Even better than the real thing: how to spot a retouch

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The Independent Online

* Airbrushing is the common parlance for the process of digital photo-manipulation, but it is also referred to as retouching, Photoshopping and clearing up

* Almost anything can be achieved in a photograph with Adobe's Photoshop program; dresses can change colour, figures can slim down or fatten up, skin tone can even out, buildings can move closer to each other and people can disappear. Other programs used by professional image-manipulators include Paint Shop Pro, Corel Photopaint and Paint.NET.

* On any commercial picture, a normal amount of retouching may include anything from evening out skin-tone, removing blemishes and dark circles under the eyes, "refining" a jawline, slimming down limbs, and adding shine to eyes, hair and jewellery.

* Often, it's easy to tell when an image has been Photoshopped, because the skin is so flawless that it looks unreal (in the fashion industry, heavy-handed airbrushing of skin is known as the "plastic fantastic" look). Other ways of spotting fakery are to look at where the light falls – fiddling with photos can make them look too "flat". Another way is to look in the subject's eyes to see where the light is coming from to see if it matches shadows elsewhere. If a model's features look too symmetrical, say insiders, the picture probably doesn't tell the whole story. But in the hands of a very good retoucher, there may be no sign of airbrushing at all.

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