Update README.md

README.md

@@ -175,6 +175,7 @@ We compare our methods with other SOTA huggingface models and list the result be
 
 laion_aesthetic(the higher the better)  
 perceptual similarity(the lower the better)
+Note: The values are calculate when saved in webp format, if you save in png format the aesthetic values will increase 0.1-0.3 but the relative relation remains unchanged.
 
 
 ## Training Details