Add pretrained arg to reference scripts (#935)

Allows for easily evaluating the pre-trained models in the modelzoo

references/classification/train.py

@@ -144,7 +144,7 @@ def main(args):
         sampler=test_sampler, num_workers=args.workers, pin_memory=True)
 
     print("Creating model")
-    model = torchvision.models.__dict__[args.model]()
+    model = torchvision.models.__dict__[args.model](pretrained=args.pretrained)
     model.to(device)
     if args.distributed and args.sync_bn:
         model = torch.nn.SyncBatchNorm.convert_sync_batchnorm(model)
@@ -242,6 +242,12 @@ def parse_args():
         help="Only test the model",
         action="store_true",
     )
+    parser.add_argument(
+        "--pretrained",
+        dest="pretrained",
+        help="Use pre-trained models from the modelzoo",
+        action="store_true",
+    )
 
     # distributed training parameters
     parser.add_argument('--world-size', default=1, type=int,

references/detection/train.py

@@ -76,7 +76,8 @@ def main(args):
         collate_fn=utils.collate_fn)
 
     print("Creating model")
-    model = torchvision.models.detection.__dict__[args.model](num_classes=num_classes)
+    model = torchvision.models.detection.__dict__[args.model](num_classes=num_classes,
+                                                              pretrained=args.pretrained)
     model.to(device)
 
     model_without_ddp = model
@@ -156,6 +157,12 @@ if __name__ == "__main__":
         help="Only test the model",
         action="store_true",
     )
+    parser.add_argument(
+        "--pretrained",
+        dest="pretrained",
+        help="Use pre-trained models from the modelzoo",
+        action="store_true",
+    )
 
     # distributed training parameters
     parser.add_argument('--world-size', default=1, type=int,

references/segmentation/train.py

@@ -121,7 +121,9 @@ def main(args):
         sampler=test_sampler, num_workers=args.workers,
         collate_fn=utils.collate_fn)
 
-    model = torchvision.models.segmentation.__dict__[args.model](num_classes=num_classes, aux_loss=args.aux_loss)
+    model = torchvision.models.segmentation.__dict__[args.model](num_classes=num_classes,
+                                                                 aux_loss=args.aux_loss,
+                                                                 pretrained=args.pretrained)
     model.to(device)
     if args.distributed:
         model = torch.nn.SyncBatchNorm.convert_sync_batchnorm(model)
@@ -205,6 +207,12 @@ def parse_args():
         help="Only test the model",
         action="store_true",
     )
+    parser.add_argument(
+        "--pretrained",
+        dest="pretrained",
+        help="Use pre-trained models from the modelzoo",
+        action="store_true",
+    )
     # distributed training parameters
     parser.add_argument('--world-size', default=1, type=int,
                         help='number of distributed processes')