Update app.py

app.py

@@ -22,7 +22,20 @@ def greet(image, name, is_morning, temperature):
     salutation = "Good morning" if is_morning else "Good evening"
     greeting = f"{salutation} {name}. It is {temperature} degrees today"
     celsius = (temperature - 32) * 5 / 9
-    return image, greeting, round(celsius, 2)
+
+    # contrast [1.0-3.0]
+    # brightness [0-100]
+    # https://docs.opencv.org/4.x/d3/dc1/tutorial_basic_linear_transform.html
+    in_contrast = 1.0
+    in_brightness = 50
+
+    for y in range(image.shape[0]):
+        for x in range(image.shape[1]):
+            for c in range(image.shape[2]):
+                new_image[y,x,c] = np.clip(in_contrast*image[y,x,c] + in_brightness, 0, 255)
+    
+    return new_image, greeting, round(celsius, 2)
+    
 
 demo = gr.Interface(
     fn=greet,