Update README.md

README.md

@@ -103,7 +103,7 @@ Download the dataset and prepare it in **LMDB** or **PNG** format using script.
 
 ```python
 # Resize to get 16×16 LR_IMGS and 128×128 HR_IMGS, then prepare 128×128 Fake SR_IMGS by bicubic interpolation
-python prepare.py  --path [dataset root]  --out [output root] --size 16,128 -l
+python data/prepare_data.py  --path [dataset root]  --out [output root] --size 16,128 -l
 ```
 
 then you need to change the datasets config to your data path and image resolution: