Bio: Miles Padgett holds the Kelvin Chair of Natural Philosophy at the University of Glasgow. He leads QuantIC, a quantum imaging centre and one of four Quantum Technology hubs in the UK. In 2001 he was elected a Fellow of the Royal Society of Edinburgh (RSE) and in 2014 a Fellow of the Royal Society, the UK's National Academy. In 2009, with Les Allen, he won the Institute of Physics Young Medal, in 2014 the RSE Kelvin Medal and in 2015 the Science of Light Prize from the European Physical Society.

Abstract
Cameras are often marketed in terms of the number of pixels they possess – the more pixels the “better” the camera. Rather than increasing the number of pixels we ask the question “how can a camera work with a single pixel?”. This talk will link the field of computational ghost imaging to that of single-pixel cameras explaining how spatial structuring of either the illumination or imaging system means that image and video reconstruction can be achieved using just a small number of photodiodes. Such approaches are particularly useful for imaging at wavelengths where detector arrays are either very expensive or unobtainable. Both single-pixel and computational ghost imaging utilise compressed sensing to give images from sparse data enabling faster frame rates than full sampling. Computational ghost imaging has been applied to obtain multispectral images, specifically for the visualisation of leaking gas.