Update README.md

README.md

@@ -75,6 +75,36 @@ pip install tensorboardX
 pip install terminaltables
 ```
 
+## Dataset Preparation
+
+Download the [ImageNet-1K](http://image-net.org/) classification dataset and structure the data as follows:
+```
+/path/to/imagenet-1k/
+  train/
+    class1/
+      img1.jpeg
+    class2/
+      img2.jpeg
+  val/
+    class1/
+      img3.jpeg
+    class2/
+      img4.jpeg
+```
+
+For pre-training on [ImageNet-22K](http://image-net.org/), download the dataset and structure the data as follows:
+```
+/path/to/imagenet-22k/
+  class1/
+    img1.jpeg
+  class2/
+    img2.jpeg
+  class3/
+    img3.jpeg
+  class4/
+    img4.jpeg
+```
+
 ## Testing
 
 We give an example evaluation command  for VanillaNet-5: