首先分析光栅投影法的结构原理，得出高度拟和系数并非常量的结论。
The structural principle of grating is analyzed at first, and then a conclusion is reached that the height fit coefficients are not constant.
光栅投影法是计算机辅助设计、逆向工程等领域用于物体轮廓测量的常用方法。
Grating project is a common method use for profilometry in Computer-Aided Design, Reverse Engineering and other fields.
首先将矩形光栅投影在被测表面上，利用光栅投影法测量自由曲面上每点高度信息。
First, grating is projected on measured free surface, and height data of each point on free surface is measured by the grating projection method.
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