Audit and suppress nested detector proposals

backend/tests/test_belgium_candidate_evaluation.py

@@ -26,3 +26,15 @@ def test_empty_reference_counts_false_positives() -> None:
 
 def test_box_scaling_preserves_center() -> None:
     assert MODULE.scale_box((10.0, 20.0, 30.0, 40.0), 1.5) == (5.0, 15.0, 35.0, 45.0)
+
+
+def test_containment_suppression_removes_nested_lower_score_box() -> None:
+    predictions = [
+        ((0.0, 0.0, 20.0, 20.0), 0.9),
+        ((5.0, 5.0, 15.0, 15.0), 0.8),
+        ((25.0, 0.0, 35.0, 10.0), 0.7),
+    ]
+    assert MODULE.suppress_contained_predictions(predictions, 0.8) == [
+        predictions[0],
+        predictions[2],
+    ]

backend/tests/test_retile_yolo_dataset.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+import importlib.util
+from pathlib import Path
+
+
+SCRIPT = Path(__file__).parents[2] / "scripts" / "retile_yolo_dataset.py"
+SPEC = importlib.util.spec_from_file_location("retile_yolo", SCRIPT)
+assert SPEC and SPEC.loader
+MODULE = importlib.util.module_from_spec(SPEC)
+SPEC.loader.exec_module(MODULE)
+
+
+def test_tile_starts_cover_edges_with_overlap() -> None:
+    assert MODULE.tile_starts(640, 384, 128) == [0, 256]
+    assert MODULE.tile_starts(700, 384, 128) == [0, 256, 316]
+
+
+def test_tile_starts_reject_image_smaller_than_tile() -> None:
+    assert MODULE.tile_starts(320, 384, 128) == []