Update app.py

app.py

@@ -2,8 +2,8 @@ import gradio
 import cv2
 
 def greet(image, in_contrast, in_brightness):
-    in_contrast = in_contrast / 100*3
-    in_brightness = in_brightness
+    in_contrast = float(in_contrast) / 100*3
+    in_brightness = float(in_brightness)
     # contrast [1.0-3.0]
     # brightness [0-100]
     # https://docs.opencv.org/4.x/d3/dc1/tutorial_basic_linear_transform.html