The general fact was thrust into the light by Fourier's work. 这个普遍性事实是由傅立叶的工作揭露出来的。
Some properties of the Fourier descriptors are given and algorithms for computing the Fourier descriptors of the polygonal curve are proposed. 探讨傅立叶描述子的一些特性,并且推出用来计算多边形曲线的傅立叶描述子的演算流程。