def main():
parser = argparse.ArgumentParser(description="SSD training")
parser.add_argument(
"--only_create_dataset",
type=ast.literal_eval,
default=False,
help="If set it true, only create Mindrecord, default is False.")
parser.add_argument("--distribute",
type=ast.literal_eval,
default=False,
help="Run distribute, default is False.")
parser.add_argument("--device_id",
type=int,
default=0,
help="Device id, default is 0.")
parser.add_argument("--device_num",
type=int,
default=1,
help="Use device nums, default is 1.")
parser.add_argument("--lr",
type=float,
default=0.05,
help="Learning rate, default is 0.05.")
parser.add_argument("--mode",
type=str,
default="sink",
help="Run sink mode or not, default is sink.")
parser.add_argument("--dataset",
type=str,
default="coco",
help="Dataset, defalut is coco.")
parser.add_argument("--epoch_size",
type=int,
default=500,
help="Epoch size, default is 500.")
parser.add_argument("--batch_size",
type=int,
default=32,
help="Batch size, default is 32.")
parser.add_argument("--pre_trained",
type=str,
default=None,
help="Pretrained Checkpoint file path.")
parser.add_argument("--pre_trained_epoch_size",
type=int,
default=0,
help="Pretrained epoch size.")
parser.add_argument("--save_checkpoint_epochs",
type=int,
default=10,
help="Save checkpoint epochs, default is 10.")
parser.add_argument("--loss_scale",
type=int,
default=1024,
help="Loss scale, default is 1024.")
parser.add_argument("--filter_weight",
type=ast.literal_eval,
default=False,
help="Filter weight parameters, default is False.")
args_opt = parser.parse_args()
context.set_context(mode=context.GRAPH_MODE,
device_target="Ascend",
device_id=args_opt.device_id)
if args_opt.distribute:
device_num = args_opt.device_num
context.reset_auto_parallel_context()
context.set_auto_parallel_context(
parallel_mode=ParallelMode.DATA_PARALLEL,
mirror_mean=True,
device_num=device_num)
init()
rank = args_opt.device_id % device_num
else:
rank = 0
device_num = 1
print("Start create dataset!")
# It will generate mindrecord file in args_opt.mindrecord_dir,
# and the file name is ssd.mindrecord0, 1, ... file_num.
prefix = "ssd.mindrecord"
mindrecord_dir = config.mindrecord_dir
mindrecord_file = os.path.join(mindrecord_dir, prefix + "0")
if not os.path.exists(mindrecord_file):
if not os.path.isdir(mindrecord_dir):
os.makedirs(mindrecord_dir)
if args_opt.dataset == "coco":
if os.path.isdir(config.coco_root):
print("Create Mindrecord.")
data_to_mindrecord_byte_image("coco", True, prefix)
print("Create Mindrecord Done, at {}".format(mindrecord_dir))
else:
print("coco_root not exits.")
elif args_opt.dataset == "voc":
if os.path.isdir(config.voc_dir):
print("Create Mindrecord.")
voc_data_to_mindrecord(mindrecord_dir, True, prefix)
print("Create Mindrecord Done, at {}".format(mindrecord_dir))
else:
print("voc_dir not exits.")
else:
if os.path.isdir(config.image_dir) and os.path.exists(
config.anno_path):
print("Create Mindrecord.")
data_to_mindrecord_byte_image("other", True, prefix)
print("Create Mindrecord Done, at {}".format(mindrecord_dir))
else:
print("image_dir or anno_path not exits.")
if not args_opt.only_create_dataset:
loss_scale = float(args_opt.loss_scale)
# When create MindDataset, using the fitst mindrecord file, such as ssd.mindrecord0.
dataset = create_ssd_dataset(mindrecord_file,
repeat_num=1,
batch_size=args_opt.batch_size,
device_num=device_num,
rank=rank)
dataset_size = dataset.get_dataset_size()
print("Create dataset done!")
backbone = ssd_mobilenet_v2()
ssd = SSD300(backbone=backbone, config=config)
net = SSDWithLossCell(ssd, config)
init_net_param(net)
# checkpoint
ckpt_config = CheckpointConfig(save_checkpoint_steps=dataset_size *
args_opt.save_checkpoint_epochs)
ckpoint_cb = ModelCheckpoint(prefix="ssd",
directory=None,
config=ckpt_config)
if args_opt.pre_trained:
if args_opt.pre_trained_epoch_size <= 0:
raise KeyError(
"pre_trained_epoch_size must be greater than 0.")
param_dict = load_checkpoint(args_opt.pre_trained)
if args_opt.filter_weight:
filter_checkpoint_parameter(param_dict)
load_param_into_net(net, param_dict)
lr = Tensor(
get_lr(global_step=config.global_step,
lr_init=config.lr_init,
lr_end=config.lr_end_rate * args_opt.lr,
lr_max=args_opt.lr,
warmup_epochs=config.warmup_epochs,
total_epochs=args_opt.epoch_size,
steps_per_epoch=dataset_size))
opt = nn.Momentum(
filter(lambda x: x.requires_grad, net.get_parameters()), lr,
config.momentum, config.weight_decay, loss_scale)
net = TrainingWrapper(net, opt, loss_scale)
callback = [
TimeMonitor(data_size=dataset_size),
LossMonitor(), ckpoint_cb
]
model = Model(net)
dataset_sink_mode = False
if args_opt.mode == "sink":
print("In sink mode, one epoch return a loss.")
dataset_sink_mode = True
print(
"Start train SSD, the first epoch will be slower because of the graph compilation."
)
model.train(args_opt.epoch_size,
dataset,
callbacks=callback,
dataset_sink_mode=dataset_sink_mode)
config.coco_root = config.voc_root
if not os.path.exists(mindrecord_file):
if not os.path.isdir(mindrecord_dir):
os.makedirs(mindrecord_dir)
if args_opt.dataset == "coco":
if os.path.isdir(config.coco_root):
print("Create Mindrecord.")
data_to_mindrecord_byte_image("coco", False, prefix)
print("Create Mindrecord Done, at {}".format(mindrecord_dir))
else:
print("coco_root not exits.")
elif args_opt.dataset == "voc":
if os.path.isdir(config.voc_dir) and os.path.isdir(
config.voc_root):
print("Create Mindrecord.")
voc_data_to_mindrecord(mindrecord_dir, False, prefix)
print("Create Mindrecord Done, at {}".format(mindrecord_dir))
else:
print("voc_root or voc_dir not exits.")
else:
if os.path.isdir(config.image_dir) and os.path.exists(
config.anno_path):
print("Create Mindrecord.")
data_to_mindrecord_byte_image("other", False, prefix)
print("Create Mindrecord Done, at {}".format(mindrecord_dir))
else:
print("IMAGE_DIR or ANNO_PATH not exits.")
print("Start Eval!")
retinanet_eval(mindrecord_file, config.checkpoint_path)
