Keywords: BPNM13 8.jpg en a Image of a sinusoidal pattern b Image brightness profile along the line AB in a demonstrating the presence of one strong single spatial frequency as confirmed by the 1D Fourier spectrum of b in c Finally the 2D FT or Fourier spectrum of a is illustrated in d Generated by Kieran Maher using NIH Image own Kieranmaher 2001-01-01 Cc-zero Physics diagrams |