https://www.youtube.com/watch?v=bjBZEKdlLD0

  • This is the most understandable Fourier transform of an image.

    • https://www.youtube.com/watch?v=qB0cffZpw-A
    • The x and y of the transformed image represent the wave length of each direction’s wave.
    • By combining the x and y of the transformed image, the wave can be tilted.
      • Does the size of the transformed image (ndarray.shape) have no relation to the original image?
      • To be verified.
    • Can we think that the brightness of each cell represents the intensity of the wave?
      • No, it’s different.
      • The waves are not simply overlaid, but mathematically added together.
      • The brightness represents the weight when adding them together.
  • Demo of image Fourier transform

#imageprocessing#digitalimageprocessing