make white qr code 50% transparent

app.py

@@ -44,16 +44,15 @@ pipe.enable_xformers_memory_efficient_attention()
 
 
 def resize_for_condition_image(input_image: Image.Image, resolution: int, canvas_width: int = None, canvas_height: int = None):
-    input_image = input_image.convert("RGBA")  # Ensure the image has an alpha channel
+    input_image = input_image.convert("RGBA")
     W, H = input_image.size
 
-    # Create a blank canvas with the specified dimensions
+    # Create a blank canvas with the specified dimensions and 50% transparent white background
     if canvas_width is None:
         canvas_width = W
     if canvas_height is None:
         canvas_height = H
 
-    # Transparent canvas
     canvas = Image.new("RGBA", (canvas_width, canvas_height), (255, 255, 255, 0))
 
     # Determine the relative size of the QR code based on the canvas dimensions
@@ -74,6 +73,8 @@ def resize_for_condition_image(input_image: Image.Image, resolution: int, canvas
     return canvas
 
 
+
+
 SAMPLER_MAP = {
     "DPM++ Karras SDE": lambda config: DPMSolverMultistepScheduler.from_config(config, use_karras=True, algorithm_type="sde-dpmsolver++"),
     "DPM++ Karras": lambda config: DPMSolverMultistepScheduler.from_config(config, use_karras=True),
@@ -120,7 +121,16 @@ def inference(
         qr.add_data(qr_code_content)
         qr.make(fit=True)
 
-        qrcode_image = qr.make_image(fill_color="black", back_color=None).convert("RGBA")
+        qrcode_image = qr.make_image(fill_color="black", back_color="white").convert("RGBA")
+
+        # Add 50% transparency to the white background
+        data = qrcode_image.getdata()
+        new_data = [
+            (item[0], item[1], item[2], 128) if item[:3] == (255, 255, 255) else item
+            for item in data
+        ]
+        qrcode_image.putdata(new_data)
+
         qrcode_image = resize_for_condition_image(qrcode_image, 768, width, height)
     else:
         print("Using QR Code Image")