Which do you prefer? The original image of a white balaclava-clad rebel in Libya carrying a rocket propelled grenade, or the more dramatic looking battlefield with increased contrast that brings out richer greys and red hues in the clouds, smoke and earth?

The spectrum of digital tools available to photographers to edit images is vast – from professional software such as Photoshop or Aperture right through to consumer tools such as iPhoto or PicMonkey, not to mention hundreds of mobile photography applications.

If you’re of a certain vintage, then you might be a bit nostalgic about the days of film, the whiff of fixer and the time spent honing your skills in a dark room. Today adjusting the fundamental elements of a digital photograph, its DNA if you like, such as exposure/brightness, colour/saturation, whites/blacks, contrast/shadows and much, much more, are as easy as moving a virtual “slider” with a mouse.

But having a palette of digital tools does not mean editing a photo is a piece of cake. Far from it. In fact for photographers and newsroom photo-editors it opens up a raft of ethical questions.

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