using gaussian filter in an image

hi there im trying to use a gaussian filter to remove 50% of the higher frequencies in a picture could you please tell me what is wrong with this code ?

im=double(imread('image.jpg'))/255;

[m,n]=size(im);

imfreq=fft2(im);

h = fspecial('gaussian',[m n],0.5);

hfreq=fft2(h);

a=ifft2(hfreq.*imfreq);

imshow(a)

thank you in advance!

Answer 1

[Image Analyst]

What do you want to do? Use a Gaussian filter, or remove 50% of the higher frequencies? And what does 50% of the higher frequencies mean? Do you mean you want to block 100% of half of the frequencies in the image? Or do you want to reduce the higher frequencies by 50%? If so, where does that start taking effect?