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.
Comment on this post is just 42kib
PeriodicallyPedantic@lemmy.ca 2 days ago
Back when image compression was just reducing the resolution and color depth.
einfach_orangensaft@sh.itjust.works 2 days ago
PeriodicallyPedantic@lemmy.ca 1 day ago
I mean, that’s what dithering is
An artifact that your brain processes as something else.
tias@discuss.tchncs.de 2 days 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.
PeriodicallyPedantic@lemmy.ca 1 day ago
What do you mean “at the time”?
What time are you talking about?tias@discuss.tchncs.de 1 day 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.
PeriodicallyPedantic@lemmy.ca 1 day 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.
CookieOfFortune@lemmy.world 16 hours ago
JPEG also reduces color depth as it’s first step but just in a smarter way. RGB is converted into YCbCr.
PeriodicallyPedantic@lemmy.ca 1 hour 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.