Deep Learning, Artificial Intelligence, Image Classification, Fourier Transform, Fft.
DFT is a one-to-one transformation. Given the DFT X[k], the original signal x[n] can be recovered by the inverse DFT (IDFT): DFT is widely used in modern signal processing algorithms for mainly two reasons: (1) the input and output of DFT are both discrete thus can be easily processed by computers;