The lights go out and Keyes next appears as a fuzzy image climbing through the drive-thru window.

WSJ: Trying to unlock secrets of dead serial killer

"He was sighted on a road leading towards Penarth and there's a fuzzy CCTV image of him at around 7pm, but that's the last time we have seen him, " she said.

BBC: Six Nations: Missing Wales rugby fan concern mounts

At this setting, the pixelation was pretty clear and the image was downright fuzzy even when viewed from a distance.

ENGADGET: This is what native 4K home cinema looks like on Sony's VPL-VW1000ES projector

As further protection, a passenger's face is blurred and the image as a whole "resembles a fuzzy negative, " said TSA's Lee.

CNN: Airport security bares all, or does it?

Those waves reflect off the body to transmit a three-dimensional image of the passenger that looks like a fuzzy photo negative.

CNN: TSA trying new airline passenger screening machines

Since most image-processing operations, such as sharpening up a fuzzy document, or altering the colours in a photograph, involve looking at the value of a particular pixel and then altering it depending on the value of adjacent pixels, this is a real advantage.

ECONOMIST: Analogue computing