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474 points rbanffy | 1 comments | 04 Sep 25 22:11 UTC | HN request time: 0.217s | source

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oh_fiddlesticks ◴[05 Sep 25 10:18 UTC] No.45136946[source]▶

This video [1] from a visual effects channel (Captain Disillusion) has an excellent visual illustration of how the Fourier tranform works and how its used in visual effects in his video about blurring and unblurring ("ENHANCE!") images.

1. https://youtu.be/xDLxFGXuPEc?feature=shared

replies(3): >>45137674 #>>45137683 #>>45139745 #

1. alkyon ◴[05 Sep 25 15:32 UTC] No.45139745[source]▶

>>45136946 #

I found this video from 3Blue1Brown more informative in terms of mathematics involved:

https://youtu.be/spUNpyF58BY?feature=shared

Edit: In fact it was already mentioned in the comments, but I haven't noticed

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What Is the Fourier Transform?