研究人员必须解决的一个重要的问题是，人眼的最小焦距是几厘米，无法分辨出隐形眼镜上显示的物体。
One major problem the researchers had to overcome was the fact that the human eye, with its minimum focal distance of several centimetres, cannot resolve objects on a contact lens.
测算你相机的安全快门速度有一个好的方法，你相机镜头焦距的倒数，就是你避免镜头抖动的快门最小值。
A good rule of thumb to minimise camera shake is to set the shutter speed at a minimum of one second divided by your focal length.
然后把摄像机内参数矩阵分解为有效焦距与主点位置两部分，并利用最小二乘法分别对其进行求解。
The intrinsic parameters are separated into two parts of focal length and coordinates for the principle point, which are then solved by using the least square method.
然后把摄像机内参数矩阵分解为有效焦距与主点位置两部分，并利用最小二乘法分别对其进行求解。
The intrinsic parameters are separated into two parts of focal length and coordinates for the principle point, which are then solved by using the least square method.
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