Comment on this post is just 42kib

PeriodicallyPedantic@lemmy.ca ⁨2⁩ ⁨months⁩ ago

• einfach_orangensaft@sh.itjust.works ⁨2⁩ ⁨months⁩ ago

  i mean yeah, its a honest loss of information, jpg on the other hand introduces compression artifacts that are basically hallucinations, meaning it pretends to have more data than it actually has and humans compensate for that thru image recognition and fantasy.

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  • PeriodicallyPedantic@lemmy.ca ⁨2⁩ ⁨months⁩ ago

    I mean, that’s what dithering is
    An artifact that your brain processes as something else.

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• tias@discuss.tchncs.de ⁨2⁩ ⁨months⁩ ago

  It’s really only helpful for formats that will be directly read by hardware (the video chip) and where the “compression” ratio (I would prefer the term quantization) needs to be fixed. For file compression, which was quite mature but CPU- and memory-intensive at the time, the dithering only makes it more difficult to compress further.

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  • PeriodicallyPedantic@lemmy.ca ⁨2⁩ ⁨months⁩ ago

    What do you mean “at the time”?
    What time are you talking about?

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    • tias@discuss.tchncs.de ⁨2⁩ ⁨months⁩ ago

      At the time when dithering was commonly used to achieve the illusion of more available colors, i.e. the 80s and the first half of the 90s.

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      • PeriodicallyPedantic@lemmy.ca ⁨2⁩ ⁨months⁩ ago

        I’m not really convinced that file compression was “mature” at the time. Text compression was reasonable progressed but image compression was created for a reason besides just a requirement for fixed compression ratio.

        But I do agree that it was limited in it’s usefulness.

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• CookieOfFortune@lemmy.world ⁨2⁩ ⁨months⁩ ago

  JPEG also reduces color depth as it’s first step but just in a smarter way. RGB is converted into YCbCr.

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  • PeriodicallyPedantic@lemmy.ca ⁨2⁩ ⁨months⁩ ago

    You’ve phrased this like a disagreement, but I don’t see how.

    Although maybe I’m just so jaded, that people providing interesting tangentially related trivia are perceived as being hostile unless they announce that as their intent, because usually unannounced trivia is leveled as an attack.

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    • CookieOfFortune@lemmy.world ⁨2⁩ ⁨months⁩ ago

      It’s just extra information. Not an attack or disagreement.

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