• @fossphi@lemm.ee
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    72 years ago

    Fair enough, but did they use it? I always felt like focusing on statistics instead of random trig stuff for non stem people people would be more useful

    • @mindbleach@sh.itjust.works
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      42 years ago

      Sticking with image compression, see Quite Okay Images. It treats each pixel as three numbers and expects mostly small changes. Recent pixels get hashed and can be referenced in a few bits. This is enough to compete with PNG filesizes, an order of magnitude faster, while handling each pixel exactly once.

      • MinekPo1 [it/she]
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        21 year ago

        though note than lossy formats , like JPEG which was used here , do use Fourier transforms , which are very intense trigonometry . IIRC PNG doesn’t use trigonometry either , though I’m not entirely sure yup PNG uses DEFLATE after some filtering , so no sine there I believe

    • enkers
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      2 years ago

      Agreed, I use highschool level stats knowledge on a nearly daily basis, whereas the last time I did any trig was to follow along with a math video I was watching on YouTube. Trig/calc were mandatory, stats was not.

    • MinekPo1 [it/she]
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      11 year ago

      JPEG uses a lossy form of compression based on the discrete cosine transform (DCT).

      - Wikipedia - JPEG

      Many modern compression schemes are more about signal processing than statistics , especially the lossy ones . IIRC 3blue1brown has a video on image compression if you want to learn about it in a visual way