In case of 1-D FFT it is far more easier to find number of harmonics and their Respective frequencies and amplitudes. Lets say if i have 8 points signal the harmonics of it then would be 7 with one DC point i.e,
the harmonics after 4th points would have negative imaginary part as it below the nyquist rate.
but if I've 2D signal of 8x8 Matrix there would be total of 64 harmonics and the Nyquist rate will then be on the 32nd point. Am i right ?
If my above statement is correct, the fractional frequency for the first harmonic then would be ,
0 -> Dc 1st Harmonic - > 1/64 -> 64 samples in 1 cycle
Number of Cycle 1. Number of samples = 64 Sampling rate = 0.015625
What would then be the actual frequency of this Harmonic , I am asking this because i couldn't be able to identify it when i am plotting it on Matlab.