Margin detection update

tests/test_margin_benchmark.py

@@ -39,6 +39,11 @@ class MarginBenchmarkTests(unittest.TestCase):
                                  case['sha256'])
                 self.assertEqual([p['page'] for p in case['pages']], list(range(1, case['page_count'] + 1)))
                 self.assertTrue(case['explanation'])
+                name_box = case['name_localization']['box_px']
+                self.assertEqual(case['name_localization']['page_height_px'],
+                                 case['recorded_schema']['page_crops'][0]['height_px'])
+                self.assertAlmostEqual(case['name_bottom_height_fraction'],
+                                       name_box[3] / case['name_localization']['page_height_px'])
                 self.assertTrue(any(p['labels'] for p in case['pages']))
                 for expected, recorded in zip(case['pages'], case['recorded_schema']['page_crops'], strict=True):
                     start = round(expected['suggested_start_mm'] * 200 / 25.4)