Array dimensions must match for binary array op. How to fix this thanks

These are the codes:

input_image = imread ('C.tif');
[M, N] = size(input_image); 
FT_img = fft2(double(input_image)); 
n = 2;
D0 = 20;
u = 0:(M-1); 
v = 0:(N-1); 
idx = find(u > M/2); 
u(idx) = u(idx) - M; 
idy = find(v > N/2); 
v(idy) = v(idy) - N; 
[V, U] = meshgrid(v, u); 
D = sqrt(U.^2 + V.^2); 
H = 1./(1 + (D./D0).^(2*n)); 
G = H.*FT_img; 
output_image = real(ifft2(double(G)));  
subplot(2, 1, 1), imshow(input_image),  
subplot(2, 1, 2), imshow(output_image, [ ]); 

the command window shows that:
Array dimensions must match for binary array op.
Error in Run_1 (line 24)
G = H.*FT_img;

I looked up on other people's questions which are similar but i still don't get it so if anyone can fix this for me, that would be greatly appreciated.

Sorry im new and thanks

[Rik]

Where are you making sure your image is 2D? The tiff format supports a wide range of options, not all of them have only 1 channel. You might need rgb2gray somewhere in there.

[iqbal muzakki]

Yep i did that and thanks

Answer 1

[Ameer Hamza]

Change the line

[M, N] = size(input_image); 

to

[M, N] = size(input_image, [1 2]); 

Also, instead of

FT_img = fft2(double(input_image));

I recommend using im2double()

FT_img = fft2(im2double(input_image));

[iqbal muzakki]

now it shows this:

Error using size

Too many output arguments.

Error in Run_1 (line 3)

[M, N] = size(input_image, [1 2]);

kinda fixed it now it says :

Array dimensions must match for binary array op.

Error in Run_1 (line 24)

G = H.*FT_img;

[Ameer Hamza]

Are you using an older release of MATLAB.

In any case, you can replace the line

[M, N] = size(input_image); 

with

M = size(input_image, 1);
N = size(input_image, 2);

[iqbal muzakki]

Im using R2016b version

[iqbal muzakki]

Phew it works like magic,

Thanks A LOT

Appreciated

[Ameer Hamza]

I am glad to be of help!