diff --git a/rebuild_by_epipolar_line.py b/rebuild_by_epipolar_line.py
index 99f7510..f712274 100644
--- a/rebuild_by_epipolar_line.py
+++ b/rebuild_by_epipolar_line.py
@@ -1031,11 +1031,11 @@ while True:
             tracking_detections = []
             for camera_name in affinities.keys():
                 indices_T = affinities[camera_name].indices_T.item()
-                indices_S = affinities[camera_name].indices_D.item()
+                indices_D = affinities[camera_name].indices_D.item()
                 match_tracking = affinities[camera_name].trackings[indices_T]
                 if match_tracking == element_tracking:
                     tracking_detections.append(
-                        affinities[camera_name].detections[indices_S]
+                        affinities[camera_name].detections[indices_D]
                     )
 
             # 判断2d检测数据数量是否可以更新跟踪目标