Active contour-based tracking has been widely used for tracking contours of objects with moving cameras.

基于主动轮廓的跟踪方法被广泛应用于移动摄像机下运动物体轮廓的跟踪。

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The experimental analysis shows: the visual-based tracking system fails to track when the camera moves too fast or the Marker is obscured.

通过实验分析表明：当摄像机移动过快或者标志物被遮挡时，基于视觉的跟踪技术存在跟踪失效的问题。

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A part-based tracking method is proposed to address the occlusion issue in object tracking by using parts of the object as the tracking objects.

针对视频序列中出现的遮挡等问题，提出了一种基于部件的对象跟踪方法。

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GPS-based tracking might have given the controller more time to adjust the flight path of the first lady's plane, said Voss.

CNN: Can technology fix the FAA's air traffic troubles?

Qualcomm started out making satellite-based tracking systems for trucking companies, but Irwin had far bigger plans:selling the world on a new digital way to connect cellular calls and carry 40 times as much traffic as the old analog systems then in place.

FORBES: Magazine Article

The industry has estimated that nearly 80% of online display ads are based on tracking data.

WSJ: Latest in Web Tracking: Stealthy 'Supercookies'