Digital Image Processing ch4 Fourier Transform [1]

 Fourier Series :

- periodic signals can be expressed as a sum of complex exponentials

- Frequencies are integer multiples of a fundamental frequency

Fourier transform:

 - Generalization to nonperiodic signals 

 - 1D는 f(x), f(y), 2D는 f(x,y)

 

E = I^2 or V2