Fix scikit-image import: footprint_rectangle -> rectangle

pdf_comparator.py

@@ -13,7 +13,7 @@ import numpy as np
 from PIL import Image, ImageChops, ImageDraw, UnidentifiedImageError
 from pdf2image import convert_from_path
 from skimage.measure import label, regionprops
-from skimage.morphology import dilation, footprint_rectangle
+from skimage.morphology import dilation, rectangle
 import gradio as gr
 
 # Optional features
@@ -68,7 +68,7 @@ def find_diff_boxes(diff_img: Image.Image, threshold: int = 12, min_area: int =
     arr = np.asarray(diff_img).astype(np.uint16)
     gray = arr.max(axis=2).astype(np.uint8)
     mask = (gray >= threshold).astype(np.uint8)
-    mask = dilation(mask, footprint_rectangle((3, 3)))
+    mask = dilation(mask, rectangle(3, 3))
     labeled = label(mask, connectivity=2)
     out: List[Box] = []
     for p in regionprops(labeled):