import argparse import time from models import * from utils.datasets import * from utils.utils import * parser = argparse.ArgumentParser() parser.add_argument('-epochs', type=int, default=160, help='number of epochs') parser.add_argument('-batch_size', type=int, default=12, help='size of each image batch') parser.add_argument('-data_config_path', type=str, default='cfg/coco.data', help='data config file path') parser.add_argument('-cfg', type=str, default='cfg/yolov3.cfg', help='cfg file path') parser.add_argument('-img_size', type=int, default=32 * 13, help='size of each image dimension') parser.add_argument('-resume', default=False, help='resume training flag') opt = parser.parse_args() print(opt) cuda = torch.cuda.is_available() device = torch.device('cuda:0' if cuda else 'cpu') random.seed(0) np.random.seed(0) torch.manual_seed(0) if cuda: torch.cuda.manual_seed(0) torch.cuda.manual_seed_all(0) torch.backends.cudnn.benchmark = True def main(opt): os.makedirs('checkpoints', exist_ok=True) # Configure run data_config = parse_data_config(opt.data_config_path) num_classes = int(data_config['classes']) if platform == 'darwin': # macos train_path = data_config['valid'] else: # linux (gcp cloud) train_path = '../coco/trainvalno5k.txt' # Initialize model model = Darknet(opt.cfg, opt.img_size) # Get dataloader dataloader = ListDataset(train_path, batch_size=opt.batch_size, img_size=opt.img_size) # reload saved optimizer state start_epoch = 0 best_loss = float('inf') if opt.resume: checkpoint = torch.load('checkpoints/latest.pt', map_location='cpu') model.load_state_dict(checkpoint['model']) if torch.cuda.device_count() > 1: print('Using ', torch.cuda.device_count(), ' GPUs') model = nn.DataParallel(model) model.to(device).train() # # Transfer learning # for i, (name, p) in enumerate(model.named_parameters()): # #name = name.replace('module_list.', '') # #print('%4g %70s %9s %12g %20s %12g %12g' % ( # # i, name, p.requires_grad, p.numel(), list(p.shape), p.mean(), p.std())) # if p.shape[0] != 650: # not YOLO layer # p.requires_grad = False # Set optimizer # optimizer = torch.optim.SGD(model.parameters(), lr=.001, momentum=.9, weight_decay=0.0005 * 0, nesterov=True) # optimizer = torch.optim.Adam(filter(lambda p: p.requires_grad, model.parameters())) optimizer = torch.optim.Adam(model.parameters()) optimizer.load_state_dict(checkpoint['optimizer']) start_epoch = checkpoint['epoch'] + 1 best_loss = checkpoint['best_loss'] del checkpoint # current, saved else: if torch.cuda.device_count() > 1: print('Using ', torch.cuda.device_count(), ' GPUs') model = nn.DataParallel(model) model.to(device).train() optimizer = torch.optim.Adam(filter(lambda p: p.requires_grad, model.parameters()), lr=1e-4, weight_decay=5e-4) # Set scheduler # scheduler = torch.optim.lr_scheduler.CosineAnnealingLR(optimizer, 24, eta_min=0.00001, last_epoch=-1) # y = 0.001 * exp(-0.00921 * x) # 1e-4 @ 250, 1e-5 @ 500 # scheduler = torch.optim.lr_scheduler.ExponentialLR(optimizer, gamma=0.99082, last_epoch=start_epoch - 1) modelinfo(model) t0, t1 = time.time(), time.time() print('%10s' * 16 % ( 'Epoch', 'Batch', 'x', 'y', 'w', 'h', 'conf', 'cls', 'total', 'P', 'R', 'nGT', 'TP', 'FP', 'FN', 'time')) for epoch in range(opt.epochs): epoch += start_epoch # img_size = random.choice(range(10, 20)) * 32 # dataloader = ListDataset(train_path, batch_size=opt.batch_size, img_size=img_size) # print('Running image size %g' % img_size) # Update scheduler # if epoch % 25 == 0: # scheduler.last_epoch = -1 # for cosine annealing, restart every 25 epochs # scheduler.step() # if epoch <= 100: # for g in optimizer.param_groups: # g['lr'] = 0.0005 * (0.992 ** epoch) # 1/10 th every 250 epochs # g['lr'] = 0.001 * (0.9773 ** epoch) # 1/10 th every 100 epochs # g['lr'] = 0.0005 * (0.955 ** epoch) # 1/10 th every 50 epochs # g['lr'] = 0.0005 * (0.926 ** epoch) # 1/10 th every 30 epochs ui = -1 rloss = defaultdict(float) # running loss metrics = torch.zeros(4, num_classes) for i, (imgs, targets) in enumerate(dataloader): n = opt.batch_size # number of pictures at a time for j in range(int(len(imgs) / n)): targets_j = targets[j * n:j * n + n] nGT = sum([len(x) for x in targets_j]) if nGT < 1: continue loss = model(imgs[j * n:j * n + n].to(device), targets_j, requestPrecision=True, epoch=epoch) optimizer.zero_grad() loss.backward() optimizer.step() ui += 1 metrics += model.losses['metrics'] for key, val in model.losses.items(): rloss[key] = (rloss[key] * ui + val) / (ui + 1) # Precision precision = metrics[0] / (metrics[0] + metrics[1] + 1e-16) k = (metrics[0] + metrics[1]) > 0 if k.sum() > 0: mean_precision = precision[k].mean() else: mean_precision = 0 # Recall recall = metrics[0] / (metrics[0] + metrics[2] + 1e-16) k = (metrics[0] + metrics[2]) > 0 if k.sum() > 0: mean_recall = recall[k].mean() else: mean_recall = 0 s = ('%10s%10s' + '%10.3g' * 14) % ( '%g/%g' % (epoch, opt.epochs - 1), '%g/%g' % (i, len(dataloader) - 1), rloss['x'], rloss['y'], rloss['w'], rloss['h'], rloss['conf'], rloss['cls'], rloss['loss'], mean_precision, mean_recall, model.losses['nGT'], model.losses['TP'], model.losses['FP'], model.losses['FN'], time.time() - t1) t1 = time.time() print(s) # if i == 1: # return # Write epoch results with open('results.txt', 'a') as file: file.write(s + '\n') # Update best loss loss_per_target = rloss['loss'] / rloss['nGT'] if loss_per_target < best_loss: best_loss = loss_per_target # Save latest checkpoint checkpoint = {'epoch': epoch, 'best_loss': best_loss, 'model': model.state_dict(), 'optimizer': optimizer.state_dict()} torch.save(checkpoint, 'checkpoints/latest.pt') # Save best checkpoint if best_loss == loss_per_target: os.system('cp checkpoints/latest.pt checkpoints/best.pt') # Save backup checkpoint if (epoch > 0) & (epoch % 10 == 0): os.system('cp checkpoints/latest.pt checkpoints/backup' + str(epoch) + '.pt') # Save final model dt = time.time() - t0 print('Finished %g epochs in %.2fs (%.2fs/epoch)' % (epoch, dt, dt / (epoch + 1))) if __name__ == '__main__': torch.cuda.empty_cache() main(opt) torch.cuda.empty_cache()