feat: implement IncludeAnnotationTypeFilter

raillabel/filter/__init__.py

@@ -7,6 +7,7 @@
 from .exclude_frame_id_filter import ExcludeFrameIdFilter
 from .filter import filter_
 from .include_annotation_id_filter import IncludeAnnotationIdFilter
+from .include_annotation_type_filter import IncludeAnnotationTypeFilter
 from .include_frame_id_filter import IncludeFrameIdFilter
 from .start_time_filter import StartTimeFilter
 
@@ -18,4 +19,5 @@
     "EndTimeFilter",
     "IncludeAnnotationIdFilter",
     "ExcludeAnnotationIdFilter",
+    "IncludeAnnotationTypeFilter",
 ]

raillabel/filter/filter.py

@@ -13,11 +13,10 @@
 
 def filter_(scene: Scene, filters: list[_FilterAbc]) -> Scene:
     """Return a scene with filters applied to annotations, frame, sensors and objects."""
-    filtered_scene = Scene(
-        metadata=deepcopy(scene.metadata),
-        sensors=deepcopy(scene.sensors),
-        objects=deepcopy(scene.objects),
-    )
+    filtered_scene = Scene(metadata=deepcopy(scene.metadata))
+
+    used_sensor_ids = set()
+    used_object_ids = set()
 
     frame_filters, annotation_filters = _separate_filters(filters)
 
@@ -32,11 +31,26 @@ def filter_(scene: Scene, filters: list[_FilterAbc]) -> Scene:
         )
 
         for annotation_id, annotation in frame.annotations.items():
-            if _annotation_passes_all_filters(annotation_id, annotation, annotation_filters):
-                filtered_frame.annotations[annotation_id] = deepcopy(annotation)
+            if not _annotation_passes_all_filters(annotation_id, annotation, annotation_filters):
+                continue
+
+            filtered_frame.annotations[annotation_id] = deepcopy(annotation)
+            used_sensor_ids.add(annotation.sensor_id)
+            used_object_ids.add(annotation.object_id)
 
         filtered_scene.frames[frame_id] = filtered_frame
 
+    filtered_scene.sensors = {
+        sensor_id: deepcopy(sensor)
+        for sensor_id, sensor in scene.sensors.items()
+        if sensor_id in used_sensor_ids
+    }
+    filtered_scene.objects = {
+        object_id: deepcopy(object_)
+        for object_id, object_ in scene.objects.items()
+        if object_id in used_object_ids
+    }
+
     return filtered_scene
 
 

raillabel/filter/include_annotation_type_filter.py

@@ -0,0 +1,46 @@
+# Copyright DB InfraGO AG and contributors
+# SPDX-License-Identifier: Apache-2.0
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import Literal
+from uuid import UUID
+
+from raillabel.format import Bbox, Cuboid, Poly2d, Poly3d, Seg3d
+
+from ._filter_abc import _AnnotationLevelFilter
+
+
+@dataclass
+class IncludeAnnotationTypeFilter(_AnnotationLevelFilter):
+    """Filter out all annotations in the scene, that do NOT have the type (like bbox or cuboid)."""
+
+    annotation_types: (
+        set[Literal["bbox", "cuboid", "poly2d", "poly3d", "seg3d"]]
+        | list[Literal["bbox", "cuboid", "poly2d", "poly3d", "seg3d"]]
+    )
+
+    def passes_filter(self, _: UUID, annotation: Bbox | Cuboid | Poly2d | Poly3d | Seg3d) -> bool:
+        """Assess if an annotation passes this filter."""
+        annotation_type_str = None
+
+        if isinstance(annotation, Bbox):
+            annotation_type_str = "bbox"
+
+        elif isinstance(annotation, Cuboid):
+            annotation_type_str = "cuboid"
+
+        elif isinstance(annotation, Poly2d):
+            annotation_type_str = "poly2d"
+
+        elif isinstance(annotation, Poly3d):
+            annotation_type_str = "poly3d"
+
+        elif isinstance(annotation, Seg3d):
+            annotation_type_str = "seg3d"
+
+        else:
+            raise TypeError
+
+        return annotation_type_str in self.annotation_types

tests/filter/test_filter.py

@@ -92,5 +92,13 @@ def test_exclude_annotation_ids():
     )
 
 
+def test_include_annotation_type():
+    scene = SceneBuilder.empty().add_bbox().add_cuboid().result
+    filters = [raillabel.filter.IncludeAnnotationTypeFilter(["bbox"])]
+
+    actual = raillabel.filter.filter_(scene, filters)
+    assert actual == SceneBuilder.empty().add_bbox().result
+
+
 if __name__ == "__main__":
     pytest.main([__file__, "-vv"])