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HungryGuy's avatar

Is There Any Way To Tell That A Photo Of A Person Has Been Reversed?

Asked by HungryGuy (16044points) December 26th, 2009

Suppose You Took A Photo Of A Person Against A Plain Background And Make A Mirror Image Of The Photo. Is There Any Way To Tell That The Person Has Been Reversed?

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15 Answers

Futomara's avatar

Yes, by defining features being on the wrong side.

camouflage_pants's avatar

only if you hold the picture upside down, stand on your head, and hold it up to a mirror.

simpleD's avatar

Aside from any visual clues – one eye larger/lower than the other; hair parted on one side, reversed type on clothing or background – I don’t think there would be any technical evidence that the pixels were reversed. Of course, a forensics expert might know otherwise.

HungryGuy's avatar

@all – I mean aside from clothing, or the way men and women part their hair, or background clues, or known characteristscs of specific individuals, etc…

SherriS's avatar

IF you know that the pic is of Americans and you can see their hands, wedding rings if present are worn on the left hand. Good Question!

jrpowell's avatar

You could also tell by buttons and zippers.

Val123's avatar

Good answers, guys! My first thought was “No, you couldn’t tell…” unless you knew the person very well. But @johnpowell You’re spot on. Buttons and zippers would be a give away.

Val123's avatar

@HungryGuy BTW….may I ask why all of the first letters in every word are capitalized?

HumourMe's avatar

They generally have this opposite, reversing kind of look about their face. ;P

Val123's avatar

@HumourMe I wonder…the human face, the entire body, actually, is asymmetrical down the mid line in everyone. The left side is not an exact duplicate of the right (but the closer they are to being exact duplicates, the more we consider that person “beautiful.”) But I digress. Anyway, one side will be slightly bigger than the other, and I wonder if the bigger side is the same side in everyone? Like, in everyone, is the right side of the body a hundredth of a fraction bigger than the left? Hmmm.

HungryGuy's avatar

@Val123 – Right. The difference would have to be the same difference on every person.

Dr_Lawrence's avatar

Unless you know a person’s face well enough to known what features on their face are asymmetrical (different on one side than the other) there is no way to detect a mirror image.
There are no asymmetries common to any large number of unrelated people.

HungryGuy's avatar

@Dr_Lawrence – Thank you for answering my question! :-)

HungryGuy's avatar

@Val123 – Oh! I just noticed that! I have no idea why the first letter of each word is capitalized…

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