TRUNCATED_WIDTH_RATIOをコンフィグ化してdefault.yamlから変更できるように

src/config_loader.py

@@ -183,6 +183,7 @@ class FaceSettings:
     roi_expand_ratio: float
     roi_square: bool
     roi_upscale_target: int
+    roi_truncated_width_ratio: float
     min_roi_width: int
     min_roi_height: int
     static_image_mode: bool
@@ -578,6 +579,8 @@ def _validate(config: AppConfig) -> None:
         raise ConfigurationError("face minimum ROI dimensions must be positive")
     if face.roi_upscale_target < 0 or not isinstance(face.roi_square, bool):
         raise ConfigurationError("face roi_square/roi_upscale_target is invalid")
+    if face.roi_truncated_width_ratio <= 0:
+        raise ConfigurationError("face roi_truncated_width_ratio must be positive")
     if not 0.0 <= face.min_detection_confidence <= 1.0 or not 0.0 <= face.min_tracking_confidence <= 1.0:
         raise ConfigurationError("face confidence thresholds must be in [0, 1]")
     pose = config.head_pose

src/face_geometry.py

@@ -3,8 +3,6 @@
 from .config_loader import FaceSettings
 from .models import FaceROI, TrackedPerson
 
-TRUNCATED_WIDTH_RATIO = 0.45
-
 def create_face_roi(person: TrackedPerson, frame_width: int, frame_height: int, config: FaceSettings) -> FaceROI | None:
     """Create a clipped upper-body ROI or return None when the track is ineligible."""
     if config.require_confirmed_track and not person.is_confirmed:
@@ -14,7 +12,7 @@ def create_face_roi(person: TrackedPerson, frame_width: int, frame_height: int,
     bbox = person.bbox
     candidate_height = bbox.height * config.roi_height_ratio
     if bbox.y2 >= frame_height - 2:
-        candidate_height = max(candidate_height, bbox.width * TRUNCATED_WIDTH_RATIO)
+        candidate_height = max(candidate_height, bbox.width * config.roi_truncated_width_ratio)
     expand_x = bbox.width * config.roi_expand_ratio
     expand_y = candidate_height * config.roi_expand_ratio
     y1 = max(0, round(bbox.y1 - expand_y))