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train-msr.py
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train-msr.py
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from __future__ import print_function
import datetime
import os
import time
import sys
import numpy as np
import torch
import torch.utils.data
from torch.utils.data.dataloader import default_collate
from torch import nn
import torch.nn.functional as F
import torchvision
from torchvision import transforms
import utils
from datasets.msr import MSRAction3D
import models.sequence_classification as Models
def train_one_epoch(model, criterion, optimizer, lr_scheduler, data_loader, device, epoch, print_freq):
model.train()
metric_logger = utils.MetricLogger(delimiter=" ")
metric_logger.add_meter('lr', utils.SmoothedValue(window_size=1, fmt='{value}'))
metric_logger.add_meter('clips/s', utils.SmoothedValue(window_size=10, fmt='{value:.3f}'))
header = 'Epoch: [{}]'.format(epoch)
for clip, target, _ in metric_logger.log_every(data_loader, print_freq, header):
start_time = time.time()
clip, target = clip.to(device), target.to(device)
output = model(clip)
loss = criterion(output, target)
optimizer.zero_grad()
loss.backward()
optimizer.step()
acc1, acc5 = utils.accuracy(output, target, topk=(1, 5))
batch_size = clip.shape[0]
metric_logger.update(loss=loss.item(), lr=optimizer.param_groups[0]["lr"])
metric_logger.meters['acc1'].update(acc1.item(), n=batch_size)
metric_logger.meters['acc5'].update(acc5.item(), n=batch_size)
metric_logger.meters['clips/s'].update(batch_size / (time.time() - start_time))
lr_scheduler.step()
sys.stdout.flush()
def evaluate(model, criterion, data_loader, device):
model.eval()
metric_logger = utils.MetricLogger(delimiter=" ")
header = 'Test:'
video_prob = {}
video_label = {}
with torch.no_grad():
for clip, target, video_idx in metric_logger.log_every(data_loader, 100, header):
clip = clip.to(device, non_blocking=True)
target = target.to(device, non_blocking=True)
output = model(clip)
loss = criterion(output, target)
acc1, acc5 = utils.accuracy(output, target, topk=(1, 5))
prob = F.softmax(input=output, dim=1)
# FIXME need to take into account that the datasets
# could have been padded in distributed setup
batch_size = clip.shape[0]
target = target.cpu().numpy()
video_idx = video_idx.cpu().numpy()
prob = prob.cpu().numpy()
for i in range(0, batch_size):
idx = video_idx[i]
if idx in video_prob:
video_prob[idx] += prob[i]
else:
video_prob[idx] = prob[i]
video_label[idx] = target[i]
metric_logger.update(loss=loss.item())
metric_logger.meters['acc1'].update(acc1.item(), n=batch_size)
metric_logger.meters['acc5'].update(acc5.item(), n=batch_size)
# gather the stats from all processes
metric_logger.synchronize_between_processes()
print(' * Clip Acc@1 {top1.global_avg:.3f} Clip Acc@5 {top5.global_avg:.3f}'.format(top1=metric_logger.acc1, top5=metric_logger.acc5))
# video level prediction
video_pred = {k: np.argmax(v) for k, v in video_prob.items()}
pred_correct = [video_pred[k]==video_label[k] for k in video_pred]
total_acc = np.mean(pred_correct)
class_count = [0] * data_loader.dataset.num_classes
class_correct = [0] * data_loader.dataset.num_classes
for k, v in video_pred.items():
label = video_label[k]
class_count[label] += 1
class_correct[label] += (v==label)
class_acc = [c/float(s) for c, s in zip(class_correct, class_count)]
print(' * Video Acc@1 %f'%total_acc)
print(' * Class Acc@1 %s'%str(class_acc))
return total_acc
def main(args):
if args.output_dir:
utils.mkdir(args.output_dir)
print(args)
print("torch version: ", torch.__version__)
print("torchvision version: ", torchvision.__version__)
np.random.seed(args.seed)
torch.manual_seed(args.seed)
torch.cuda.manual_seed(args.seed)
torch.backends.cudnn.deterministic = True
torch.backends.cudnn.benchmark = False
device = torch.device('cuda')
# Data loading code
print("Loading data")
st = time.time()
dataset = MSRAction3D(
root=args.data_path,
frames_per_clip=args.clip_len,
frame_inverval=args.frame_inverval,
num_points=args.num_points,
train=True
)
dataset_test = MSRAction3D(
root=args.data_path,
frames_per_clip=args.clip_len,
frame_inverval=args.frame_inverval,
num_points=args.num_points,
train=False
)
print("Creating data loaders")
data_loader = torch.utils.data.DataLoader(dataset, batch_size=args.batch_size, shuffle=True, num_workers=args.workers, pin_memory=True)
