Senthilkumar ● February 2, 2011 ● Coded in Scilab
The code was written in scilab by me. This will be used to calculate the Inverse fast fourier transform of 2D Transformed Image.
function [a] =ifft2d(a2) //a2 = 2D-DFT of any real or complex 2D matrix //a = 2D-IDFT of a2 m=size(a2,1) n=size(a2,2) //Inverse Fourier transform along the rows for i=1:n a1(:,i)=exp(2*%i*%pi*(0:m-1)'.*.(0:m-1)/m)*a2(:,i) end //Inverse fourier transform along the columns for j=1:m atemp=exp(2*%i*%pi*(0:n-1)'.*.(0:n-1)/n)*(a1(j,:)).' a(j,:)=atemp.' end a = a/(m*n) a = real(a) endfunction