What is $N$,N-point Discrete fourier transform? Is it different from 2D Fourier transform?
and how to compute $N$, N-point Discrete Fourier Transform of a given laplacian filter kernel? say for a given filter {{0, 2, 0}, {1, -2, 1}, {0, 2, 0}}
, where $N = 103$ and frequency and spatial indices ranges from -100 to 100, without using fft2
and ifft2
functions.