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It's insidious
(lemmy.world)
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this post was submitted on 19 Nov 2024
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Greentext
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Why is that PNG file 1.3 MB? Is it huge or just unoptimized? Is someone using it as a fullsize Quark poster or something?
PNG is lossless and its compression not well suited for photos. It doesn't even have to be huge to get a photo PNG of that size.
It's not TIFF. This isn't NASA imagery. PNGs do alright on compression for photos.
(at least I hope NASA hasn't captured images of Quark)
TIFF is also such a hot mess when it comes to picking the correct subformat because there are so many options for compression available, some of them FOSS, some of them proprietary. Edit: … and most of them quite dated.
PNG can zip but it's lossless, joh can lose data, and the difference is very significant