Digital technology allows retouchers to fundamentally alter photographic images. The practice is widely used in magazines and advertising but there are moves now to introduce notification of just how far a photograph has been doctored. But with digital cameras don’t the changes begin even as the image is snapped? Hany Farid has developed software which he hopes will be able grade from 1-5 just how far an original image has been altered. He tells Gareth Mitchell just why the software is timely. And the retoucher, Sinisa Savic is interviewed by Snezana Curcic and demonstrates his skills to her.

The mHealth Alliance recently honoured eleven innovators who have used mobile phones in an exceptional way in order to improve people's health. They include Bright Simons, the founder of mPedigree. Bright Simons joins Click to discuss how he is using mobile phones to help unearth fake drugs that have flooded the pharmaceutical industry in many parts of the world.

(Image: A crowd of photographers. Credit: Getty Images)

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18 minutes

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Christmas Day 2011 18:32 GMT