double-image signals

例句：

1. 1. The double-image signals are usedto detect the presence of an object ina room.
   这些双像信号被用来检测房间中物体的存在。
2. 2. The double-image signals were usedto enhance the quality of thevideo.
   这些双像信号被用来提高视频的质量。
3. 3. The double-image signals wereused to improve the accuracy of the robot's vision system.
   这些双像信号被用来提高机器人视觉系统的精度。