光切法是利用光切原理来测量表面粗糙度的一种测量方法，常用仪器是光切显微镜（又称双管显微镜）。
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轮廓提取是光切法的关键。
The key of the Light-sectioning Method is the outline extraction.
介绍了光切法的原理，并详细介绍了对所获得的数字图像进行处理的步骤。
Introduction included the principle of light-sectioning method and steps of processing the digital images were given in detail.
在分析现有各种三维测量方法的基础上，提出了基于光切图像扫描法的三维测量方法。
After analyzing current three-dimension measuring methods, a new method is proposed on the basis of light-section and image scanning.
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