University of Birmingham > Talks@bham > Physics and Astronomy Colloquia > How many pixels does your camera have? How many does it need?

How many pixels does your camera have? How many does it need?

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If you have a question about this talk, please contact Ilya Mandel.

Cameras are often marketed in terms of the number of pixels they have – the more pixels the “better” the camera. Rather than increasing the number of pixels we ask the question “how can a camera work with only a single pixel?”. This talk will link the field of computational ghost imaging to that of single-pixel cameras explaining how components found within a standard data projector, more commonly used for projecting films and the like, can be used to create both still and video cameras using a single photodiode.

Such single pixel approaches are particularly useful for imaging at wavelengths where detector arrays are either very expensive or even unobtainable. The ability to image at unusual wavelengths means that one can make cameras that can see through fog or smoke or even image invisible gases as they leak from pipes.

Beyond imaging at these unusual wavelengths, by adding time resolution to the camera it is possible to see in 3D, perhaps useful for autonomous vehicles and other robotic applications.

This talk is part of the Physics and Astronomy Colloquia series.

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