Based on a more practical and general fault model of the actuator, a sufficient condition about reliable tracking control is obtained by the region pole assignment theory.
在更一般、更实际的执行器故障模型的基础上，根据区域极点配置理论。给出了系统输出信号渐近跟踪参考输入信号的可靠跟踪控制器存在的充分条件。
Firstly, the tracking window based on face region was initialized in detecting process. Then, color hue information model was established to track the follow-up frame.
利用检测过程中人脸区域初始化跟踪窗口，建立肤色的色调信息模型对后续帧进行跟踪。
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