Finally

rpi/services/detection_service.py

@@ -40,8 +40,10 @@ class DetectionService:
     def stop(self):
         self.camera.close()
 
-    def analyze_single_frame(self) -> tuple[np.ndarray, str | None]:
+    def analyze_single_frame(self) -> tuple[bytes, str | None]:
         frame = self.camera.take_photo()
+        encoded_frame = cv2.imencode('.jpg', frame, [int(cv2.IMWRITE_JPEG_QUALITY), 80])[1].tobytes()
+
         result = self.__run_complete_detection(frame)
 
         edges_prediction = result["edges"]
@@ -49,7 +51,7 @@ class DetectionService:
 
         processed_frame = self.board_manager.process_frame(edges_prediction[0], frame, self.scale_size)
         if processed_frame is None:
-            return frame, None
+            return encoded_frame, None
 
         warped_corners, matrix = processed_frame
 
@@ -57,7 +59,7 @@ class DetectionService:
 
         board = self.pieces_manager.pieces_to_board(detections, warped_corners, matrix, self.scale_size)
 
-        return pieces_prediction[0].plot(), self.pieces_manager.board_to_fen(board)
+        return encoded_frame, self.pieces_manager.board_to_fen(board)
 
     def __run_complete_detection(self, frame : np.ndarray, display=False) -> dict[str, list[Results]] :
         pieces_prediction = self.__run_pieces_detection(frame)

rpi/services/game_service.py

@@ -23,5 +23,5 @@ class GameService:
         self.clock_service.stop()
         self.detection_service.stop()
 
-    def make_move(self) -> tuple[np.ndarray, str]:
+    def make_move(self) -> tuple[bytes, str]:
         return self.detection_service.analyze_single_frame()