matlab图形高频增强凸显轮廓

题目：利用傅里叶变换在，高频进行增强，凸显边界轮廓代码：I1=imread('C:\Users\Administrator\Desktop\HV-3.jpg');I1=rgb2gray(I1);subplot(1,2,1);imshow(I1);%显示原图像I2=fft2(double(I1));%二维离散傅立叶变换[MN]=size(I2);fori=2:M-1forj=2:N-1ifabs(I2(i,j))1000I2(i,j)=I2(i,j)*3;endendendI2I1=ifft2(I2);%傅里叶逆变换subplot(1,2,2);imshow(I1/255);运行结果：