Update preprocessing.py

preprocessing.py

@@ -15,3 +15,11 @@ def normalize_image(img):
 
 def to_3channel(img):
     return np.stack([img, img, img], axis=-1)
+
+def preprocess_dicom(path):
+    img = load_dicom_image(path)
+    img = resize_image(img)
+    img = normalize_image(img)
+    img = to_3channel(img)
+    img = np.expand_dims(img, axis=0)
+    return img