Update inference script for new loader style

inference.py

@@ -10,10 +10,10 @@ import time
 import argparse
 import numpy as np
 import torch
-import torch.utils.data as data
 
-from models import create_model, transforms_imagenet_eval
-from dataset import Dataset
+from models import create_model
+from data import Dataset, create_loader, get_model_meanstd
+from utils import AverageMeter
 
 
 parser = argparse.ArgumentParser(description='PyTorch ImageNet Inference')
@@ -70,14 +70,15 @@ def main():
     else:
         model = model.cuda()
 
-    dataset = Dataset(
-        args.data,
-        transforms_imagenet_eval(args.model, args.img_size))
-
-    loader = data.DataLoader(
-        dataset,
-        batch_size=args.batch_size, shuffle=False,
-        num_workers=args.workers, pin_memory=True)
+    data_mean, data_std = get_model_meanstd(args.model)
+    loader = create_loader(
+        Dataset(args.data),
+        img_size=args.img_size,
+        batch_size=args.batch_size,
+        use_prefetcher=True,
+        mean=data_mean,
+        std=data_std,
+        num_workers=args.workers)
 
     model.eval()
 
@@ -103,31 +104,12 @@ def main():
     top5_ids = np.concatenate(top5_ids, axis=0).squeeze()
 
     with open(os.path.join(args.output_dir, './top5_ids.csv'), 'w') as out_file:
-        filenames = dataset.filenames()
+        filenames = loader.dataset.filenames()
         for filename, label in zip(filenames, top5_ids):
             filename = os.path.basename(filename)
             out_file.write('{0},{1},{2},{3},{4},{5}\n'.format(
                 filename, label[0], label[1], label[2], label[3], label[4]))
 
 
-class AverageMeter(object):
-    """Computes and stores the average and current value"""
-
-    def __init__(self):
-        self.reset()
-
-    def reset(self):
-        self.val = 0
-        self.avg = 0
-        self.sum = 0
-        self.count = 0
-
-    def update(self, val, n=1):
-        self.val = val
-        self.sum += val * n
-        self.count += n
-        self.avg = self.sum / self.count
-
-
 if __name__ == '__main__':
     main()