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I am trying to have an intuition about the Fourier transform of images

For example the image on the right is the Fourier transform of the image on the left,

my question is :

1)Why are the components of the Fourier transform limited to the horizontal axis?

2)if the stripes of an image of the same size are four pixels wide how the Fourier transform of the image would look like?

enter image description here


marked as duplicate by A_A, MBaz, lennon310, Matt L., Peter K. May 1 at 12:31

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