fix double normalization

app.py

@@ -7,7 +7,7 @@ from kornia.core import Tensor
 def enhance(file, brightness, contrast, saturation, gamma, hue):      
     # load the image using the rust backend          
     img: Tensor = K.io.load_image(file.name, K.io.ImageLoadType.RGB32)
-    img = img[None] / 255.
+    img = img[None]  # 1xCxHxW / fp32 / [0, 1]
 
     # apply tensor image enhancement
     x_out: Tensor = K.enhance.adjust_brightness(img, float(brightness))