The general fact was thrust into the light by Fourier's work. 這個普遍性事實是由傅立葉的工作揭露出來的。
Some properties of the Fourier descriptors are given and algorithms for computing the Fourier descriptors of the polygonal curve are proposed. 探討傅立葉描述子的一些特性,並且推出用來計算多邊形曲線的傅立葉描述子的演算流程。