Why do some images initially load fast but look grainy, then fully load and “clear up”, while other images just take longer to load, but load in “full quality”?

Question

Why do some images initially load fast but look grainy, then fully load and “clear up”, while other images just take longer to load, but load in “full quality”?

In: Technology

Answer 1

Different ways of sending it. Sometimes a website or program will load two images, one lower resolution and one higher resolution. The low res one is used to while the higher one sends, so you can get a feel of what you’re looking at.

This is good for say, stock image sites where you’re looking at a bunch of images and as you scroll through you won’t need to see everything and everything, especially as you scroll up to find the few images you want/need. It saves RAM so the site doesn’t stutter as you load more and more images, but also lets you know with relative ease the make up of the image itself.