close image after processing

app.py

@@ -102,8 +102,7 @@ def process_image(pil_image):
     ---------
     image: path of the image to be processed
     """
-    inp = pil_image
-    inp.load()
+    inp = Image.open(pil_image)
     img_exif = inp.getexif()
 
     # Get image size
@@ -145,6 +144,9 @@ def process_image(pil_image):
     bottom = (h + 224) // 2
     image = inp.crop((left, top, right, bottom))
 
+    # close image
+    inp.close()
+
     # Convert pil image to numpy array and scale color channels to [0, 1]
     np_image = np.array(image) / 255