"image-rendering: pixelated" indicates that image should be scaled "so that the image appears to be simply composed of very large pixels", e.g. using nearest-neighbour.
Docs: https://dev.opera.com/blog/opera-26/#css-image-rendering-pixelated http://updates.html5rocks.com/2015/01/pixelated https://developer.mozilla.org/en-US/docs/Web/CSS/image-rendering
Samples: http://jsfiddle.net/zda24/147/ https://github.com/GoogleChrome/samples/tree/gh-pages/image-rendering-pixelated