I know how to calculate the coefficients for a 2D Fourier Series as shown: 2D real Fourier Series
I calculated the Coefficients A[m][n], B[m][n], C[m][n] and D[m][n]. Now I want to create a magnitude spectrum for my discrete 2D field. How would I do that? How do I add these coefficients up or something like that, that I can plot them over the frequency –
My question is how I am able to create a magnitude spectrum from these coefficients?