Fixed path formatting

rpi/services/detection_service.py

@@ -1,5 +1,6 @@
 import cv2
 import numpy as np
+from pathlib import Path
 from ultralytics.engine.results import Results
 
 from models.detection.detector import Detector
@@ -18,8 +19,11 @@ class DetectionService:
     scale_size : tuple[int, int]
 
     def __init__(self):
-        self.edges_detector = Detector("../assets/models/edges.pt")
-        self.pieces_detector = Detector("../assets/models/unified-nano-refined.pt")
+        current_file = Path(__file__).resolve()
+        project_root = current_file.parent.parent
+
+        self.edges_detector = Detector(project_root / "assets" / "models" / "edges.pt")
+        self.pieces_detector = Detector(project_root / "assets" / "models" / "unified-nano-refined.pt")
 
         self.pieces_manager = PiecesManager()
         self.board_manager = BoardManager()
@@ -96,4 +100,4 @@ if __name__ == "__main__" :
     fen = service.get_fen(image)
     print(fen)
 
-    service.run_complete_detection(image, display=True)
+    service.run_complete_detection(image, display=True)