运动估计的方法中，在基于多目标场景的平移运动中多采用分级块匹配的方法。
In the methods of Motion Estimation, we often use Multi-frame Block Matching if there are multi objects in the image.
然后，查看目标场景的 action 属性，并根据这个属性值更新（设置或相加）本地状态模型中的分数。
The score is updated by looking at the action attribute for the target scene and using this either to set or to add to the score in the local state model.
其利用摄像头对目标场景进行实时监控，并将采集获取的视频数据呈现在远程显示设备上，用以实施有效的安全控制。
By using video cameras, these systems real-time monitor the target scenes, sending the captured video data to the remote display so as to accomplish effective safety control.
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