Error using .* Matrix dimensions must agree.

func1:

function [ ] = fftshow(f)

f1=log(1+abs(f)); fm=max(f1(:)); figure, imshow(im2uint8(f1/fm));

end

func2:

function [ ] = ifftshow( f )

f1=abs(f); fm=max(f1(:)); figure,imshow(f1/fm);

end

main program:

clc; clear all; close all;

a=imread('cameraman.jpg'); figure,imshow(a);

af=fftshift(fft2(a)); figure,imshow(af);

fftshow(af)

[x,y]=meshgrid(-128:127,-128:127); z=sqrt(x.^2+y.^2); c=z<15;

af1=af.*c; fftshow(af1)

i got an error as

Error using .* Matrix dimensions must agree.

Error in fftlpf (line 18) af1=af.*c;

can anyone help me in this regard

Answer 1

[Mike Hosea]

The size of af is the image size. The size of c is 256-by-256. I'm guessing your image is not 256-by-256. If not, what were you expecting af.*c to do? Then we'll see if we can figure out how to do that.