Update app.py

app.py

@@ -384,8 +384,14 @@ def detect_paper_bounds(image: np.ndarray, paper_size: str, output_unit: str = "
         paper_contour = expanded_contour
         
         # Calculate scaling factor based on paper size with proper units
-        scaling_factor = calculate_paper_scaling_factor(paper_contour, paper_size, output_unit)
-        
+        # scaling_factor = calculate_paper_scaling_factor(paper_contour, paper_size, output_unit)
+        scaling_factor = calculate_paper_scaling_factor_corrected(
+            paper_contour, 
+            paper_size, 
+            output_unit="mm",
+            correction_factor=0.82,  # Adjust this value
+            method="average"  # Try different methods
+)        
         return paper_contour, scaling_factor
         
     except Exception as e: