train_loader, valid_loader):
""" 完成模型的训练，保存模型与日志
Args:
train_loader: 训练数据的DataLoader
valid_loader: 验证数据的Dataloader
"""
global_step = 0
for epoch in range(self.epoch):
self.model.train()
epoch += 1
images_number, epoch_corrects = 0, 0
tbar = tqdm.tqdm(train_loader)
image_size = self.image_size
for i, (_, images, labels) in enumerate(tbar):
if self.multi_scale:
if i % self.multi_scale_interval == 0:
image_size = random.choice(self.multi_scale_size)
images = multi_scale_transforms(image_size, images)
if self.cut_mix:
# 使用cut_mix
r = np.random.rand(1)
if self.beta > 0 and r < self.cutmix_prob:
images, labels_a, labels_b, lam = generate_mixed_sample(
self.beta, images, labels)
labels_predict = self.solver.forward(images)
loss = self.solver.cal_loss_cutmix(
labels_predict, labels_a, labels_b, lam,
self.criterion)
else:
# 网络的前向传播
labels_predict = self.solver.forward(images)
loss = self.solver.cal_loss(labels_predict, labels,
self.criterion)
else:
# 网络的前向传播
labels_predict = self.solver.forward(images)
loss = self.solver.cal_loss(labels_predict, labels,
self.criterion)
self.solver.backword(self.optimizer, loss)
images_number += images.size(0)
epoch_corrects += self.model.module.get_classify_result(
labels_predict, labels, self.device).sum()
train_acc_iteration = self.model.module.get_classify_result(
labels_predict, labels, self.device).mean()
# 保存到tensorboard，每一步存储一个
descript = self.criterion.record_loss_iteration(
self.writer.add_scalar, global_step + i)
self.writer.add_scalar('TrainAccIteration',
train_acc_iteration, global_step + i)
params_groups_lr = str()
for group_ind, param_group in enumerate(
self.optimizer.param_groups):
params_groups_lr = params_groups_lr + 'pg_%d' % group_ind + ': %.8f, ' % param_group[
'lr']
descript = '[Train Fold {}][epoch: {}/{}][image_size: {}][Lr :{}][Acc: {:.4f}]'.format(
self.fold, epoch, self.epoch, image_size, params_groups_lr,
train_acc_iteration) + descript
# 对于 CyclicLR，要每一步均执行依次学习率衰减
if self.lr_scheduler == 'CyclicLR':
self.exp_lr_scheduler.step()
self.writer.add_scalar(
'Lr', self.optimizer.param_groups[1]['lr'],
global_step + i)
tbar.set_description(desc=descript)
# 写到tensorboard中
epoch_acc = epoch_corrects / images_number
self.writer.add_scalar('TrainAccEpoch', epoch_acc, epoch)
if self.lr_scheduler != 'CyclicLR':
self.writer.add_scalar('Lr',
self.optimizer.param_groups[1]['lr'],
epoch)
descript = self.criterion.record_loss_epoch(
len(train_loader), self.writer.add_scalar, epoch)
# Print the log info
print('[Finish epoch: {}/{}][Average Acc: {:.4}]'.format(
epoch, self.epoch, epoch_acc) + descript)
# 验证模型
val_accuracy, val_loss, is_best = self.validation(valid_loader)
# 保存参数
state = {
'epoch': epoch,
'state_dict': self.model.module.state_dict(),
'max_score': self.max_accuracy_valid
}
self.solver.save_checkpoint(
os.path.join(
self.model_path,
'%s_fold%d.pth' % (self.config.model_type, self.fold)),
state, is_best)
if epoch % self.save_interval == 0:
self.solver.save_checkpoint(
os.path.join(
self.model_path, '%s_epoch%d_fold%d.pth' %
(self.config.model_type, epoch, self.fold)), state,
False)
# 写到tensorboard中
self.writer.add_scalar('ValidLoss', val_loss, epoch)
self.writer.add_scalar('ValidAccuracy', val_accuracy, epoch)
# 每一个epoch完毕之后，执行学习率衰减
if self.lr_scheduler == 'ReduceLR':
self.exp_lr_scheduler.step(val_loss)
elif self.lr_scheduler != 'CyclicLR':
self.exp_lr_scheduler.step()
global_step += len(train_loader)
print('BEST ACC:{}'.format(self.max_accuracy_valid))
def validation(self, valid_loader):
tbar = tqdm.tqdm(valid_loader)
self.model.eval()
labels_predict_all, labels_all = np.empty(shape=(0, )), np.empty(
shape=(0, ))
epoch_loss = 0
with torch.no_grad():
for i, (_, images, labels) in enumerate(tbar):
# 网络的前向传播
labels_predict = self.solver.forward(images)
loss = self.solver.cal_loss(labels_predict, labels,
self.criterion)
epoch_loss += loss
# 先经过softmax函数，再经过argmax函数
labels_predict = F.softmax(labels_predict, dim=1)
labels_predict = torch.argmax(labels_predict,
dim=1).detach().cpu().numpy()
labels_predict_all = np.concatenate(
(labels_predict_all, labels_predict))
labels_all = np.concatenate((labels_all, labels))
descript = '[Valid][Loss: {:.4f}]'.format(loss)
tbar.set_description(desc=descript)
classify_report, my_confusion_matrix, acc_for_each_class, oa, average_accuracy, kappa = \
self.classification_metric.get_metric(
labels_all,
labels_predict_all
)
if oa > self.max_accuracy_valid:
is_best = True
self.max_accuracy_valid = oa
self.classification_metric.draw_cm_and_save_result(
classify_report, my_confusion_matrix, acc_for_each_class,
oa, average_accuracy, kappa)
else:
is_best = False
print('OA:{}, AA:{}, Kappa:{}'.format(oa, average_accuracy, kappa))
return oa, epoch_loss / len(tbar), is_best
def init_log(self):
# 保存配置信息和初始化tensorboard
TIMESTAMP = "log-{0:%Y-%m-%dT%H-%M-%S}".format(datetime.datetime.now())
log_dir = os.path.join(self.config.train_url, self.config.model_type,
TIMESTAMP)
writer = SummaryWriter(log_dir=log_dir)
with codecs.open(os.path.join(log_dir, 'param.json'), 'w',
"utf-8") as json_file:
json.dump({k: v
for k, v in config._get_kwargs()},
json_file,
ensure_ascii=False)
seed = int(time.time())
seed_torch(seed)
with open(os.path.join(log_dir, 'seed.pkl'), 'wb') as f:
pickle.dump({'seed': seed}, f, -1)
return writer, TIMESTAMP
