Add auditable SAM roof label refinement

backend/tests/test_regional_yolo_dataset.py

@@ -0,0 +1,33 @@
+from __future__ import annotations
+
+import importlib.util
+from pathlib import Path
+
+
+SCRIPT = Path(__file__).parents[2] / "scripts" / "build_regional_yolo_dataset.py"
+SPEC = importlib.util.spec_from_file_location("regional_yolo_dataset", SCRIPT)
+assert SPEC and SPEC.loader
+MODULE = importlib.util.module_from_spec(SPEC)
+SPEC.loader.exec_module(MODULE)
+
+
+def test_select_paths_is_region_and_split_safe() -> None:
+    manifest = {
+        "samples": [
+            {"sample_slug": "f-train", "region": "flanders", "split": "train"},
+            {"sample_slug": "f-val", "region": "flanders", "split": "val"},
+            {"sample_slug": "f-test", "region": "flanders", "split": "test"},
+            {"sample_slug": "w-train", "region": "wallonia", "split": "train"},
+        ]
+    }
+    summary = {
+        "tiles": [
+            {"sample_slug": "f-train", "split": "train", "image_path": "/f-train.png"},
+            {"sample_slug": "f-val", "split": "val", "image_path": "/f-val.png"},
+            {"sample_slug": "f-test", "split": "val", "image_path": "/f-test.png"},
+            {"sample_slug": "w-train", "split": "train", "image_path": "/w-train.png"},
+        ]
+    }
+    train, val = MODULE.select_paths(summary, manifest, "flanders")
+    assert train == ["/f-train.png"]
+    assert val == ["/f-val.png"]

backend/tests/test_sam_roof_label_refinement.py

@@ -0,0 +1,23 @@
+from __future__ import annotations
+
+import importlib.util
+from pathlib import Path
+
+
+SCRIPT = Path(__file__).parents[2] / "scripts" / "refine_yolo_labels_with_sam.py"
+SPEC = importlib.util.spec_from_file_location("sam_roof_refinement", SCRIPT)
+assert SPEC and SPEC.loader
+MODULE = importlib.util.module_from_spec(SPEC)
+SPEC.loader.exec_module(MODULE)
+
+
+def test_plausible_refinement_is_fail_closed() -> None:
+    source = (10.0, 10.0, 30.0, 30.0)
+    assert MODULE.plausible_refinement(source, (8.0, 9.0, 31.0, 32.0), min_iou=0.15, min_area_ratio=0.25, max_area_ratio=4.0)
+    assert not MODULE.plausible_refinement(source, (100.0, 100.0, 120.0, 120.0), min_iou=0.15, min_area_ratio=0.25, max_area_ratio=4.0)
+    assert not MODULE.plausible_refinement(source, (0.0, 0.0, 100.0, 100.0), min_iou=0.15, min_area_ratio=0.25, max_area_ratio=4.0)
+
+
+def test_yolo_round_trip_shape() -> None:
+    line = MODULE.yolo_line((10.0, 20.0, 30.0, 40.0), 100, 100)
+    assert line == "0 0.20000000 0.30000000 0.20000000 0.20000000"