Install a background? Photoshop? You do realize that the backscatter machines aren't taking a picture right? There isn't a "background" to change. It's basically an X-ray machine, throw some radiation, see what bounces back.
I'll let you figure out why building a backing that is made up of different materials that reflect radiation in a checkerboard pattern won't work.
The phrases "You do realize that" and "I'll let you figure out why" are condescending. The tone of your post is rude. Moreover, you're clearly the one who doesn't understand: The prior poster was proposing a checker pattern of reflective material on the background.
I'll let you figure out why building a backing that is made up of different materials that reflect radiation in a checkerboard pattern won't work.
Uh. Why won't it work? From what I recall of the images, they're sort of gray-scale. The brightness of a body drops off as it falls away from the camera (i.e. the outline of your body is a darker gray than, say, your forward-facing bellybutton region), since, presumably, as we wrap around to the sides of your body, more energy is bounced out to the sides than to the 'camera'.
So, I assume it's depicting the amount of radiation reflected back to the 'camera', right? So, if you make a checkerboard background of materials that bounce differing amounts of energy back (either due to composition of the tile or its angle), why wouldn't it work?
I'll let you figure out why building a backing that is made up of different materials that reflect radiation in a checkerboard pattern won't work.