实验结果表明HMM方法对具有时空特性的动态手势轨迹识别是非常有效的。
The experiment results show the HMM is very efficient to the dynamic gesture track recognition with the space-time characteristic.
一束由发光二极管发射出的红外线光立刻进入到使用者眼前的空间，这样一个小型摄像机装置，可分析人们的手势轨迹。
A ring of LEDs projects infrared light into the space immediately in front of the user so a camera in the device can interpret gestures.
这里有个无可争议的加分点，轨迹板支持多点触控手势，可以实现常用的双指滚动。
A definite bonus here is that the trackpad area responds to multi-touch gestures in the form of the always popular two-finger scroll.
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