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this post was submitted on 26 Jul 2023
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No Stupid Questions
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Err...nothing in the file format spec restricts jpg to a particular size. I would actually argue that this undermines your point -- bandwidth was incredibly limited in the 90s compared to what I see today.
Simple example: a 640x480 image is (at least) 307,200 bytes = 0.3M, so it takes at least 5.4 seconds to transmit over a 56k modem. A 4k image, same color depth, is 16000000 bytes = 15M. On a gigabit connection (what I have), that takes about 0.02 seconds.
I was taking more about quality than size in this particular comparison. In 1993 you were happy to squeeze through an image in any quality almost.
It goes hand in hand tho.
If you can compress a 50 MPix, 16-bit, high dynamic range image from a modern high-end DSLR to a reasonable size with a better algorithm and format, you'd also have an easier time squeezing a crappy 640x480 pic to an even smaller size. We just couldn't do either so well 30 years ago.
Heh, in 1993 I wasn't online at all. '97 or '98 is more like it in my case.
That's a fair point, too, better image quality for a given size. I was more focused on raw bandwidth demands.