Update app.py

app.py

@@ -1,7 +1,8 @@
 import gradio as gr
 
-def greet(name):
-    return "Hello " + name + "!!"
+def greet(image):
+    gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
+    return gray
 
-iface = gr.Interface(fn=greet, inputs="text", outputs="text")
+iface = gr.Interface(fn=greet, inputs="image", outputs="image")
 iface.launch()