First of all, a filter, based Rayleighfunction, is applied to the area for band filtering, and next, it uses eight direction Gabor filters with interval 22.
使用基于瑞利函数的滤波器对奇异点区进行带通滤波，使用间隔22。
2
It is found that the growth rate of perturbation in linear stage is function of relative Rayleigh number r.