fix(table): ignore opaque matching fill+stroke rects under lines_strict

src/table.py

@@ -2546,9 +2546,18 @@ def clean_graphics(npaths=None):
             # and keep those items (see _is_batched_rule). They contribute no
             # enveloping bbox: bbox_paths holds only the paths whose own rect is
             # real graphics.
+            # A fill+stroke path whose stroke has the same color as its fill
+            # (both opaque) draws no visible border either, so it is treated
+            # like a fill-only path, e.g. white redaction boxes: issue #5175.
+            is_invisible_fs = (
+                p["type"] == "fs"
+                and p.get("fill") == p.get("color")
+                and p.get("fill_opacity") == 1
+                and p.get("stroke_opacity") == 1
+            )
             if (
                 lines_strict
-                and p["type"] == "f"
+                and (p["type"] == "f" or is_invisible_fs)
                 and p["rect"].width > snap_x
                 and p["rect"].height > snap_y
             ):

tests/test_tables.py

@@ -1962,3 +1962,37 @@ def test_find_tables_union_keeps_one_coherent_table_group_without_content_suppor
         assert (tables[0].row_count, tables[0].col_count) == (1, 2)
     finally:
         doc.close()
+
+
+def test_5175():
+    """lines_strict: an opaque fill+stroke rectangle whose stroke has the same
+    color as its fill draws no visible line and must not add a phantom row."""
+
+    def make_page(doc, color):
+        page = doc.new_page(width=600, height=350)
+        xs, ys = [50, 200, 300, 400, 500], [50, 100, 150, 200]
+        for x in xs:
+            page.draw_line((x, ys[0]), (x, ys[-1]), color=(0, 0, 0), width=0.5)
+        for y in ys:
+            page.draw_line((xs[0], y), (xs[-1], y), color=(0, 0, 0), width=0.5)
+        for row in range(3):
+            for col in range(4):
+                page.insert_text(
+                    (xs[col] + 10, ys[row] + 25), f"{row+1}:{col+1}", fontsize=10
+                )
+        page.draw_rect((301, 185, 313, 198), color=color, fill=(1, 1, 1), width=1)
+        return page
+
+    doc = pymupdf.open()
+    # same-colored (invisible) border: ignored like a fill-only rectangle
+    page = make_page(doc, (1, 1, 1))
+    tables = page.find_tables(strategy="lines_strict", use_layout=False).tables
+    assert len(tables) == 1
+    assert (tables[0].row_count, tables[0].col_count) == (3, 4)
+
+    # contrasting (visible) border: still contributes lines
+    page = make_page(doc, (0, 0, 0))
+    tables = page.find_tables(strategy="lines_strict", use_layout=False).tables
+    assert len(tables) == 1
+    assert tables[0].row_count == 4
+    doc.close()