A Koala at Sydney Zoo looks into a camera
Media playback is unsupported on your device
Video

Could this formula be the key to photo-sharing success?

A researcher at Massachusetts Institute of Technology (MIT) has developed an algorithm which he says can predict how popular a photograph will be when it is posted online.

More than two million images posted to a photo-sharing site were studied by Aditya Khosla's software which analyses colour and recognises objects.

BBC Click's Spencer Kelly finds out more.

Watch more clips on the Click website. If you are in the UK you can watch the whole programme on BBC iPlayer.

Go to next video: Nairobi's young using USB to connect