Calculating Fourier transform of an image without using fft2 function in matlab.

Hi every one

I just need the help how to compute the image fourier transformation withourt using the direct fft and ifft functions in matlab?

Answer 1

[Matt J]

Hint: You can create a 1D fft matrix as follows

E=exp(-1i*2*pi/N* bsxfun(@times,(0:N-1).',0:N-1));

[Algorithms Analyst]

Thanks for your response I an using peppers image and i need its 2 dimensional fourier transform without using fft2 function.need the code for implementing F(x,y) function.

[Matt J]

Yes, and the hint I gave you should be very applicable to that.

[Algorithms Analyst]

I am trying but not approaching my target.....can you please define the function in matlab code without using fft2.that how to write code for f(x,y) including smmation from N=0to N_1

[Matt J]

Nope. Especially not given your history of doit4me questions:

http://www.mathworks.com/matlabcentral/answers/contributors/3698936-muhammd/questions