In the machine vision application, geometrical distortion in optical lens imaging is inevitable.

在机器视觉应用中，摄像机光学系统产生的图像存在不同程度的几何畸变。

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According to the reasons for the geometrical distortion of digital images, an auto-correction method is proposed.

通过分析数字图像几何畸变产生的机制，提出一种数字图像几何畸变自动校正的方法。

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As far as a vision system is concerned, its accuracy is affected mainly by noise, system resolution and geometrical distortion.

对于视觉系统来说，影响精度的因素主要有图像噪声、系统分辨率和几何畸变。

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And that geometrical prediction was confirmed directly by the Sloan survey, using the known distances of 500m light years to the density peak and 13 billion light years to the region where the microwave background originates as reference points to look for geometrical distortion, in the way that a more traditional land survey might use triangulation points.

ECONOMIST: Astronomy