Update app.py

app.py

@@ -154,7 +154,7 @@ class Dataset(BaseDataset):
         mask = cv2.imread(self.masks_fps, 0)
         mask[np.where(mask < 8)] = 0
         mask[np.where(mask > 8)] = 255
-        extract certain classes from mask (e.g. polyp)
+#        extract certain classes from mask (e.g. polyp)
         masks = [(mask == v) for v in self.class_values]
         mask = np.stack(masks, axis=-1).astype('float')