update for bakeup

tracking/utils/annotator.py

@@ -24,6 +24,8 @@ class TrackAnnotator(Annotator):
         frame_index: 帧索引，从 1 开始计数
         cls：类别编号，从 0 开始计数，用作 names 的 key 值
         """
+        
+        if track.size==0: return
     
         id, cls = track[0, 4],  track[0, 6]
         if id >=0 and cls==0:
@@ -51,6 +53,8 @@ class TrackAnnotator(Annotator):
         """
         绘制选定 track 的轨迹
         """
+        if track.size==0: return
+        
         x, y = int((track[0]+track[2])/2), int((track[1]+track[3])/2)
         
         cv2.circle(self.im, (x, y), 6, color, 2)