data_loader_test = torch.utils.data.DataLoader(dataset_test, batch_size=args.batch_size, num_workers=args.workers, pin_memory=True)
print("Creating model")
Model = getattr(Models, args.model)
model = Model(radius=args.radius, nsamples=args.nsamples, num_classes=dataset.num_classes)
if torch.cuda.device_count() > 1:
model = nn.DataParallel(model)
model.to(device)
criterion = nn.CrossEntropyLoss()
lr = args.lr
optimizer = torch.optim.SGD(model.parameters(), lr=lr, momentum=args.momentum, weight_decay=args.weight_decay)
# convert scheduler to be per iteration, not per epoch, for warmup that lasts
# between different epochs
warmup_iters = args.lr_warmup_epochs * len(data_loader)
lr_milestones = [len(data_loader) * m for m in args.lr_milestones]
lr_scheduler = utils.WarmupMultiStepLR(optimizer, milestones=lr_milestones, gamma=args.lr_gamma, warmup_iters=warmup_iters, warmup_factor=1e-5)
model_without_ddp = model
if args.resume:
checkpoint = torch.load(args.resume, map_location='cpu')
model_without_ddp.load_state_dict(checkpoint['model'])
optimizer.load_state_dict(checkpoint['optimizer'])
lr_scheduler.load_state_dict(checkpoint['lr_scheduler'])
args.start_epoch = checkpoint['epoch'] + 1
print("Start training")
start_time = time.time()
acc = 0
for epoch in range(args.start_epoch, args.epochs):
train_one_epoch(model, criterion, optimizer, lr_scheduler, data_loader, device, epoch, args.print_freq)
acc = max(acc, evaluate(model, criterion, data_loader_test, device=device))
if args.output_dir:
checkpoint = {
'model': model_without_ddp.state_dict(),
'optimizer': optimizer.state_dict(),
'lr_scheduler': lr_scheduler.state_dict(),
'epoch': epoch,
'args': args}
utils.save_on_master(
checkpoint,
os.path.join(args.output_dir, 'model_{}.pth'.format(epoch)))
utils.save_on_master(
checkpoint,
os.path.join(args.output_dir, 'checkpoint.pth'))
total_time = time.time() - start_time
total_time_str = str(datetime.timedelta(seconds=int(total_time)))
print('Training time {}'.format(total_time_str))
print('Accuracy {}'.format(acc))
def parse_args():
import argparse
parser = argparse.ArgumentParser(description='PSTNet Training')
parser.add_argument('--data-path', default='data/MSR-Action3D', type=str, help='dataset')
parser.add_argument('--seed', default=0, type=int, help='random seed')
parser.add_argument('--model', default='MSRAction', type=str, help='model')
parser.add_argument('--radius', default=0.5, type=float, help='radius for the ball query')
parser.add_argument('--nsamples', default=9, type=int, help='number of neighbors for the ball query')
parser.add_argument('--clip-len', default=16, type=int, metavar='N', help='number of frames per clip')
parser.add_argument('--frame-interval', default=1, type=int, metavar='N', help='interval between sampled frames')
parser.add_argument('--num-points', default=2048, type=int, metavar='N', help='number of points per frame')
parser.add_argument('-b', '--batch-size', default=16, type=int)
parser.add_argument('--epochs', default=35, type=int, metavar='N', help='number of total epochs to run')
parser.add_argument('-j', '--workers', default=10, type=int, metavar='N', help='number of data loading workers (default: 16)')
parser.add_argument('--lr', default=0.01, type=float, help='initial learning rate')
parser.add_argument('--momentum', default=0.9, type=float, metavar='M', help='momentum')
parser.add_argument('--wd', '--weight-decay', default=1e-4, type=float, metavar='W', help='weight decay (default: 1e-4)', dest='weight_decay')
parser.add_argument('--lr-milestones', nargs='+', default=[20, 30], type=int, help='decrease lr on milestones')
parser.add_argument('--lr-gamma', default=0.1, type=float, help='decrease lr by a factor of lr-gamma')
parser.add_argument('--lr-warmup-epochs', default=10, type=int, help='number of warmup epochs')
parser.add_argument('--print-freq', default=10, type=int, help='print frequency')
parser.add_argument('--output-dir', default='output/MAR-Action3D', type=str, help='path where to save')
parser.add_argument('--resume', default='', help='resume from checkpoint')
parser.add_argument('--start-epoch', default=0, type=int, metavar='N', help='start epoch')
args = parser.parse_args()
return args
if __name__ == "__main__":
args = parse_args()
main(args)