Update app.py

app.py

@@ -389,7 +389,7 @@ def detect_paper_bounds(image: np.ndarray, paper_size: str, output_unit: str = "
             paper_contour, 
             paper_size, 
             output_unit="mm",
-            correction_factor=1.219,  # Adjust this value
+            correction_factor=1.225,  # Adjust this value
             method="average"  # Try different methods
 )        
         return paper_contour, scaling_factor