patch tiny white gaps

app.py

@@ -125,10 +125,11 @@ def prepare_image_and_mask(image, width, height, overlap_percentage, resize_opti
     mask_draw = ImageDraw.Draw(mask)
 
     # Calculate overlap areas
-    left_overlap = margin_x + overlap_x if overlap_left else margin_x
-    right_overlap = margin_x + new_width - overlap_x if overlap_right else margin_x + new_width
-    top_overlap = margin_y + overlap_y if overlap_top else margin_y
-    bottom_overlap = margin_y + new_height - overlap_y if overlap_bottom else margin_y + new_height
+    white_gaps_patch = 2
+    left_overlap = margin_x + overlap_x if overlap_left else margin_x + white_gaps_patch
+    right_overlap = margin_x + new_width - overlap_x if overlap_right else margin_x + new_width + white_gaps_patch
+    top_overlap = margin_y + overlap_y if overlap_top else margin_y + white_gaps_patch
+    bottom_overlap = margin_y + new_height - overlap_y if overlap_bottom else margin_y + new_height + white_gaps_patch
 
     # Draw the mask
     mask_draw.rectangle([