Using gaze tracking technique syncretized with head feature, eye feature and surrounding feature to judge drowsiness.

视线跟踪技术，融合头部特征、眼睛特征、环境特征等判断驾驶员疲劳的发生。

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Face tracking using KLT algorithm can reduce the impact caused by the tilt of the head, only the first detection of the human eye, after all detected feature points, computing speed.

人脸跟踪使用KLT算法。能够减少人头倾斜造成的影响，只有第一次检测人眼，以后都是检测特征点，运算速度快。- Use vision。

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The expectation the S4 will feature eye-tracking capability has been heightened by existing technology in the Galaxy S3 - the phone's Smart Stay function stops the screen from dimming when somebody is looking at it.

BBC: Samsung set for crucial Galaxy S4 smartphone launch

It may not quite do that - but the live demo of the new translation service looked very clever, as did the standout eye-tracking feature which enables you to pause a video by simply looking away, then restart it by focusing on the screen again.

BBC: Samsung's New Galaxy - goodbye Google?

Once a specific feature is selected via eye-tracking, thumb controls or gesture recognition can be used to select navigation, infotainment, audio, HVAC, and even smartphone connectivity functions.

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