update raft optical flow

src/orisys/sensor.py

@@ -164,7 +164,7 @@ class Sensor:
         if not ret:
             print("Failed to get_img from video source.")
             return None
-        self.frame = frame
+        self.frame = frame.copy()
         # Convert to grayscale
         # gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
         gray = frame
@@ -215,8 +215,8 @@ class Sensor:
         if self.img is None:
             raise Exception("Warning: Get image first")
         
-        # flow = self.__tracker.track(self.img)
-        flow = self.__tracker.track_raft(self.img)
+        flow = self.__tracker.track(self.img)
+        # flow = self.__tracker.track_raft(self.img)
         if hasattr(flow, 'download'):
             flow = flow.download()
         self.flow = flow