CONSTANT K = 7

app.py

@@ -124,8 +124,9 @@ def _process_saree_core(base_image: Image.Image, pattern_image: Image.Image):
     mask_alpha = np.array(mask_img)[:, :, 3].astype(np.float32) / 255.0
 
     # 1. Slightly stronger shrink (balanced)
-    kernel = np.ones((5, 5), np.uint8)   # slightly larger kernel
-    mask_binary = (mask_alpha > 0.05).astype(np.uint8) * 255  # slightly stricter threshold
+    k =7
+    kernel = np.ones((k, k), np.uint8)   # slightly larger kernel
+    mask_binary = (mask_alpha > k/100).astype(np.uint8) * 255  # slightly stricter threshold
     mask_eroded = cv2.erode(mask_binary, kernel, iterations=3)  # balanced erosion