purikura
Short for "Print Club", Purikura is a term for machines that take pictures of people's faces or figures and print them onto stickers. On the Pixiv platform, it also refers to a tag for artworks designed to resemble these stickers.
It was invented by ATLUS, and "Purikura" and "Print Club" are now registered trademarks of Sega, but the term "Purikura" is colloquially used to refer to similar products from other companies as well.