Update README.md

README.md

@@ -74,4 +74,5 @@ NOTE: multiple splits download is not yet supported.
 python download_coconut.py --split relabeled_coco_val --output_dir relabeled_coco_val
 ```
 
-4. Go to our offical github repo for detailed usage instruction: https://github.com/bytedance/coconut_cvpr2024
+4. The mask images are nearly black as we use continuous segment ids for each image, you can use [github visualization tutorial](https://github.com/bytedance/coconut_cvpr2024/blob/main/tutorials/visualization/demo.ipynb) to create colorful masks for viewing.
+Please go to our offical github repo for detailed usage instruction: https://github.com/bytedance/coconut_cvpr2024