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Fourier Transforms

February 14, 2018, 1:48 pm

This is as good of an explanation as I have seen of what is going on in a Fourier Transform.  I have not seen this person's videos before but I will have to seek out others of his.

Tags:
Category: Science

7 Comments

  1. Bloke in North Dorset:

    Check out the bitcoin explanation, as good as you’ll get for the only very slightly techie.

    February 14, 2018, 3:34 pm

  2. jon49:

    Having done electrical engineering one of things that has always fascinated me is e^(-i*pi) = -1. That you would even need to use imaginary numbers to figure this stuff out.

    February 14, 2018, 5:24 pm

  3. sailor116:

    This is hands down the best visualization of the fourier transform I have ever seen, including a live player where you can change the speed of different additive sine waves to see what the resulting wave looks like.
    https://jackschaedler.github.io/circles-sines-signals/dft_introduction.html

    February 15, 2018, 7:59 am

  4. Ward Chartier:

    Wish I had these videos when I was in engineering school.

    February 16, 2018, 7:46 am

  5. The_Big_W:

    This is a great video. Another interesting thing about Fourier transforms is that they can be used in the two dimensional space on images.

    The output from those is as trippy as the graphs shown in the video. The transform also remains reversible as well.

    February 16, 2018, 10:04 am

  6. The_Big_W:

    Done, and you are correct. Thanks.

    February 16, 2018, 10:05 am

  7. jon49:

    My avatar is actually an image of a fourier transform done incorrectly in reverse. I believe it started out as a white circle on a black background, or vice versa. It looked so cool afterwards I kept it!

    February 19, 2018, 8:27 am