I know how to compute the 1D FFT (and interpret values from 0 to Nyq). When computing the 2D FFT, do we compute the FFT of row[1] then the FFT of row[2] then the FFT of row[3] up to the last row. And then compute the FFT of col[1] col[2] for each of columns across ? But to report the RESULT of the 2D FFT ( do we report the complex value of each final row from col[0] to col[N/2] for each row from top to bottom ?
What INFO does the 2D complex FFT result convey ?