One can hardly imagine the spiky dervish Grace Jones sitting still for a second, let alone remaining motionless long enough to have photographs (and plenty of them) taken for her portrait. Nevertheless, Chris Levine has managed to pin her down - in a manner of speaking. Levine's exhibition at the Vinyl Factory - Stillness at the Speed of Light - captures the performance artist's restless activity in a very clever way: several of his portraits are in fact lenticular 3D portraits - holograms.

Works of art are usually quite easily recognisable: they’re in a frame, or on a pedestal, or (if it’s a particularly expensive one) there’s a security guard nearby. You’ll probably be in an art gallery or a smart private house too. But what about when the art is in the land? And moreover, when that art is almost too subtle to be noticed?

The annual Sony World Photography Awards began in 2007. They showcase the work of both professional and amateur photographers across genres which inclu  de journalism, fashion, architecture, advertising, sport and music. This year there were over 60,000 images submitted from 139 countries. Each year, the winners and runners-up are collected in an exhibition which tours the world. The London stop of the tour opens today at the Art Work Space gallery in London W2. Here is a selection of images, with short commentaries by the photographers themselves.

When we look at still images of moving figures what we see is not exclusively determined by what is in front of our eyes but what we already know about the world. If we stopped to think about this, it would seem obvious. We would know, for instance, that the putti who are so joyously leaping, dancing and bounding about in Donatello’s static frieze Cantoria would make little sense to us if we didn’t already know what such static postures implied: still images of moving figures can only come alive in the imagination when we have some understanding of how living bodies move, and of what comes before and after.