Finding the distance of object from a logitech camera.

找到对象从罗技摄像头的距离。

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The method is particularly useful for the imaging system in which the conjugate distance of object and image is fixed.

该方法尤其适用于物像共轭距固定的成像系统。

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Determining where a distant object lies in space takes a bit of work, because the universe lacks clear distance markers.

由于宇宙中缺少明显的距离标识，在空间中确定一个遥远的物体的位置需要大量的工作。

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An asteroid as large as an Olympic swimming pool has raced past the Earth at a distance of just 27, 700km (17, 200mi) - the closest ever predicted for an object of that size.

BBC: Asteroid 2012 DA14 in record-breaking Earth pass

Scientists have played down suggestions that there is any link between the event in the Urals and 2012 DA14, an asteroid which raced past the Earth later on Friday at a distance of just 27, 700km (17, 200 miles) - the closest ever for an object of that size.

BBC: Meteorite fragments found in Russia's Urals region

The scanner itself consists of a digital camera with an on-board laser that determines the distance to the object, although it also apparently requires that targets be placed around the scene to properly scan the object -- or person, as the case may be.

ENGADGET: Industrial Research creates 3D crime scene/movie set scanner