说明：  计算Gabor滤波器函数. Gabor1.m:4个方向的Gabo滤波器模板的图像显示. Gabor2.m:4个方向的Gabor滤波器对lena进行滤波的顶层调用模块. gabor.m:绘制一个Gabor滤波器的空域和频域函数图. compute.m:计算Gabor滤波器函数（要被上面3个模块调用，这3个模块彼此独立）
(Gabor filter function calculation. Gabor1.m: 4 directions Gabo filter template image display. Gabor2.m: 4 directions of the Gabor filter for filtering lena call top-level module. Gabor.m: Drawing of a Gabor filter browser s airspace and frequency domain function Fig. compute.m: Calculation of Gabor filter function (to be above three modules call, this three modules independent of each other))