Fix bug

app.py

@@ -150,17 +150,21 @@ def make_qr(url="https://example.com", size=768, border=12, back_color="#FFFFFF"
     return img
 
 def prep_qr_upload_image(qr_upload: Image.Image, size: int = 768, blur_radius: float = 0.0) -> Image.Image:
-    # Ensure it's grayscale or binary-like
+    # Step 1: grayscale
     im = qr_upload.convert("L")
-    
-    # Resize to target size, keeping sharp block edges
+
+    # Step 2: binarize (make it black & white only)
+    threshold = 180
+    im = im.point(lambda p: 255 if p > threshold else 0, mode="1")
+
+    # Step 3: resize (sharp edges preserved)
     im = im.resize((size, size), Image.NEAREST)
-    
-    # Convert back to RGB (ControlNet likes 3-channel)
+
+    # Step 4: back to RGB
     im = im.convert("RGB")
-    
-    # Optional Gaussian blur for softer edges
-    if blur_radius and blur_radius > 0:
+
+    # Step 5: optional blur (soften edges if desired)
+    if blur_radius > 0:
         im = im.filter(ImageFilter.GaussianBlur(radius=float(blur_radius)))
 
     return im
@@ -217,7 +221,7 @@ def get_qr_cn():
     global _CN_QR
     if _CN_QR is None:
         _CN_QR = ControlNetModel.from_pretrained(
-            CN_QRMON, torch_dtype=DTYPE, use_safetensors=True, token=HF_TOKEN
+            CN_QRMON, torch_dtype=DTYPE, use_safetensors=False, token=HF_TOKEN
         )
     return _CN_QR