对一些典型目标的傅氏系数作了数值计算，并用光学滤波把它们抽取出来。
The Fourier coefficients have been numerically calculated for the typical objects, and by using optical filtering the objects are extracted from pictures.
主要就快速傅里叶变换算法、全波傅氏算法以及有功功率、无功功率的计算、滤波的参数选取、谐波的计算进行了讨论。
Mainly, FFT algorithm and full-wave Fourier algorithm are discussed. Calculation of active power and imaginary power is researched. Parameter selection of filtration and calculation of are attained.
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