Credit: NASA infographic
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Real image compression (JPEG, PNG) uses different techniques (DCT, entropy coding), but quadtrees capture the same principle: spend your bits where the detail is, not uniformly across the whole image.
"We have a quern stone for grinding flour for bread. We've got pottery and glass for eating and drinking" says Dr Andy Seaman.
Looking at the Galaxy S26 family, you'd be hard-pressed to tell them apart from last year's phones. The camera surround is different, and the measurements of the smallest and largest phone are ever so slightly different. You probably won't be able to tell just by looking, but the S26 Ultra has regressed from titanium to aluminum, a reversion Apple also made with its latest high-end phones. This phone also retains its S Pen stylus.